Diamond Certified Companies are Rated Highest in Quality and Helpful Expertise.

  • Why this rating is the most accurate.
  • Our editors gather deep company info.
  • Performance is Guaranteed.

Diamond certified companies are top rated and guaranteed

Why Trust Diamond Certified Insulation Companies Rated Highest in Quality?

An insulation contractor installs fiberglass insulation in an attic.

You are the customer. If your goal is to choose an insulation company that will deliver high customer satisfaction and quality, you’ll feel confident in choosing a Diamond Certified insulation contractor. Each has been rated Highest in Quality in the most accurate ratings process anywhere. And you’re always backed by the Diamond Certified Performance Guarantee. Here’s why the Diamond Certified ratings and certification process will help you find a top-rated insulation installer and is unparalleled in its accuracy, rigor and usefulness:

1) Accuracy: All research is performed by live telephone interviews that verify only real customers are surveyed, so you’ll never be fooled by fake reviews.

2) Statistical Reliability: A large random sample of past customers is surveyed on an ongoing basis so the research results you see truly reflect a Diamond Certified company’s top-rated status.

3) Full Disclosure: By clicking the name of a company above you’ll see the exact rating results in charts and read verbatim survey responses as well as researched articles on each qualified company.

4) Guaranteed: Your purchase is backed up with mediation and the Diamond Certified Performance Guarantee, so you can choose with confidence.

Click on the name of a Diamond Certified company above to read ratings results, researched articles and verbatim customer survey responses to help you make an informed decision.

More than 200,000 customers of local companies have been interviewed in live telephone calls, and only companies that score Highest in Quality in customer satisfaction–a 90+ on a 100 scale–as well as pass all of the credential-based ratings earn Diamond Certified. By requiring such a high score to qualify, the Diamond Certified program eliminates mediocre and poorly performing companies. Read detailed information about the ratings and certification process.

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Sean Koriat is owner of Attic Crew, a Diamond Certified company. He can be reached at (650) 238-6897 or by email.

Sean Koriat

diamond certified contributor profile and expert article

Sean Koriat: An Energy-Saving Career

By James Florence, Diamond Certified Resource Reporter

PALO ALTO — Upon moving to California from his native country of Israel, Sean Koriat traded a career of saving lives for one of saving energy. “Before I came to the United States, I worked as a paramedic in Israel,” he remembers. “I met my wife on a vacation to California and ended up moving here permanently.” When it came time for him to establish a new professional livelihood, Sean decided to try his hand at a trade that had always interested him: HVAC. “The idea of making people’s homes more energy-efficient and comfortable really appealed to me. I started out working for a local HVAC company and eventually decided to start my own company that specialized in attic cleaning and renovations.”

Today, as owner of Attic Crew, Sean says his favorite part of his job is making customers happy. “Typically, when we show up at a customer’s house, they’re pretty miserable, but by the time we leave, they’re happy and comfortable. That’s a very rewarding transformation to help facilitate.”

A resident of San Jose (where he lives with his wife, Chemda, and their two children), Sean spends his time outside of work on a variety of pastimes. “Personally, I like sports activities like bowling and soccer. However, what I enjoy most is spending time with my family. We like going on walks at nature parks and vacationing at spots like the Monterey Bay.”

When asked what he would do if he were to retire tomorrow, Sean says he would spend more time with his family. “I love my job, but I certainly wouldn’t mind the opportunity to spend more time with my wife and kids. My career keeps me very busy, but it’s worthwhile to know I’m providing a good life for them.”

Ask Me Anything!

Q: What’s your favorite sports team?
A: The Golden State Warriors.

Q: What’s your favorite local restaurant?
A: Pars Kosher Market & Deli in San Jose.

Q: What’s your favorite snack?
A: Chips.

Q: What’s your favorite thing to do on a rainy day?
A: Stay home and spend time with my family.

Q: Music or talk radio?
A: Talk radio.

Read more

Dealing With Rodents in the Attic


PALO ALTO — An overlooked problem found in many homes is rodent infestation in the attic. Most attics contain gaps, cracks and spaces that are big enough for rodents to pass through, and since attics are typically uninhabited, this makes them attractive… Read more

Lior Zeevi is president of Insulation Guru Inc. dba HVAC Guru, a Diamond Certified company. He can be reached at (408) 763-3543 or by email.

Lior Zeevi

diamond certified contributor profile and expert article

Lior Zeevi: East to West

By James Florence, Diamond Certified Resource Reporter

SAN JOSE — After starting his HVAC career on the East Coast, Lior Zeevi decided to pack up and head west. “I began my HVAC career in 2003 while I was living in Miami, Florida,” he recounts. “What drew me to the industry was an interest in the science of HVAC, particularly air conditioning. Pretty much everyone has air conditioning in Florida, so there was plenty of work, and I ended up opening my own HVAC company. In 2012, I sold that business and moved to the Bay Area, where I started a new company.”

As he became more familiar with his new environment, Lior noticed some new opportunities to expand his professional repertoire. “I discovered that a lot of homes in the Bay Area have asbestos in the ducting,” he explains. “That got me interested in the field of asbestos removal, and I ended up becoming licensed to provide that service to my customers. Additionally, I found there was a lot more opportunity for upgrading insulation in the Bay Area, as it is rarely done in Miami. So, I became licensed for doing that as well.”

Today, as owner of Insulation Guru Inc. dba HVAC Guru, Lior says his favorite part of his job is making his clients’ homes more energy efficient. “By replacing insulation and installing new heating and cooling systems, we help our customers save a lot of money over the long term. So, besides the satisfaction of doing a good job, it feels good to know I’m making a positive impact on people’s lives.”

A resident of San Jose (where he lives with his wife, Lee, and their two young children), Lior spends his time outside of work on a variety of active pastimes. “I enjoy outdoor activities like camping, off-roading with ATVs, boating and jet skiing,” he says. “Our kids are still very young, so it has been fun to introduce them to these new things. Of course, sometimes I like to just stay home and relax.”

When asked the first thing he’d do if he were to retire tomorrow, Lior says he’d see the world. “I would take four or five months and just travel. There are lots of places I want to see, like Thailand and Australia, so it would be a great opportunity to do that.”

Ask Me Anything!

Q: Coffee or tea?

A: Coffee.

Q: What’s your favorite season?

A: Summer.

Q: Are you an early bird or a night owl?

A: I’m an early bird.

Q: Do you collect anything?

A: I collect cars. I have a 1984 Mercedes-Benz SL convertible, a 1968 Mustang GT and a 1965 Pontiac GTO.


Q: What’s your favorite local restaurant?

A:  Oren’s Hummus in Sunnyvale.

Read more

Air Conditioning System Maintenance


SAN JOSE — When properly installed, a home air conditioning system should last for at least 20 years. However, in order for the system to reach its expected lifespan, ongoing maintenance must be observed. In addition to prolonging the system’s… Read more

Expert Video Tip

Video: HVAC Maintenance Tips

Complete Video Transcription:

SAN JOSE — Lior Zeevi: So, I wanted to talk today about the maintenance of your system. The most important thing that we want to keep the… Read more

Greg Sutliff is home services division manager at Alcal Specialty Contracting, Inc., a Diamond Certified company. He can be reached at (877) 312-3532 or by email.

Greg Sutliff

diamond certified contributor profile and expert article

Greg Sutliff: A Light in the Attic

By James Florence, Diamond Certified Resource Reporter

SACRAMENTO — While he enjoys both the hands-on and operational aspects of the construction trade, Greg Sutliff says what he loves most about his job at Alcal Specialty Contracting, Inc. is his ability to make a positive impact on the environment. “I tell people I’m saving the world one attic at a time. A big part of what we do is helping people reduce their energy usage by implementing energy-efficient methods and products. I find satisfaction in simply knowing that a homeowner who previously used 20 kilowatts of energy will only use 15 after we’ve completed our work.”

Long before he was saving the world, Greg got started in the industry by sweeping up jobsites after class in middle school. “As a seventh grader making $3 an hour, I was pretty happy,” he laughs. “Over time, I worked my way up to cutting wood and hammering nails, and I eventually became a skilled laborer.” Following college, Greg went to work for a window company, where he gained a working knowledge of the administrative side of the business. Later, after earning his MBA in Finance and Marketing Communication, he sought employment that would incorporate his industry experience and formal education—an opportunity he eventually found with Alcal Specialty Contracting, where he currently serves as Home Services Division Manager.

Greg was born in San Francisco and raised in Corte Madera, but today, he lives in Sacramento with his wife, Liz, and their two children, Emerson and Ellie. As a lifelong Bay Area resident, he says he values the progressive mindset that characterizes the region. “There’s a great appreciation for quality of life and social equality here, and yet there’s also a strong work ethic that rewards those who are diligent and have good ideas. In terms of ideology, it’s the best of both worlds.”

Outside of work, Greg prefers to spend the bulk of his free time outdoors. “My family and I love going hiking and camping at places like Lake Tahoe,” he says. “I also go backpacking with friends a couple times a year through areas like Sequoia and Kings Canyon National Park. Almost all of California’s 14,000-foot mountains are located in that area, which makes for some pretty spectacular views.”

In his professional life, Greg says a crucial part of his success has been his ability to make things right after they’ve gone wrong. “Anyone who’s in construction understands that sometimes things don’t go as planned, but at the end of the day, those things need to be corrected. At Alcal, our motto is, ‘Good people making things right,’ which means we not only strive to do things correctly the first time, but if things don’t go as planned, we won’t leave until we’ve made it acceptable to the customer.”

When asked the first thing he’d do if he could retire tomorrow, Greg says he wouldn’t change a thing. “This is an exciting time in my career, and I really enjoy working for this company. If I had to retire tomorrow, I’d probably continue showing up at work and doing what I’m doing.”

Ask Me Anything!

Q: What’s your favorite sports team?
A: The San Francisco Giants.

Q: Have you ever read a book more than once?
A: The Harry Potter series. I read all the books when they first came out, and now I’m reading them to my kids.

Q: What’s your favorite local restaurant?
A: Mulvaney’s B&L in Sacramento.

Q: If you could be transported to any fictional world, where would you go?
A: Either the Star Trek or Star Wars galaxy—one of those complex, panoptical multiverses.

Q: Captain Kirk or Captain Picard?
A: Picard.

Q: What do you like on your pizza?
A: Olives, sausage, peppers, tomatoes, cheese and red sauce.

Read more

Improving Home Energy Efficiency with Attic Air Sealing


SACRAMENTO — In addition to upgrading your insulation and installing a radiant barrier, a great way to improve your home’s energy efficiency is with attic air sealing. The purpose of attic air sealing is to prevent the transmission of conditioned… Read more

Expert Video Tip

Video: Benefits of Sealing Your Attic Floor

Complete Video Transcription:

SACRAMENTO — Sarah Rutan: When it comes to insulating your attic, there’s a key component you don’t want to overlook. Today we’re in Sacramento with Diamond Certified… Read more




  • Owens Corning

  • Clopay

  • Pabco

  • Bonded Logic

  • Mountain Fiber

Celotex Insulation
Thermax Insulation
Rockwool Insulation
Knauf Insulation
Kingspan Insulation
Polyiso Insulation
Owens Corning Insulation
Johns Manville Insulation
Air Krete Insulation
Guardian Fiberglass Insulation
Armacell Foam Insulation
Fibrex Mineral Wool Insulation
Thermafiber Insulation
Aerocell Rubber Insulation
Pabco Calcium Silicate Insulation
CertainTeed Fiberglass Insulation
Childers Insulation
Unifrax Insulation
Industrial Insulation Group
Manson Fiberglass Insulation
Lewco Insulation
RPR Insulation
Roxul Insulation
Foster Insulation
Nansulate Insulation

foam insulation
spray insulation
attic insulation
polyurethane insulation
wool insulation
exterior insulation
polystyrene insulation
insulation board
spray foam insulation
pipe insulation
wall insulation
blown insulation
ceiling insulation
duct insulation
Styrofoam insulation
green insulation
industrial insulation
insulation installation
reflective insulation
roof insulation
sound insulation
foil insulation
basement insulation
polyisocyanurate insulation
radiant barrier insulation

Blossom Valley
East Palo Alto
Holy City
Los Altos
Los Altos Hills
Los Gatos
Monte Sereno
Monte Vista
Morgan Hill
Mountain View
Mt Hamilton
New Almaden
Palo Alto
Redwood Estates
San Jose
San Martin
Santa Clara


The Association for Better Insulation (ABI) (www.betterinsulation.com)
Blow-in-Blanket Contractors Association (BIBCA) (www.bibca.org)
Cellulose Insulation Manufacturers Association (CIMA) (www.cellulose.org)Insulation Contractors Association of America (ICAA) (www.insulate.org)
National Insulation Association (NIA) (www.insulation.org)
North American Insulation Manufacturers Association (NAIMA)(www.naima.org)

Know What You Want
Researching and Choosing a Good Santa Clara County Insulation Company

Once you are ready to hire a Santa Clara County window cleaning service in the major cities of Palo Alto, Cuptertino, Gilroy, Campbell, and Morgan Hill, it is important to know what you want. Unfortunately, many insulation contractors are less than professional and do not meet the standard of insulation installation required. You will be almost certain to find the most reliable and dependable insulation company if you use the questions below to help you determine what you really want from an insulation contractor.

  • Do I want a Diamond Certified company that is rated best in quality and backed by the Diamond Certified Performance Guarantee?
  • What type of insulation am I looking for: fiberglass, foam, cotton, or cellulose? 
  • Do I plan to live in this home long-term? Or is this a house I plan to sell or a rental property?
  • What personal and professional characteristics would I like my Santa Clara County gutter company to have? (These may include good communication skills, starting the job on time, honesty, reliability, timeliness and cleanliness.)
  • Would I like a reputable insulation contractor that is fully insured and bonded?
  • What is my budget?
  • Before the insulation contractors start the insulation job, are there any changes or repairs I’d like to have made?
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What To Ask In Person
Interview Questions to Ask in Person with Santa Clara County Insulation Installers

After questioning several Santa Clara County insulation contractors on the phone, you will want to cut down your list of prospects in Santa Clara County, including the smaller towns of Alviso, Blossom Valley, Los Altos Hills, Mt Hamilton, New Almaden, and San Martin. Visit those few remaining insulation companies in person. Consider the following questions to help you gain valuable information from your visit with these insulation installers.

  1. What is the R-value of the insulation that you are installing?
  2. What is the cost of insulation?
  3. Can the insulation shift with my house when it settles? Will it keep  same R-value over time? (R-value will be sacrificed when there is a gap or a seam in the material).
  4. Will it reduce the need for finishing materials to lessen the environmental impact during construction? 
  5. Will insulation help my home to be “greener”?
  6. How long will it take the insulation to be installed?
  7. Will the insulation produce an air barrier without using added finishing materials (like tape and plastic wrap) and labor?  
  8. How quickly will the insulation pay for itself? Will the savings every month be more than the cost of financing? 
  9. Will this insulation assist in keeping out allergens, dust and other pollutants? 
  10. Can the insulation dry out well if there is a roof leak and it gets wet? Also would it maintain the insulating properties during the wet then drying process?
  11.  Is the insulation a food source for mold?
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  • What To Ask References
    Questions to Ask References of Santa Clara County Insulation Contractors

    It’s best to choose a Diamond Certified insulation company because all certified companies have passed an in-depth ratings process that most other companies can’t pass. If you want quality from an insulation contractor in Santa Clara County and the greater Bay Area, including the cities of San Jose, Sunnyvale, Santa Clara, Mountain View, and Milpitas, you can have confidence choosing a Diamond Certified company. Diamond Certified reports are available online for all certified companies. And you’ll never be fooled by fake reviews. That’s because all research is performed in live telephone interviews of actual customers.

    If you can’t find a Diamond Certified insulation company within reach, you’ll have to do some research on your own. If you do, it’s wise to call some references provided by your insulation contractor. Keep in mind, though, that references provided to you by the insulation company are not equal in value to the large random sample of customers surveyed during the Diamond Certified ratings process. That’s because references given to customers from companies are cherry-picked instead of randomly selected from all their customers. So the contractors will likely give you a few customers to call that they know are satisfied.

    If you do call references on your own, specifically ask for a list of the company’s 10 most recent customers. This will help avoid them giving you the names of only customers they know were satisfied.

    1. If you live in smaller Santa Clara County towns such as Alviso, Blossom Valley, Los Altos Hills, Mt Hamilton, New Almaden, and San Martin, did they charge extra to travel to your home?
    2. Did the installation contractor clean up once the job was completed?
    3. Did the insulation company offer you a receipt for the installed insulation?
    4. When you need new insulation in the future, will you consider hiring this insulation contractor again?
    5. Would you recommend this insulation professional to your friends and family?
    6. Was the insulation company on time every work day?
    7. Did the installation contractor keep you up-to-date with the status of the project? Or did you have to call in order to get information?
    8. Did the insulation installer stay on schedule?
    9. Did the insulation company provide a written estimate of the expenses?
    10. Did the insulation crew keep a clean work environment? Did the workers clean up after the insulation was completed?
    11. Were you satisfied with the services from _(insulation installing company name)_?
    12. What type of insulation did the company install for you?
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  • Review Your Options
    Find A Trustworthy Insulation Contractor in Santa Clara County

    The Diamond Certified symbol has been awarded to companies that scored Highest in Quality in an accurate ratings process.

    Before deciding on the best insulation contractor in Santa Clara County for you, it’s wise to consider these questions:

    1. Are the insulation professionals sensitive to your budget?
    2. Is the Santa Clara County insulation contractor bonded and insured?
    3. What can the insulation companies offer in Santa Clara County that meet your needs when it comes to types of insulation, scheduling, customer service and experience?
    4. Are the insulation representatives knowledgeable about the brands and techniques they use?
    5. What are the insulation company’s billing practices?
    6. Can they offer various types of insulation and services to meet your resources?
    7. Do the insulation companies offer written warranties that back up their work and their products?
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  • How To Work With
    Getting Ready to Sign a Contract with Santa Clara County Insulation Contractors

    Once you find a local insulation company in Santa Clara County, including the larger cities of San Jose, Sunnyvale, Santa Clara, Mountain View, and Milpitas, that meets all your standards, it is time to ask for a written contract. This contract should include the written details about the price of the insulation, as well as the date when the job will be done.

    Be sure to read and understand all the terms and restrictions before you sign the contract. This contract should protect your home or business and your interests, as well as those of insulation company. Because of this, you should never sign an incomplete estimate.

    Do not be afraid to write specific requests or verbal agreements in the contract. This will protect you and confirm that you get the services you agreed on. You might include issues that are not always in a contract, like any type of house damage from installing the insulation.

    But you can protect your property by being proactive. Before the work begins, schedule a walk through with the company supervisor and conduct a pre-work inspection of your property. List or photograph your landscaping, home and property and talk with a company representative about reasonable expectations for protecting your home and yard during the work.

    When you’ve reached an agreement, both you and the contractor should sign and date the document. When the work is done, do a final inspection together and check to see that your expectations were met.

    Make the Job Run More Smoothly
    Professional insulation companies are able to handle the major and minor aspects of their work. But you can do some things to prepare for their arrival and make the job go more smoothly while the work is in progress. You may even cut down on hours you are billed or the possibility of damage to your home and belongings.

    • Keep children and pets away from the work areas.

    Your contractors will be focused on the work at hand and shouldn’t have to watch out for children and pets before, during or after the work. Cordon off the work area and keep pets and kids away from this area until after the work is done. This will prevent accidents, injury and the expense of any touch up work.

    • Take away the outdoor furniture and the movable items from the around the exterior of the house.

    Before the work begins, remove all indoor or outdoor furniture, decorations, and movable objects from the work area. Anything that’s can’t be removed from the work area should be moved to a part of the house that is out of the workers way. You may also want to temporarily store any expensive items that are in high-traffic areas to prevent them from being broken.

    • Provide adequate clearance and parking space for work trucks.

    Some insulation companies have large work trucks that require more clearance or parking space than average vehicles. Contact the company before the scheduled start date and ask them how many work vehicles will need parking space and whether the vehicles are oversized. You may find it helpful to walk through the site with your contractor ahead of time so they can point out any potential clearance issues or possible hazards you can move or minimize before the gutter protection installation begins.

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  • Be a Good Customer
    How to Be a Good Insulation Company Customer

    It’s the insulation contractor’s responsibility put in quality insulation using the best possible installation techniques. But you play a big part in the success of your insulation, too. Here is some helpful advice you can take to be a good customer when hiring a Santa Clara County insulation company.

    • Be clear and upfront with the insulation company. Let them know what you want from your insulation, the long-term outcome you’re expecting and specific ways they can satisfy your expectations.
    • Ask your insulation company if you should call to check on the progress or if he will call you with updates.
    • Remember, a friendly smile goes a long way!
    • When your contractor contacts you, return calls promptly to keep the insulation company on schedule.
    • Pay for the insulation work promptly.
    • Before you hire an insulation company in Santa Clara County, restate your expectations and goals, and reiterate to the insulation representative your understanding of the agreement. Most problems with local insulation company occur because of a breakdown in communication. By being clear about your expectations and theirs, you can avoid most conflicts.
    • Be sure your service representative has a phone number where they can reach you at all times while they’re installing insulation. The work will move along more smoothly if your insulation contractor can reach you for any necessary updates, questions or work authorizations.

    Why would you want to be a respectable customer? Insulation contractors in Santa Clara County appreciate customers who are straightforward, honest and easy to work with. Your good customer behavior sets the tone from your end and creates an environment conducive to a good relationship. Things may very well go smoother and any problems may be more easily resolved.

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Check The Work
Use the Invoice to Verify the Completed Insulation Company’s Work

When the insulation work is completed, most good insulation companies in Santa Clara County in the major cities of Palo Alto, Cuptertino, Gilroy, Campbell, and Morgan Hill will give you a written invoice that details the finished work. This invoice usually will include:

  • An itemized list of the gutter protection system and the gutter guard supplies purchased.
  • The name, physical address and license number of the contractor.
  • A list of all services performed.
  • Any applicable warrantees or guarantees provided by the insulation system manufacturers and the company.
  • The total cost for insulation services, including the amount due for labor.

It’s a good idea to compare the finished work to what was promised on the written invoice. Ask your company representative to walk through the job site with you and show you the work. Check what was done against the invoice. During the walk-through, ask if there are any special instructions for maintaining your new insulation. If you have questions about the work that was done or the materials used, now is the time to ask.

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Written Warranties
Request a Written Warranty from Santa Clara County Insulation Companies

The majority of good insulation contractors offer some type of warranty on their work or on the materials they’ve used. All warranty details should be provided to you in writing during the contract phase or at the job’s completion. This written warranty information should include the following:

  • The contractor’s name and physical address.
  • Your responsibility in the case of product failure, including actions you must take in order to redeem the warranty. (i.e., if you have to pay for labor or materials, or if you are required to pay a prorated amount).
  • If the warranties are will transfer to the new owner if you sell your home.
  • What products and services are covered. This should also include whether the insulation expert will replace or repair parts in the event of a product failure.
  • Terms, limitations and exclusions on the insulation, materials and workmanship.
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Top 10 Requests
10 Most Popular Requests for Insulation Services

The top 10 requests for residential and commercial insulation services in Santa Clara County are listed below.

Crawl Space Insulation
Insulating the area of limited height which is under a floor or a roof, which is usually where the wiring and plumbing access is.

House Insulation
Applying insulation to a building that lived in by a household or family for the purpose of in thermal, acoustic, or fire insulation.

Spray Foam Insulation
A very specialized two component mixed which comes together at the top of a gun to form an expanding foam which can be sprayed into wall cavities, concrete slabs, and other places insulation is needed.

Insulation Foam
An expanding foam mixture made up of isocyanate and resin which can be sprayed onto roof tiles or wall cavities, among other places.

Basement Wall Insulation
Applying insulation to the walls of the room that is either completely or partially below a ground floor.

Attic Insulation
Installing  approved insulation products, such as rock, wool, fiberglass, and cellulose, evenly across the unconditioned attic area to attain the preferred levels of thermal resistance.

Installing Insulation
Adding insulation to a commercial building or a residential home in the walls, ceiling, or floors.

Basement Insulation
Applying insulation to  the basement of a home or business for thermal, acoustic, or fire insulation.

Spray Insulation
Applying insulation that is forced out of a can or other container onto the walls, ceiling, or floors of a business or home for thermal, acoustic, or fire insulation.

Blown Insulation
A method of applying insulation by mechanically blowing it into the walls, ceiling, or floors of a business, or home for themal, acoustic, or fire insulation.

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Glossary Of Terms
Glossary of Terms for Local Insulation Services

Below are key insulation company terms and descriptions that will help you research, hire and deal with new installation services from start to finish.

Always be sure you understand the terms, products, materials and installation techniques your insulation installer is using. If you don’t understand, ask for clarification until you do.

A substance that is used to bond insulation materials by exterior attachment.

attic insulation
The installation of approved insulation products (rockwool, fiberglass, and cellulose) evenly across the unconditioned attic area to achieve desired levels of thermal resistance.

Also known as: attic insulation installation, attic door insulation, blown attic insulation, attic stair insulation, cellulose attic insulation, attic stairs insulation, foam attic insulation, reflective attic insulation, attic insulation types

attic insulation removal
Removing visible soot and char from the surface of insulating materials sufficient enough to attain an acceptable appearance. Working in attics and endeavoring to eliminate loose soot and char particles off of the  insulation is one of the most difficult jobs.

Also known as: removing attic insulation, remove attic insulation, attic insulation, fiberglass insulation removal, insulation removal, attic insulation types, attic insulation installation, blown attic insulation, types of attic insulation, attic insulation r value, removing blown in insulation, installing attic insulation

basement insulation
Applying insulation to the basement of a home or business for thermal, acoustic, or fire insulation.

Also known as: basement wall insulation, attic insulation, how to insulate a basement, basement foam insulation, insulating basement, basement ceiling insulation, home insulation, basement insulation tips, insulation types, insulate basement walls, basement floor insulation, house insulation

basement wall insulation
Applying insulation to the walls of the room that is either completely or partially below a ground floor.

Also known as: basement wall panels, basement insulation, insulate basement walls, insulation for basement walls, basement floor insulation, insulation basement walls, insulating basement walls, basement wall construction

A piece of stretchy to semi-rigid type insulation with a specific width and length. It may or may not have vapor retarder facing.

Also known as: batt insulation, batting

blanket insulation
A nearly flat and stretchy insulation in sheet form furnished in units of considerable area.

Also known as: fiberglass blanket insulation, space blanket insulation, basement blanket insulation, fiberglass insulation, fire blanket insulation, insulated blankets, weather blanket insulation, thermal blanket insulation, insulating blankets, ceramic blanket insulation

block insulation
Rigid insulation that is formed into rectangular units.

Also known as: concrete block insulation, block wall insulation, cinder block insulation, foam block insulation, insulated concrete block, exterior insulation, insulated concrete blocks, thermal block insulation, under slab insulation

blown insulation
A method of applying insulation by mechanically blowing it into the walls, ceiling, or floors of a business, or home for themal, acoustic, or fire insulation.

Also known as: blown foam insulation, blown in insulation, blown cellulose insulation, green fiber blown insulation, blown in insulation attic, insulation r value, home insulation, insulation types, cellulose insulation, blown fiberglass insulation, blown in insulation types

The process of sealing and making a space watertight or airtight. Caulking is an important part of residential insulation services.

crawl space insulation
Insulating the area of limited height which is under a floor or a roof, which is usually where the wiring and plumbing access is.

Also known as: crawl space insulation installation, insulation crawl space, crawl space moisture, insulation for crawl space

energy code
Requirement in a particular area that will outline the minimum level of insulation and/or other energy-efficiency methods  for construction. These codes will be updated on an ongoing basis. Minimum levels of insulation are set by allowing for the cost of energy and the level that provides a reasonable payback.

fiberglass insulation
Fiberglass is a fibrous material made by spinning molten glass. It is used as an insulator and retardant of heat loss. Fiberglass insulation is a popular choice for homes and businesses.

high-performance insulation
Insulation that is made of fiber glass with densely packed fibers. It results in higher R-values for a specified thickness. This is mainly used in confined spaces like walls or cathedral ceilings.

Also known as: high performance insulation, attic insulation, home insulation, spray insulation, high temperature insulation, insulation contractors, fiberglass insulation, insulation types, cellulose insulation, garage door insulation

house insulation
Applying insulation to a building that lived in by a household or family for the purpose of in thermal, acoustic, or fire insulation.

Also known as: house insulation types, house insulation materials, old house insulation, house wrap insulation, house wrap insulation, types of house insulation, home insulation, insulation r value, basement insulation, insulation, spray foam house insulation, wall insulation

installing insulation
Adding insulation to a commercial building or a residential home in the walls, ceiling, or floors.

Also known as: installing attic insulation, installing insulation in attic, installing fiberglass insulation, installing insulation batts, installing home insulation

insulating cement
A mixture of several insulating fibers along with binders and water to form a moldable paste insulation which can be applied to fittings or irregular surfaces.

Also known as: cement insulation, insulation cement, aerogel insulation, fireproof insulation, vermiculite insulation, high temperature insulation, insulation materials, duct insulation, sound proof insulation, ceramic insulation

The act of being insulated or the state of being insulated. Insulation also refers to the material used in insulating services.

Also known as: attic insulation, installing insulation, basement insulation spray insulation, blown insulation, blow in insulation, crawl space insulation, house insulation, insulate, insulation r values, spray foam insulation, cellulose insulation, fiberglass insulation, insulation foam, spray in insulation, basement wall insulation, home insulation, attic insulation types, garage door insulation, thermal insulation, insulation types, insulation r value

insulation foam
An expanding foam mixture made up of isocyanate and resin which can be sprayed onto roof tiles or wall cavities, among other places.

Also known as: insulating foam, spray insulation foam, insulation foam spray, wall insulation foam, attic insulation foam, insulating spray foam, sound insulation foam, rigid foam insulation, insulation foam board, foam insulation, pipe insulation foam, spray foam insulation r value, spray foam

insulation removal
Process of removing insulation because of mildew and mold.

Also known as: attic insulation removal, insulation removal equipment, asbestos insulation removal, blown insulation removal vacuum, loose fill insulation, removing attic insulation, insulation removal machine, insulation removal bags

pipe insulation
Form of insulation that is appropriate to apply to cylinder surfaces.

Also known as: pipe insulation wrap, hot water pipe insulation, foam pipe insulation, heating pipe insulation, pipe wrap insulation, pipe insulation material, fiberglass pipe insulation, piping insulation, water pipe insulation

Material for insulation that is closed-cell and thermoplastic.

radiant barrier foil
A thin aluminum film which works to reflect the  heat gain. Typically it will be fastened to the underside of a roof or in an attic space. It prevents the heat that is absorbed by hot roofs from transferring to the inside of the home.

Also known as: radiant barriers, radiant barrier, radiant heat barrier, radiant barrier foil insulation, attic radiant barrier, radiant barrier spray, radiant barrier attic foil, efficient attic systems, efficient attic systems, reflective radiant barrier

radiant barrier spray
This spray is a coating which is applied to structures for insulation and other purposes. Spray polyurethane foam (SPF) is the most popular barrier spray. It provides a sealed thermal barrier for residential and business applications. These products are engineered for a diversity of uses which include roofing and fire control. This product is also used to block radiant heat from the sun.

Also known as: radiant barrier paint, radiant barrier foil, radiant barrier, spray on radiant barrier, radiant barriers, attic radiant barrier

This is the measure of resistance to heat flow. Insulation materials will have very small pockets of trapped air, and these pockets will resist the transfer of heat through material. The capacity of insulation to slow down the transfer of heat is measured in R-values. The better the insulation material’s ability to resist the flow of heat through it, the higher the R-value.

Also known as: r value, insulation r value, r value insulation, fiberglass r value, r value glass

spray foam insulation
A very specialized two component mixed which comes together at the top of a gun to form an expanding foam which can be sprayed into wall cavities, concrete slabs, and other places insulation is needed.

Also known as: spray in foam insulation, spray in foam insulation kits, spray on foam insulation, spray foam insulation equipment, foam insulation, spray foam insulation r value

spray insulation
Applying insulation that is forced out of a can or other container onto the walls, ceiling, or floors of a business or home for thermal, acoustic, or fire insulation.

Also known as: spray insulation, spray in insulation, diy spray insulation, spray foam insulation kits, spray foam insulation equipment, spray foam insulation r value, spray insulation types, spray home insulation, spray foam insulation

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Frequently Asked Questions
FAQ for Local Home Insulation Companies

Q: Why choose a Diamond Certified home insulation company?
A: Diamond Certified helps you choose a home insulation contractor with confidence by offering a list of top-rated local companies who have passed the country’s most in-depth rating process. Only insulation companies rated Highest in Quality earn the prestigious Diamond Certified award. Most companies can’t pass the ratings. American Ratings Corporation also monitors every Diamond Certified company with ongoing research and ratings. And your new insulation purchase is backed by the Diamond Certified Performance Guarantee.

Q: What’s the purpose of insulating my home?
A: Insulation will keep the house cooler in the summer and warmer in the winter since insulation will resist the flow of heat. Heat, a form of energy, will always look for a cooler area. This means it will flow out of the house in the winter and into the house in the warmer months. If you can reduce the  heat flow, a well-insulated house uses less energy to heat and cool. Insulation will also acts like a sound absorber With so much noise in our environment today, more are soundproofing their houses.

Q: What parts of a house should be insulated?
A: Attics and external walls are not the only places for insulation. Insulation should be put in  other areas of a house, like attics, basement walls, ceilings that are vaulted, floors over unheated garages or porches, and in between internal walls, particularly the bathroom, lofts or floors.

Q: What does u-value mean?
A: U-Value means the amount of the rate of heat loss. The greater the insulating power, the lower the u-value will be. U-value is how insulation is identified and labeled

Q: Where can I find u-value information when I am buying insulation?
A: Insulation manufacturers always print the u-values of their products on labels or bags of the product.  Most of the time, u-values will be printed on the facings of fiber glass batts and rolls.

Q: How can I get the best performance from my new home insulation?
A: The installation of the insulation is the most important ingredient for performance. Regardless of the insulation type, the full u-value can only be achieved with proper installation. Make sure to choose a certified home insulation contractor.

Q: When adding insulation to your home, do you need to remove the old insulation?
A: Since u-values are cumulative, There is no need to remove any current insulation because u-values are cumulative.

Q: Why and how can sound be controlled with the installation of new insulation?
A: The limiting of sound from one area of the house to another requires the application of special insulation plus standard insulation to enclose the noise generating source. Then it forms a sound barrier between the source and the surrounding area. The purposes of controlling sound is to reduce obnoxious noise (like machines), to reduce the noise level, and to provide for good working conditions.

Q: What options do I have when choosing insulation?
A: You can choose from many types of insulations, such as: cellulose, foam, cotton, and fiber glass. For residential homes, the most common types are fiber glass and cellulose.

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