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 Door Companies Rated Highest in Quality and Helpful Expertise®?

You are the customer. If your goal is to choose a door contractor that will deliver high customer satisfaction and quality, you’ll feel confident in choosing a Diamond Certified door company. Each has been rated Highest in Quality and Helpful Expertise® 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 door installation company 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 and Helpful Expertise®–a 90+ on a 100 scale–and pass all of the credential-based ratings earn Diamond Certified. By requiring such a high score to qualify, the Diamond Certified Resource eliminates mediocre and poorly performing companies. Read detailed information about the ratings and certification process.

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Jeff Alexander is second-generation owner of Alexander Company, a Diamond Certified company since 2012. He can be reached at (650) 525-4171 or by email.

Jeff Alexander

diamond certified contributor profile and expert article

Jeff Alexander: A Clear Opportunity

By James Florence, Diamond Certified Resource Reporter

BURLINGAME — Long before he was second-generation owner, Jeff Alexander could see the clear opportunity his family’s window contracting business represented. “My dad started Alexander Company in 1971, and my brother, John, and I started getting involved as teenagers,” he recounts. “At first, we were helping in the field, but we gradually moved into sales and management. As the company continued to grow, we both saw a lot of opportunity for the future and decided to stick with it. Today, we’re second-generation owners, and since we both have kids who work for the business, we’re looking at possibly a third generation.”

After four decades in the business, Jeff says he still enjoys the simple satisfaction that comes from seeing the results of his work. “I like the transformation that occurs as we take a project from start to finish. It’s very satisfying to see how our work improves a home’s appearance and enhances the homeowner’s view.”

A resident of the San Francisco Peninsula, Jeff expresses his appreciation for work and life in the Bay Area. “I can’t think of a better place to live and work. Besides the nice weather, there’s a lot of opportunity here, which has helped us build a good customer base over the years.”

Outside of work, Jeff spends his time on a variety of active pastimes. “I enjoy playing golf and going to professional sporting events. Besides being a Giants and 49ers fan, I’ve jumped on the Golden State Warriors bandwagon in the last couple of years, as a lot of other people have.” Jeff also likes getting out and about with his wife, Rosie, and exploring San Francisco, the Wine Country and other parts of the Bay Area.

In regard to a professional philosophy, Jeff emphasizes the importance of integrity. “Our aim is to supply our customers with honest, professional service and run our business with integrity,” he affirms. “Basically, we try to treat our customers the same way we’d want to be treated.”

When asked the first thing he’d do if he were to retire tomorrow, Jeff says he’d head to a tropical locale. “I would probably take a trip to Hawaii and just take a couple of weeks to rest and regenerate. After all, what better way to decompress than by relaxing on a beach?”

Ask Me Anything!
Q: What’s your favorite restaurant?
A: Waterfront Restaurant in San Francisco.

Q: What’s your favorite season?
A: Summer—I enjoy the warm weather and long days.

Q: Music or talk radio?
A: It depends on what I’m doing. When I’m running around during the day, I usually listen to sports talk radio, but when I’m home on the weekends, I like listening to music.

Q: What was your favorite toy as a child?
A: My bicycle.

Q: What do you like on your pizza?
A: Salami and mushrooms.

Read more

Choosing the Right Window Contractor


BURLINGAME — When planning for a window replacement project, it’s crucial to hire the right contractor. Here are some attributes to look for in a window contractor: Longevity If a window contractor has been in business for many years, it indicates… Read more

Expert Video Tip

Video: The Key to a Successful Window Project

Complete Video Transcription:

BURLINGAME — Host, Sarah Rutan: When replacing your home’s windows, your most important decision will be which company you choose to work with. Today we’re in… Read more

John Gorman is a 30-year veteran of the window industry and owner of Save Energy Company, a Diamond Certified Company since 2002. He can be reached at (707) 702-1918 or at [email protected]

John Gorman

diamond certified contributor profile and expert article

John Gorman: One Man’s Journey

By MATTHEW SOLIS, Senior Editor Diamond Certified Resource

John Gorman has been enjoying a successful career in the window and door industry for the past 30 years, but the path he followed to get to his current destination wasn’t always clear. In fact, a career in windows wasn’t even on John’s radar until he received an intriguing proposition from a trusted relative. “I was living in New York studying literature and got a call from my older brother,” he remembers. “He was working for a window company in Northern California and wanted to start his own firm, and he asked if I would join him. I said, ‘Sure, I’ll check out California for a little bit.’ Thirty years later, Save Energy Company is still going strong. My brother left in 1999 to do financial planning, but his wife, Pat, is still my business partner.”

When John arrived in the Bay Area, his affinity for his new environment was largely due to the natural beauty he found himself surrounded by—a stark contrast to the urban sprawl of New York and an attraction that remains strong three decades later. “I love living here because I’m surrounded by natural beauty,” he says. “Point Reyes National Seashore and the Golden Gate National Recreation Area are two of my favorite places to spend time. You can be out in the headlands and see a bobcat with the San Francisco skyline in the background…it’s pretty impressive.”

John’s love of nature is conducive to his chosen profession—window installation work requires a lot of time spent outdoors, and Save Energy Company’s wide ranging service area gives him a chance to explore numerous regions of the Bay Area. “That was particularly great in the beginning when I needed to find my way around,” he says. “After a certain amount of years, I’d start to think, ‘Oh, I’ve never been on this street,’ instead of being all wide eyed and wondering how to get anywhere.”

As with any outdoor enthusiast, John enjoys spending his free time playing golf, hiking in the Marin headlands and taking long walks through his hometown of Petaluma. “If I can stay out of a car, I’m a happy guy,” he laughs. “I also like listening to music, going out dancing with my wife and spending time with my son. He really likes the outdoors as well and is into things like rock climbing and bodybuilding.”

John Gorman’s journey from New York literature student to head of a successful California business wasn’t always a straightforward one, but he considers the path he forged to be crucial for where he finds himself today. “I’ve always like the quote, ‘Not all those who wander are lost,’” he says. “Just because someone doesn’t have a set direction doesn’t mean they’re completely at a loss. It’s more about the journey than the destination. The journey is the destination. I’ve had to get comfortable with that over the years, but I understand it better at this point in my life. Each day is enough.”



Q: What’s your favorite sports team?
A: The 49ers. It took me a while to get rid of my New York allegiance, though—I grew up a Jets guy during the Joe Namath days and switched to the Giants as I got older, but I’m loving the Niners now.

Q: What’s your favorite band?
A: The Grateful Dead. I admit it—I’m a Deadhead, which certainly made it easier to move out here 30 years ago. It was a lot of fun seeing them at places like the Greek Theater and Oakland Auditorium. I’ve probably seen them 30 or 40 times.

Q: Have you ever read a book more than once?
A: Sometimes a Great Notion by Ken Kesey. One Flew Over the Cuckoo’s Nest gets all the praise—and deservedly so—but this was a great book in its own right. Oh, and Go, Dog. Go! of course…a classic!

Q: Coffee or tea?
A: Coffee. I go back and forth, but I’d pick coffee if I had to.

Q: Are you a dog person or a cat person?
A: Dog person. We have a Rottweiler/Australian shepherd mix named Rudy. He’s a good guy.

Q: Which superpower: flight or super strength?
A: Flight, because there’s no need for strength if I’m flying around. What could be more fun than that?

Read more

How to Choose the Right Window Frames


PETALUMA — In the past, homeowners who wanted to replace their windows were somewhat limited in their choices. Today, consumers can choose from a wide variety of window options and find a product that best fits their lifestyle, budget and… Read more

Expert Video Tip

Video: Three Window Frame Options

Complete Video Transcription:

PETALUMA — Host, Sarah Rutan: If you’re shopping for windows, you’ll need to decide whether to have wood, vinyl, or fiberglass frames. So, we’re in Petaluma… Read more




  • Andersen

  • Marvin

  • Milgard

  • James Hardie

  • Cherry Creek

  • Hy-Lite

  • Amerimax

  • Peachtree

Krieger Specialty Doors
Maiman Co Wood Doors
Marvin Doors
Masonite Doors
Monaco Doors
Pella Doors
Silver Line Doors
Steelcraft Ingersoll-Rand Co
Steelcraft Steel Doors
Summit Door, Inc.
Superseal Doors
Therma-Tru Doors
Traco Doors
United Window & Door
Algoma Hardwood Doors
Ambico Limited
Andersen Doors
Atrium Windows & Doors
Dunbarton Doors
Integrity Doors
Jeldwen Doors
Kaufman Window & Door
Kawaneer Doors
KML Doors
Kolbe Windows & Doors
Vortex Doors
Weather Shield Doors

residential doors (home doors)
entry doors
patio doors
front doors
fiberglass doors
commercial doors
insulated doors
French doors
folding doors
iron doors
pocket doors
aluminum doors
oak doors
vinyl doors
sliding doors
glass doors
screen doors
exterior doors
interior doors
storm doors
sliding glass doors
steel doors
wood doors
fire doors
metal doors
panel doors
replacement doors

Barbary Coast
Bayview District
Bernal Heights
the Castro
Cole Valley
Cow Hollow
Diamond Heights
Duboce Triangle
Eureka Valley
Financial District
Fisherman’s Wharf
Fort Mason
Glen Park
Golden Gate Park
the Haight
Hayes Valley
Hunters Point
Inner Richmond
Inner Sunset
Jackson Square
Laurel Heights
Marina District
Mission District
Nob Hill
Noe Valley
North Beach
Outer Richmond
Outer Sunset
Pacific Heights
Potrero Flats
Potrero Hill
Rincon Hill
Russian Hill
San Francisco
Sea Cliff
South of Market Street (SOMA)
Sunset District
Telegraph Hill
the Tenderloin
the Presidio
Treasure Island
Twin Peaks
Union Square
West Portal
Western Addition


ASA American Subcontractors Association (http://www.asaonline.com/)
BBB Better Business Bureau (http://www.bbb.com/)
CSLB Contractors State License Board (http://www.cslb.ca.gov/)
DCA California Department of Consumer Affairs (www.dca.ca.gov)
NARI National Association of the Remodeling Industry (http://www.nari.org/)
NCBE North Coast Builders Exchange (http://www.ncbeonline.com/)

Know What You Want
What to Ask Yourself Before Hiring a Door Contractor

Your quest for a satisfying door project begins by clarifying what you want. You can start by asking yourself the following questions.

  • Do I want a Diamond Certified home door company that is rated Highest in Quality and Helpful Expertise® and backed by the Diamond Certified Guarantee?
  • Are you planning to replace your doors, or repair or refinish it?
  • Are you looking for a custom-designed door?
  • What kind of design style do you prefer?
  • What material are you considering?
  • What are your security preferences?
  • Do you plan to maintain your current floor plan and use existing entryways or door openings?
  • Do you plan to replace molding as well as the door?
  • What is the best price you can find for your top selections of new doors? What other materials are required and how much will they add to the total cost?
  • What is your budget for the entire new door installation, including materials and labor?
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What To Ask In Person
What to Ask San Francisco Door Contractors

Finding the right San Francisco door contractor for your project requires you to ask a few simple questions. Contractors have unique qualifications, specializations, and experience, so it is important to find a contractor that has all the skills and track record necessary to provide you with quality work in a timely manner.

Questions to ask on the phone and in person include these:

  • Has your home door installation company earned and maintained a Diamond Certified rating?
  • How long has the door contractor been doing installation or door repairs?
  • Is the door contractor experienced in and equipped to perform the specific type of door project you’ve described?
  • Does the contractor have any creative or technical input on the kind of work you need? For instance, does the contractor think your existing door needs to be replaced? Are sliding doors or pocket doors realistic options given the structural features of the walls? What are the relevant considerations with regards to space and weatherproofing?
  • Does the door contractor have a portfolio and references you may contact?
  • What is the doo contractor’s timeline for bidding, delivering, and/or installing the new door?
  • Does the door contractor have current workers’ compensation and liability insurance coverage?
  • Will the door companies provide a free written estimate?
  • How does the contractor price parts and labor?
  • What type of warranty does the door contractor provide?
  • Will permits be needed for the project? If so, who will be responsible for getting them?
  • Do the contractor’s employees actually complete the work, or do they hire subcontractors for the remodeling? Can the door contractors complete all phases of the job?
  • How and when do the contractors clean up after their work?
  • Will the contractors provide a written contract detailing costs, payments, and a plan for necessary unforeseen modifications?
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  • What To Ask References
    Learn from Previous Door Contractor Customers in San Francisco

    Previous customers can offer a wealth of information about the kind of work you’ll get from a local door contractor before you even sign a contract. All Diamond Certified companies are rated on the basis of independent research and carefully conducted consumer surveys that leave little room for doubt about the kind of service you’ll receive.

    You can read Diamond Certified reports on all certified companies, including verbatim survey responses. When doing so, you’ll never have to worry about dubious ratings or fabricated reviews, because Diamond Certified research is conducted using telephone interviews of a large, random sample of actual customers.

    If there aren’t any Diamond Certified door contractors near you, you can still collect references from the contractors you contact. Taking a little time to survey previous customers on their experience with a contractor removes much of the guesswork involved in selecting the contractor that’s right for you.

    Keep in mind, though, that references provided to you by the door contractors themselves 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. Contractors will often give you a few customers to call that they know are satisfied.

    Request a list of the contractor’s five most recent customers and contact them with questions about their experience with the contractor and satisfaction with the finished product. Some relevant questions include:

    • What was the nature of your door project?
    • Was the work completed in a timely manner?
    • Were you satisfied with the quality of the work you received?
    • Did you encounter unanticipated costs or contractual disagreements?
    • Did you feel you received a fair price?
    • Why did you choose to work with this specific door contractor?
    • What were you most pleased or displeased with?
    • Would you hire this door contractor for another project?
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  • Review Your Options
    Final Questions Before Choosing a Good Door Contractor in San Francisco

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

    Now that you have all the available information in front of you, including estimates, references, credentials, and if available, the endorsement of Diamond Certified, you’re ready to select the contractor that provides the best fit for your door project.

    Review your notes, the estimates you’ve received and your initial impressions, and ask yourself the following questions to help choose the best door contractor for your job.

    • Which interior door contractor’s estimate is within your budget?
    • Which home door contractor’s portfolio is closest to your tastes and preferences?
    • Which door installer’s Diamond Certified reports and previous customer responses are the most enthusiastic and in-line with what I’m looking for?
    Read moreRead less
  • How To Work With
    Write a Contract for Door Replacement or New Door Installation

    Once you’ve decided which contractor best suits your needs, the last step before work begins is to negotiate and sign a contract. A contract is a legal agreement that outlines and protects the interests of both parties. This essential step will make sure that both parties are clear about what a job will entail in costs, payments, and timeframe.

    Your contract should detail how and when the work will be done, which materials are necessary, and how much each material costs. A good contract can spare you the headache of legal action down the line.

    Start your contract by making a list of all responsibilities of both parties. For example, is the San Francsico door contractor you’ve hired responsible for purchasing and moving materials? Who is going to obtain the permits, if necessary?

    Next, determine an agreed upon price for all the involved materials and labor. This is where you can use your preliminary pricing research. If you found hardware or seals cheaper, tell your contractor where.

    Also, don’t be afraid to bring up estimates that other contractors provided you, if they are lower than the contractor you’ve selected. This can help in negotiating a better price for your door remodel. Finally, review the estimate your chosen door contractor has provided and recommend any changes.

    Be sure to include a clause dictating that you wish to approve any costs above the agreed-upon amount.

    Finally, a guarantee of the quality of the work and all warranty time periods should be specifically noted. Once you have agreed upon a cost that fits your budget, a timeline in which the work is to be completed, and a schedule for submitting payments, your door contractor can begin work.

    Obtain and Compare Written Estimates of All Costs Involved in Your Project
    After you have discussed the nature of your specific project in detail with prospective licensed San Francisco contractors, you should obtain a complete, written estimate of charges for all labor and itemized costs of all materials involved.

    Be sure to also get an estimate of labor hours for each phase of the project along with the cost per hour.

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  • Be a Good Customer
    How Can You Be a Good Client?

    It’s the door contractor’s responsibility to provide you with a quality product using the best possible installation techniques. But you play a big part in the success of your door remodel too.

    Here are some steps to ensure that you’re a good customer when hiring a San Francisco door contractor.

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

    Why would you want to be a good customer? Door contractors in San Francisco appreciate customers who are straightforward, honest and easy to work with. Your good behavior as a customer 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
Inspect Verify the Quality of the Completed Door Installation

The last step in your San Francisco door remodel project is to make sure that the work you receive is the work you desired. It should be immediately apparent if your contractor has installed a door or hardware that are different from those you selected.

In addition to this, be sure to inspect that all parts are in working order, seals are present, and molding has been replaced.

If you have any questions about the new door, parts or installation, now is the time to ask.

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Written Warranties
Save Copies of All Warranties in Writing

Ask to keep copies outlining the details of all warranties and guarantees that apply to both the materials used in your door remodel and the service provided.

Warranties written in this document should include:

  • A physical address for the door manufacturer and/or service provider (whichever is responsible for guaranteeing the product and installation).
  • The door installer’s license number.
  • A list of all products or services covered by the warranty.
  • What your responsibilities include in the event that products or services received are defective.
  • The length and transferability of the warranty term.
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Top 10 Requests
New Door Installation and Repair Services in San Francisco

Door contractors in San Francisco can often perform a wide range of tasks, but some door remodel projects are more commonly requested than others. The most requested San Francisco door remodel services include the following.

Door repair services
While many people think of door contractors as mainly installation experts, not all projects require a brand-new door. A simple repair or facelift can give your door new life, and regular service, maintenance, and repair will save you from the more significant costs of new door installation. Additionally, a qualified door repair contractor can perform testing and inspection, and ensure that the operation and efficiency of your doors are optimal.

Door refinishing services in San Francisco
Entry doors are constantly exposed to the elements, and wind, rain, and sunlight take their toll over time. In particular, wood doors require regular maintenance and refinishing, both for longevity and aesthetic appeal. Your door refinishing specialist can restore your weatherbeaten entry door to its natural luster.

Door resealing, weatherproofing, and insulating
Entryway seals will crack, tear, or dry out from repeated use. Most entryways therefore need to be resealed periodically to ensure maximum airtightness and energy efficiency. If your door is causing noticeable energy loss, you need not replace the door entirely. A qualified door contractor can help seal off your door and entryway to prevent further energy loss. A qualified door contractor will assess the needs of your current entryways and provide you with the latest weatherproofing and entry sealing products.

Pocket door installation
The pocket door is a door or set of doors that are housed within the wall, rather than swinging out from it. As such, installing pocket doors can be more labor intensive than installing a traditional swinging door. Your qualified door contractor can address the specific needs of the entryway in which you wish to install pocket doors, and ensure that the door, housing, and hardware are the best fit for your needs.

Swinging door installation
Swinging doors are the standard hinged door and jamb mechanism that is the default for most entryways in a home. You will have a wide range of options for materials and hardware styles for any swinging door, and your door contractor can help you navigate through this array to identify the best fit for your tastes and space. Other relevant considerations include whether to install an inward swinging, outward swinging, rightward opening, or leftward opening door, and how much clearance to leave at the bottom of the door for carpeting or a rug.

Screen or storm door installation
Many exterior doors come in double door systems featuring both a heavy security door, and lighter screen door to allow increased light and ventilation while maintaining a measure of privacy. Screen door options include various window and screen configurations, and materials, from solid wood to aluminum and composite.

Custom door design and installation
If your budget permits, custom door design may be the option for you, as you can work with your custom door contractor to produce something that precisely matches your tastes. Custom door contractors will incorporate the features that you desire, including a range of materials, face designs, windows, and other design elements to deliver an ideal aesthetic and technical product. The most common custom door projects are for entry doors, and can give your entryway a unique, eye-catching design.

Patio door installation
Patio doors can take the form of either hinged or sliding doors. The sliding variety is most common, because most patios are built off of rooms whose furnishings won’t allow for the large swing radius required by a hinge door. These doors often take the form of two single large glass panes, framed by aluminum, wood, or vinyl. For such doors, it is important to take energy efficiency into account. Look for double paned or coated glass doors.

Security door installation
Security doors are built to withstand several hundred pounds of force, and also offer features that protect against intruders, fire, and other hazards. They are also more weather resistant, and come in a wide range of design styles, though they are often made of steel or heavy-duty aluminum. Security doors can therefore offer both maximum peace of mind and aesthetic appeal.

Door hardware replacement
Doors can be opened thousands of times over their lifetimes, and as such, wear and tear on their moving parts requires periodic hardware replacement. In addition to improving functionality, new door hardware can dramatically beautify your existing door. Choose between a wide array of door knobs, handles, and locks to give your door the best security in an attractive set of new hardware.
Top Door Brands Installed in the San Francisco Area
There are many reliable door manufacturers who have a history of high quality products backed by guarantees. If you are searching for a brand new door, here’s a list of some of the top brands in the industry:

  • Kaufman doors
  • Atrium doors
  • Marvin doors
  • Masonite doors
  • KML doors
  • Jeldwen doors
  • Steelcraft steel doors
  • Pella exterior doors
  • Silver line doors
  • Monaco doors
  • Vortex doors
  • Weather Shield exterior doors
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Glossary Of Terms
Terms Used By Local Door Contractors and Door Installers

The following terms and definitions are those used by many door contractors and door installation companies. Becoming familiar with these terms mayhelp you better communicate with your door repair service.

accordion doors
A door style featuring multiple hinged, sliding doors that fold up like an accordion when the door is open. Often used in long arrays to create an open wall.

Also known as: multi fold doors, folding doors

A molding attached to a pair of doors that prevents them from swinging or sliding completely across the entryway or door opening. Also eliminates air gaps, preserving air integrity and reducing infiltration.

back door
An exterior door located in the rear of the home.

A kind of door that can be folded into two parts. similar to accordion doors.

book size
The dimensions of the door as listed by the manufacturer, prior to being sized and custom cut.

A type of door hinge on swinging doors featuring interwoven knuckles connected to flat “leaves” on the door and jamb, into which a pen is dropped.

bypass doorframe
A doorframe used to accommodate sliding doors that move horizontally along a track. Such a system saves space thanks to the elimination of swing area.

A type of molding used as trim for door openings

Covering one material with a protective and insulating layer, often metal.

The transfer of heat through another material.

Cutting the end of wood molding to properly align with and fit the pattern of the wall or other molding.

A concave molding used in corners.

A pattern of intersecting diagonals in the door panels.
Also known as diagonal rail

door bevel
The angled cut of the lock side of the door that enables it to swing free of the frame.

door core
The type of core material used inside a door to obtain some degree of fire rating and strength. Common types are corrugated honeycomb paper, particleboard, wood stave, polystyrene, mineral fiber, and polyurethane.

door face
The large, exterior surface of the door. In wood doors, the surface from which the lumber grade is determined.

The casing into which a door fits, consisting of one header, two jamb legs, and a stop.

door jamb
The part of a frame that contacts the top rail of the door

door panel
A piece of often rectangular material located in the frame made by the stiles, rails, and mullions of a door.

double action door
A door with hinges or pivots that allow it to swing in both directions.

drip cap
A type of molding that helps water flow away from the exterior face of an outside door.

Dutch door
A door split into upper and lower sections that can be opened independently.

extension jamb
Flat pieces position on the inside of a door frame, allowing it to fit flush into a wider wall.

exterior threshold
The threshold that is beveled to prevent water from passing under the door.

French door
A type of door featuring a face made of divided glass panels. French doors often come in double door pairs.

Describes the level of quality of a door material, especially wood.

A fire retardant rock often used in paint.

head casing
The horizontal casing on the top of an entryway.

A strong, relatively durable synthetic material made of molten glass used to make mid-range doors, and as insulation in core material.

fire door
The door designed to meet standards for fire ratings and fire proofing of various durations using special fire resistant cores and frames.

A strip used to eliminate water and air leakage between a door frame and wall.

flexible sweep
A flexible rubber or vinyl strip affixed to the bottom of a door to create a seal.

frosted glass
An opaque, often white colored glass that allows light to pass while still obscuring the view, thereby providing privacy. Common in exterior doors.

Hardware used in the swinging door system to allow the door to rotate open and closed around the hinge radius.

hollowcore doors
Doors that consist of a typical way corrugated cardboard interior, rather than a solid wood or other heavy core material. Lighter and less expensive, these doors also provide significantly less soundproofing and are not as durable.

The passage of air between one environment and another, due to lack of airtightness. Compromises an interior environment.

A material or action that prevents the leakage of heat, moisture, or sound.

knob latch set
Common type of door hardware consisting of a knob that turns a spring operated latch.
Also known as latch set, passage set

lock rail
The rail at lock height of the door, containing the lock block and lock set.

Louvre door
A type of door featuring downward sloping horizontal slats that provide ventilation while still offering a measure of privacy.

The vertical rail that divides the panels in the face of a door.

open wall
A popular design trend featuring a retractable or removable wallspace and blurring the line between interior and exterior home environment. Often accomplished using some variety of sliding door or garage door.

The panel comprised of wood pieces bonded together, often used in the core of the door.

A thin, cylindrical piece that serves as the axis of rotation for hinged doors.

pivot doors
Doors that pivot open by turning around a central radius located somewhere between the side edges, This allows the weight to rest fully on the ground, as opposed to hanging from a hinge, enabling pivot doors to be significantly heavier than traditional swinging doors.

pocket doors
Pocket doors slide out of a wall to cover the door open. When open, pocket doors essentially “disappear” back into the wall, eliminating the swing radius of the swing door and saving space.

The process of minimizing the transfer of soundwaves from one side of an entry way to the other. Often involves creating a vacuum sealed space or installing dampening materials.

solidcore doors
Doors that feature a solid, as opposed to hollow, interior. Heavier, more expensive, and more soundproof, solid-core doors are also stronger, and feel higher-quality

The vertical side pieces on the face of the door.

swinging doors
Traditional hinged doors that feature inward or outward swings and handle hardware, unlike many sliding doors. The most common door design.

Also known as: hinged door

Decorative millwork and moldings surrounding a door opening.

A thin sheet of wood, usually between 1/100 and 1/4 of an inch that forms the surface of many wood doors.

Damage caused by exposure to the elements, especially sunlight, rain, and wind borne particles.

The process of prepping a door and entryway to withstand the local elements with maximum resilience and durability. Often involves water sealing and insulation.

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Frequently Asked Questions
FAQs for Local Door Installers

Q: Why choose a Diamond Certified door contractor?
A: Diamond Certified helps you choose a door contractor with confidence by offering a list of top rated local companies who have passed the country’s most in-depth rating process. Only door remodel contractors rated Highest in Quality and Helpful Expertise® 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 purchase is backed by the Diamond Certified Performance Guarantee, so you’ll feel confident choosing a Diamond Certified door contractor.

Q: How long does a typical door installation take?
A: This depends on the scale of your project. A simple entry door replacement should take no more than one day once materials are obtained. However, installing a home full of brand new products or custom fixtures, and especially, changing the floor plan, will dramatically increase the timeline. Selecting materials and finalizing terms can take 2 to 3 weeks, ordering and delivering materials can take 3 to 6 weeks, removing old materials can take 2 to 3 days, installing new materials can take 1 to 3 weeks, and finishing touches and clean up can take an 2 to 3 days.

Q: Will my door contractor be able to help me choose materials and obtain permits, if necessary?
A: Qualified, licensed door contractors will definitely offer creative and technical expertise in the decision-making process, steering you clear of materials that may not fit your budget or size-constraints, and lending their advice on various materials and manufacturers they’ve worked with. They will also most likely have a portfolio of design options you can peruse, and will know the ins and outs of obtaining building permits.

Q: How long does a typical door project take?
A: This depends on how significantly you overhaul your entryway. Accommodating a new door can require expanding an entryway opening, matching other design elements, replacing other doors and fixtures, weatherproofing and soundproofing, or rearranging the mud room. A simple installation of a correctly-sized door should take less than one day, provided that you hired a capable diamond certified door contractor to obtain adequate measurements and estimate the under-door gap accurately.

Q: How much does a new door cost?
A: This varies widely, from $150 for a basic steel door to several thousand dollars for a custom wood door. Here, the material quality and customization make all the difference. A prefabricated steel, fiberglass, or wood door will cost less than a custom model, and wood is typically more expensive than steel or fiberglass. You can expect a traditional prefabricated swinging door to cost between $200 and $1000, not including installation, which can add an extra $300-600 to the price.

Q: How often should a wood door be resealed or refinished?
A: This depends on the amount of moisture, sunlight, and airborne particles a door is subjected to. In extreme exposure on an unprotected entryway, refinishing may be necessary every year. However, in an entryway that is protected from direct sun and moisture, a door’s finish can last many years. A dry, dull appearance, surface discoloration, and raised grain are all signs your door should be refinished.

Q: Which door material is the best?
A: Wood doors are generally regarded as the most durable and aesthetically pleasing of the common exterior door materials. However, they are typically more expensive and higher maintenance. Steel doors are less weatherproof and durable, but represent the least expensive door material. Fiberglass doors are both durable and moderately priced, but do not offer the same sense of luxury that a wood door does.

Q: What is the typical warranty on a door?
A: Manufacturer warranties can vary depending on the type of door and quality. Entry doors often come with longer warranties, often 20+ years, once again depending on the material and quality. Interior doors feature shorter limited warranties of typically 1 to 5 years.

Q: What is a typical payment schedule?
A: Most contracting firms will require 30-50% up front at the time the contract is signed, an additional 30-40% upon delivery of the materials, and the balance upon completion.

Q: I don’t know much about design—can a door contractor help me find something that looks good?
A: Many larger contractors have a designer and interior decorator on staff who can help you select products that will be an attractive fit for the rest of your home, inside and out, or provide a optimal first step in a complete design overhaul in the future.

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