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 Commericial Roofing Companies Rated Highest in Quality?

Photo: All Seasons Roofing & Waterproofing, Inc. (2016)

You are the customer. If your goal is to choose a commercial roofing company that will deliver high customer satisfaction and quality, you’ll feel confident in choosing a Diamond Certified commercial roofing 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 commercial roofing 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 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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  • CertainTeed

  • Duro-Last

  • Owens Corning

  • GAF

  • Sarnafil

  • Firestone

  • IB Roof Systems

  • Johns Manville

  • Soprema

CertainTeed Roofing
Owens Corning Roofing
GAF Roofing
ELK Roofing
Duro-Last Roofing
Garland Roofing
Suprema Roofing
Monier LifeTile
WesTile Roofing
IB Roof Systems
ABC Seamless Roofing
Enviroshake Engineered Roofing
Georgia-Pacific Roofing
TAMKO Building Products, Inc.
Decra Roofing
Carlisle Roofing
Tremco Roofs
John Manville Roofing
Custom-Bilt Roofing
Malarkey Roofing
Atlas Roofing Corporation
EPDM Roofing

commercial roofing systems
commercial roof vent installation
commercial tin roofs
commercial roofing shingle installation
commercial metal roofing
rubber roof installation
commercial roof coatings
commercial roof panel replacement
new commercial roofing
commercial reroofing
commercial roof repair
flat roofs for commercial buildings
commercial roof leak repair
commercial steel roofing
commercial roof ventilation
commercial aluminum roofing
commercial asphalt roof
copper roof installation
commercial corrugated roofing
commercial roof coating application
commercial membrane roof
commercial tile roofs

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


NRCA National Roofing Contractors Association www.nrca.net
ABC Associated Builders and Contractors (http://www.abc.org/)
CBIA California Building Industry Association (http://www.cbia.org/)…

NRCA National Roofing Contractors Association www.nrca.net
ABC Associated Builders and Contractors (http://www.abc.org/)
CBIA California Building Industry Association (http://www.cbia.org/)

DCA California Department of Consumer Affairs (www.dca.ca.gov)
NCBE North Coast Builders Exchange (http://www.ncbeonline.com/)
NRCA National Roofing Contractor Association (www.nrca.org)

Know What You Want
Considerations to Ask Yourself Before Selecting a Commercial Roofing Company in Santa Clara County

Be careful to consider several factors before choosing a commercial roofing company in Santa Clara County. Do your research so that you can determine which commercial roofing contract will be able to accommodate your needs the most successfully.

Everyone is different, so write down as much as possible regarding what you are searching for before you begin researching:

  • Do I want a Diamond Certified company that is rated best in quality and backed by the Diamond Certified Performance Guarantee?
  • What is my budget for a new commercial roof installation?
  • What commercial structure am I having a roof installed on?
  • What professional and personal characteristics would I like my Santa Clara County roofing contractor to have? (These may include cleanliness, reliability, honesty, good communication skills, etc.
  • What is the projected time frame for installation of a commercial roof by a professional roofing contractor?
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What To Ask In Person
Get Answers to These Questions When Talking in Person with the Commercial Roofing Contractors

The next step is to interview commercial roofing companies in person. This will give you a chance to show them your building and allow them to review the space on which they’ll install the new commercial roof.

Questions that you may want to ask during your in-person interviews include:

  • Are you a current member of any local and national roofing associations?
  • What is your time frame for starting and completing the commercial roofing project?
  • How do you operate: do you hire subcontractors or have employees?
  • What will be the maintenance requirements for my newly installed commercial roof?
  • Does your Santa Clara County commercial roofing company have a list of former customers as references that I may contact?
  • How does your commercial roofing company calculate pricing for commercial roof installations?
  • What is your track record for customer complaints?
  • Will you provide a written contract that includes payment instructions and total cost?
  • Is payment for the commercial roof installation expected upon completion?
  • Who will haul away any old roofing materials or project waste? Is there any extra charge for this service?
  • Do you understand the specific needs of my industry or location? (Environment affects roofing needs.)
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  • What To Ask References
    Interview References of Local Commercial Roofing Contractors

    It’s best to choose a Diamond Certified commercial roofing contractor because all certified companies have passed an in-depth ratings process that most other companies can’t pass. If you want quality from a commercial roofing contractor in Santa Clara County, 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 commercial roofing contractor 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 commercial roofing contractor. Keep in mind, though, that references provided to you by the commercial roofing 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 phone 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.

    • If you live in one of the smaller cities such as Alviso, Monte Sereno, Saratoga, Mt. Hamilton, Los Altos, and Los Gatos, did they charge extra to travel to your home?
    • Did the commercial roofing contractor show up on time?
    • Did the commercial roofing contractor start and finish the work on time?
    • Were you satisfied with the services from (commercial roofing contractor name)?
    • Did the commercial roofing contractor keep you up to date with the status of the commercial roof installation? Or did you have to call to get information?
    • If you need a commercial roofing contractor in the future, will you consider hiring this commercial roofing company?
    • Would you recommend this commercial roofing contractor to your friends and family?
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  • Review Your Options
    Consider These Factors Before Choosing a Commercial Roofing Company 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 commercial roofing contractor in Santa Clara County for you, look over your notes and consider the following questions:…

    Before deciding on the best commercial roofing contractor in Santa Clara County for you, look over your notes and consider the following questions:

    • Can the commercial roofing company in Santa Clara County meet your needs when it comes to customer service, experience, and scheduling?
    • Is a warrantee and satisfaction guarantee to back up their work offered by the commercial roofing contractor?
    • Does the commercial roofing contractor seem professional and knowledgeable?
    • Is the commercial roofing company sensitive to your budget?
    • Does my commercial roofing company of choice have a good reputation and excellent references which I have checked?
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  • How To Work With
    Tips for Working with Commercial Roofing Contractors in Santa Clara County

    Now that you’ve found the right commercial roofing company in Santa Clara County, including the larger cities of San Jose, Sunnyvale, Santa Clara, Mountain View, and Milpitas, your work as a responsible customer has just begun.

    During your commercial roofing project, pay attention to the following guidelines in order to ensure success with your commercial roofing contractor.

    Don’t Micromanage
    It is important to make your opinions known when something is truly important. But keep in mind that sometimes you have to let a commercial roofing contractor do what he was hired to do. Keep an open mind and listen to your roofing contractor’s ideas.

    Keep Channels of Communication Open
    Communication is always the key to keeping things moving smoothly. Be sure to keep open lines of communication at all times with your commercial roofing contractor.

    Avoid Allowances
    Avoid allowances in the estimate as these can account for huge discrepancies between projected and actual costs. If you are in doubt, err on the side of caution and overestimate.

    Maintain a Project Journal
    You may find it useful to keep a project journal: your own record of the project as it progresses. This could be very helpful in clarifying disagreements and keeping things moving according to schedule. In particular, keep track of all changes to the plan in writing. You may want to include the contract, any change orders, plans, specifications, invoices, bills, cancelled checks, emails, lien releases, warranties, record sheets, identifying information for materials used and any other written correspondence with the contractor.

    Foreseeing and Planning for Potential Problems
    Try to foresee and plan for potential problems. For example, a common problem can be an absentee subcontractor. Outline with your commercial roofing company a contingency plan if this should happen.

    Check Work as It Progresses
    As the work progresses, be sure to check it continually. Don’t wait until everything is done before you check to make sure everything is according to plan.

    Ask for a Written Contract
    Once a contract is drawn up, make sure that it is signed by both parties: you, the project owner, and the commercial roofing contractor. This contract protects the interests of both you and the roofing contractor. It should include the following information:

    • The Santa Clara commercial roofing company’s name, physical address, mailing address and phone.
    • Payment structure and schedule for the new commercial roofing installation
    • Detailed description of entire commercial roofing project
    • Demolition, roof removal and preparation cost and procedures
    • Material cost and type of materials used
    • Project timeline for the commercial roof installation
    • A clear, concise, and complete description of the commercial roofing project, including start and completion dates.
    • Who is overseeing project/performing work
    • Warranties should be written and the length of time as well as limitations should be covered. Warranties should cover materials and workmanship, and names and addresses of the warrantor. This may include the contractor, manufacturer, and distributor.
    • How changes to metal roofing project and/or disputes are handled
    • Any oral promises made with the commercial roofing contractors
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  • Be a Good Customer
    Be a Responsible Commercial Roofing Contractor Customer in Santa Clara County

    It’s the commercial roofing contractor’s responsibility to install quality commercial roofing systems using the best possible installation techniques. But you play a big part in the success of your commercial roofing contractor, too.

    Before you hire a commercial roofing contractor  in Santa Clara County, restate your expectations and goals, and reiterate to the commercial roofing company representative your understanding of the agreement. Most problems with local commercial roofing contractors occur because of a breakdown in communication. By being clear about your expectations and theirs, you can avoid most conflicts.

    Here are a few other steps you can take to be a good customer when hiring a Santa Clara County commercial roofing contractor.

    • Be sure your service representative has a phone number where they can reach you at all times while they’re installing your commercial roof. The work will move along more smoothly if your commercial roofing contractor can reach you for any necessary updates, questions or work authorizations.
    • Remember, a friendly smile goes a long way!
    • Ask your commercial roofing contractor if you should call to check on the progress or if he will call you with updates.
    • Be clear and upfront with the commercial roofing contractor. Let them know what you want from your commercial roofing company, the long-term outcome you’re expecting and specific ways they can satisfy your expectations.
    • When your contractor contacts you, return calls promptly to keep the commercial roofing project on schedule.
    • Pay for the commercial roofing contractor work promptly.

    Why would you want to be a good customer? Commercial roofing companies in Santa Clara County, including those that serve the larger cities of Palo Alto, Cupertino, Gilroy, Campbell, and Morgan Hill,  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
Verify the Commercial Roofing Company’s Work Against the Invoice

When the commercial roofing contractor’s work is completed, most professional commercial roofing contractors will give you a written invoice that details the completed work.

A complete invoice usually includes:

  • The commercial roofing company’s name, physical address, and license umber
  • A list of all services performed
  • The total cost of the commercial roof installation, including the amount due for labor, if any
  • Any applicable guarantees or warranties provided by the commercial roofing company and/or manufacturer

It’s smart to compare the completed work against the invoice. Make sure that the commercial roof installation was completed to your satisfaction. If you have questions about the work that was done, this is the time to ask.

Do not pay your bill in full the following has been completed:

  • All of the work is finished.
  • There has been a final inspection.until
  • The materials and worker’s lien releases have both been received.
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Written Warranties
Request Written Warranties from Santa Clara Commercial Roofing Companies

Before the commercial roofing contractor leaves, confirm any warranties offered by the local commercial roofing contractors and/or commercial roofing manufacturers in Santa Clara County.

A valid written warranty document must detail the following:

  • Your responsibility in the case of a problem with the commercial roofing project and what you need to do in order to redeem the warranty.
  • If the commercial roofing warranty is transferrable to the new owner in the event that you sell the building in which the contractor has added or replaced roofing.
  • The commercial roofing contractor’s name, physical address and state license number
  • The length of time as well as limitations should be covered. Warranties should cover materials and workmanship, and names and addresses of the warrantor. This may include the commercial roofing contractor, roofing manufacturer and distributor.
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Top 10 Requests
Top Service Requests for Local Commercial Roofing Companies

Commercial roofing companies in Santa Clara County provide many different types of services. Following is a list of the top services requested by commercial roofing companies.

Commercial Asphalt Roof
This is a black or brown, tar-like substance used to cover a commercial building. There are four types of roofing asphalt and they are all created by heating and blowing with oxygen. The longer the process, the higher the melt-point of the asphalt.

Copper Roof Installation
This is a flexible metal roof covering composed of copper sheets and joined by seams. The copper sheets develop a green coating on their surface called a patina as they oxidize.

Commercial Roof Vent Installation
This is the installation of a venting system in a commercial roof. Vents installed in the commercial roof allow a continual flow of outside air through the attic. This protects the efficiency of the insulation and helps lower temperatures in the living space.

Rubber Roof Installation
This is the installation of a roof made up of rubber. Rubber is commonly used on roofs due to being extremely waterproof, sanitary and durable. EPDM rubber has aging-resistant properties and is highly resistant to water and steam. It stands up well against oxygen, UV rays, and other chemicals that wear out natural rubber quickly. It is also a great electric insulator.

Commercial Roofing Shingle Installation
This is the installation of shingles on a commercial structure. Shingles are thin oblong pieces of material such as slate or wood that are laid in overlapping rows to cover a roof.

Commercial Roof Leak Repair
This is the repair of leaks in a commercial roofing system. Though you may have a high quality, long lasting roofing system, occasionally the components of the roof will deteriorate and begin to leak. A quality roofing contractor can repair the commercial roof in order to stop leakage and preserve the quality of the roof.

Flat Roofs for Commercial Buildings
This is a covering for a commercial building that is horizontal or nearly horizontal in contrast to a sloped roof. Generally, a flat roof has a pitch that is less than ten degrees. Flat roofs are those that are waterproofed with a membrane.

Commercial Roof Coatings
This is a coating used on commercial roofing that permanently seals your roof, providing protection and greater durability. It creates a moisture and vapor barrier that completely seals the surface of the roof.

Commercial Corrugated Roofing
One of the more popular metal roofing options, corrugated metal is sheet metal which has been rolled or drawn into parallel ridges and furrows for the purpose of additional mechanical strength. Corrugated metal is used for a variety of purposes including roofing, siding, decking, and more. Corrugated metal can be formed into many different shapes and sizes and used for both commercial and residential purposes.

Commercial Membrane Roof
This is a type of roofing system for commercial buildings. It is used on nearly flat or flat roofs. It prevents leaks and moves water off the roof.

Top Commercial Roofing Brands
Many companies are on the market for commercial roofing. Following is a list of popular commercial roofing companies that have had great success.

  • CertainTeed Roofing
  • Owens Corning Roofing
  • GAF Roofing
  • ELK Roofing
  • Duro-Last Roofing
  • Garland Roofing
  • Suprema Roofing
  • Monier LifeTile
  • WesTile Roofing
  • IB Roof Systems
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Glossary Of Terms
Glossary of Terms for Clients of Commercial Roofing Companies

Below are key commercial roofing terms and descriptions that will help you navigate your way through your metal roofing installation from beginning to end.

aluminum commercial roofing
This is a metal that doesn’t rust and is used for metal roofing as well as the fabrication of gutter and flashings.

Below are key commercial roofing terms and descriptions that will help you navigate your way through your metal roofing installation from beginning to end.

aluminum commercial roofing
This is a metal that doesn’t rust and is used for metal roofing as well as the fabrication of gutter and flashings.

Also known as: aluminum sheet price, aluminum sheet, aluminum scrap, aluminum scrap prices, recycling aluminum, aluminum recycling, recycle aluminum, cast aluminum, casting aluminum, aluminum castings, aluminum extrusion, custom aluminum extrusions

asphalt commercial roofing
This is a bituminous waterproofing agent that is applied to roofing materials during manufacturing.

Also known as: asphalt repair, asphalt concrete, asphaltic concrete, asphalt milling, asphalt paver, asphalt cold patch

This material is installed over the top of a roof membrane to help hold it in place.

Also known as: fluorescent ballast, fluorescent ballast replacement, universal ballast, electrical ballast, lutron ballast, lutron dimming ballast, electronic ballast replacement

This is a strip of wood that is often fastened to the structural deck for use in attaching a primary roof system such as a plastic strip, tile, wood strip, or a metal bar which is used to hold or fasten the roof or base flashing in place.

These pieces of wood are built into a roof assembly and stiffen the deck around an opening, support a curb, or are used as a nailer for attachment of flashing or membranes.

This stands for built-up roof which is a roof that consists of multiple layers of reinforcing membrane and waterproofing materials such as ply sheets and asphalt.

Also known as: built up roofing, built up roofs, built up roof weight, roofing shingles, roof shingles, rubber roofing, rubber roof, rubber roofing materials, built up roofing systems, built up roof system, roof repair, flat roof repair, built up roof repair

cap flashing
This materials is used to cover the top edge of base or other flashings.

Also known as: dip cap flashing, metal flashing, metal cap flashing, roof flashing, roof cap flashing, parapet cap flashing, chimney flashing, counter flashing, window capping

contractor’s warranty
This is a written promise to the owner of the roofing materials and roof for workmanship involved in re-roofing or roofing a building.

Also known as: contractors warranty, general contractor warranty, contract warranty, contract performance bond, construction warranty, roofing warrantydra

This is the surface that is installed over the supporting framing members to which the roofing is applied.

This is the act, process, mode of, or device used for draining.

Also known as: water drainage systems, water drainage solutions, lawn drainage solutions, drainage grate, drainage basin, drainage catch basin

The lower, horizontal edge of a sloped roof.

Also known as: roof eave, roof eaves, eaves roof, soffit, what is a soffit, soffits, eaves definition, definition of eaves, eave vents, eave vent, under eave vent, fascia board, eave fascia

These components seal the roof system in places where the roof covering is terminated or interrupted such as around curbs, pipes, walls, etc. It helps prevent moisture entry into the roof system or building.

Heating, ventilating, and air conditioning equipment.

Also known as: hvac systems, hvac, system, hvac duct, hvac ducting, hvac ducts, hvac units, hvac, unit prices, hvac technician, nvac supplies, hvac supply, hvac certification, hvac epa certification

This materials is used to maintain a desired temperature in a structure by reducing the flow of heat into and out of the building.

Also known as: attic insulation, rigid foam insulation, foil insulation, structural insulated panels, foam insulation panels, roof insulation, roof insulation types, wall insulation, foam wall insulation, insulation material, blown in insulation, blown insulation, blown foam insulation

This is the periodic scheduled upkeep of a roofing system.

manufacturer’s warranty
This written promise is for the owner of a roof and roofing materials for material-related problems.

This portion of the roofing system serves as the waterproofing materials.

new roof
This is an entirely new roofing system placed on new construction or replacing an old roof that no longer functions properly.

Also known as: average cost of new roof, new roof cost, new roof estimate, flat roof repair, installing a new roof, how to install a new roof, how much is a new roof, how much for a new roof, cost to replace roof, roof replacement cost, new roof prices, price of new roof, roofing material, new roofing materials

parapet wall
This is a part of a perimeter wall that extends over the surface of a roof.

The degree of steepness or slope of a roof.

This is the measure of a material’s resistance to the flow of heat. The higher a material’s R-value, the more it insulates.

Also known as: r-value calculator, calculating r value, r value windows, window r value, attic insulation r value, attic insulation, attic r value, foam insulation r value, foam insulation wall insulation

The fixing of deterioration, cracks, leaks, and other similar problems on a roof system.

The replacement of a roof or a portion of a roof. It can also refer to the placement of additional roofing materials over an existing structure.

Also known as: reroofing, reroofing a house, roofing materials, roofing material, roofing companies, roofing contractors, roofing contractor, roof replacement, roof replacement cost, roofing estimates, metal roofing, metal roofs, roofers, flat roof, flat roof repair, flat roofing, steel roofing, steel roofing prices, steel roof

roof deck
This component in a structure forms a platform on which the remainder of the BUR components are placed.

Also known as: metal roof decking, metal roof deck, roof deck materials, roof decking materials, flat roof deck, flat roof decks, deck roof ideas, roof deck ideas, roof deck plans, roof deck systems

roof system
This is all of the components of a roof. It includes weatherproofing, waterproofing, roof insulation, roof deck, and vapor barrier.

Also known as: green roof systems, green roof system, steel roofing systems, roofing systems types, roof types, types of roofing systems, standing seam roof, standing seam metal roof

This outlet in a parapet wall or the wall of a building is used for the drainage of water from a flat roof.

Also known as: roof scupper, scupper drain, rain gutters, copper gutters, downspout, gutters and downspouts, scuppers and downspouts, scupper valve

This refers to the angle of incline of a roof.

This is the surface that a roof is installed upon.

This later of material is laid down on a bare deck before the installation of shingles which provide additional protection for the deck.

Also known as: roof underlayment, roof underlayment materials, cork underlayment, plywood underlayment

white roof
This reflective roof is more effective than traditional black asphalt roofs in keeping solar heat out of buildings. This type of roof increases energy savings.

Also known as: white roofing, flat roof coating, roof coating, roof coatings, cool roof, green roofs, green roofing products, roofing materials, best roofing material, rubber roof, rubber roofing

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Frequently Asked Questions
FAQ About Commercial Roofing Services

Q: Why choose a Diamond Certified commercial roofing company?

Q: Why choose a Diamond Certified commercial roofing company?
A: Diamond Certified helps you choose a commercial roofing company with confidence by offering a list of top-rated local companies who have passed the country’s most in-depth rating process. Only commercial roofing 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 purchase is backed by the Diamond Certified Performance Guarantee. So you’ll feel confident choosing a Diamond Certified commercial roofing company.

Q: Do I need a new roof for my commercial property?
A: If you have any of the following problems, you may need a new roof system: unexplained mold; open seams, persistent leaks, flashing pulling away or lifting, or membrane failure that results in the coating wearing away and exposing the underneath mat.

Q: How much will a new roof for my commercial building cost?
A: The total cost is dependent on several factors that include labor, removal of the old roof, materials, and any repairs to the underlying structure. Be sure that your roofer of choice has the proper insurance and commitment to quality.

Q: Should I be concerned if my new commercial roof has blisters?
A: A blistering roof should definitely be looked into as quickly as possible. Blisters are often caused by trapped moisture or a material defect in both Low-Slope membrane and asphalt shingles.

Q: How much insurance should my commercial roofing contractor have?
A: On average, your roofing contractor should have $2-5 million liability policy and worker’s compensation for every person that steps on your roof. There are some small roofing contractors who try to save money by not carrying enough insurance. Though they can pass this savings onto you, if an injury occurs, your personal policy will have to cover the costs. Improper coverage could result in the loss of your business. So be sure your roofing contractor has adequate insurance coverage before you hire him.

Q: How long should my new roof last on my commercial building?
A: The answer to this question depends on many different factors such as quality of materials, the type of roofing system, and the quality of installation. Depending on these factors, your roof may last as little as ten years or a lifetime. It is important to make sure that your professional roofing installers are skilled in every aspect or roofing installation so that you can experience the greatest life expectancy of your commercial roof.

Q: What are the benefits of roof maintenance?
A: A commercial roof can easily cost hundreds of thousands of dollars. The life of your roof investment can be prolonged by semi-annual inspections and maintenance. Proper maintenance also helps you avoid leaks that become costly due to internal water damage to the infrastructure, furniture, flooring, and electrical equipment. An inspection and maintenance includes clearing drains and drainage system to make sure they are running free; checking if all the flashing details are in good condition and free from damage or cracks; removing any unwanted materials and debris such as unwanted vegetation; and evaluating the surface of the roof for deterioration.

Q: What is the difference between a manufacturer’s warranty and a contractor’s guarantee?
A: A contractor’s guarantee is only good for the length of time the roofing contractor is in business. If the company goes out of business, nobody is left to honor the guarantee. This is why it is important to know how long the company has been in business and how many years of experience the contractor has as a roofer. A manufacturer’s warranty is a joint agreement between the manufacturer and the contractor for the first two years of your roof’s life. The contractor is responsible for the first two years, and the manufacturer covers all costs of repairs after the first two years.

Q: What is a green roof?
A: This is a plant layer placed over the water proofing layer of a roof or slightly pitched roof that helps keep the building cooler. Grasses, mosses, and other shade plants may be used. Due to the lack of shade trees, many urban areas have begun to adopt a green roof policy as studies show it reduces the ambient temperature.

Q: What causes leaks on my commercial roof?
A: Most leaks occur at areas of penetration such as vents, air conditioning units, flashing, chimneys, etc. Most leaks happen because of errors from installation. A minimum of 70% of the time it takes to install a roof should be spent making sure all areas of penetration are water-proofed and installed correctly. This is called flashing detail.

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