Overview
About Us
This commercial contractor is a GAF Factory-Certified Contractor.GAF trains and tests thousands of the best roofers in the country and makes sure they're appropriately licensed and insured so they can offer the best guarantees and warranties.
Customer Reviews
"Very friendly company. Working with them has been a breeze. Incredibly knowledgeable and professional!"
"Anna Cotter at Stone Roofing is one of the most qualified and friendly business professionals I've encountered. We have enjoyed doing business with Anna and Stone Roofing over the years, and have never come back disappointed. Anna is extremely knowledgeable and helps run a reliable company."
"Stone Roofing has been nothing but a great company to work with! They are so professional and strive for perfection in everything they do!"
- "Very friendly company. Working with them has been a breeze. Incredibly knowledgeable and professional!"
- "Anna Cotter at Stone Roofing is one of the most qualified and friendly business professionals I've encountered. We have enjoyed doing business with Anna and Stone Roofing over the years, and have never come back disappointed. Anna is extremely knowledgeable and helps run a reliable company."
- "Stone Roofing has been nothing but a great company to work with! They are so professional and strive for perfection in everything they do!"
- "Stone Roofing has completed multiple jobs for my company and we feel strong about their ability to get the job done and even go above there proposed scope of work. Thank you"
- "Our business relies on quality reliable performance from all of our subcontractors. We know this is critical to our customers and our own reputation in the industry. I have found Stone Roofing of Azusa to be a reputable and very reliable contractor for all our commercial customer needs. Their capabilities are respected by many of our business acquaintances in the Los Angeles Basin from Huey Fong Foods to Queen of the Valley Hospital. We will continue to recommend their services to our customers who need repairs or complete roofing on new and existing commercial structures. Anna Cotter is the professional at Stone Roofing who we rely on to make every job run smoothly from the first call to the completed job. Highly recommended!"
- "Working with Stone Roofing Inc. has always been a pleasure. The staff is wonderful and the company does really care about their employees. I would highly recommend their services, especially because I know that it's a great company to work for."
- "Stone Roofing is a truly excellent company to work with. Their staff is very attentive and quick to respond to questions and needs. They really took the time to communicate effectively with us and everyone we have dealt with has been a total professional."
- "Stone Roofing has always performed excellent work. Stone Roofing has always communicated well and has completed work in a timely fashion. Some of the qualities that we have appreciated all of these years in working with Stone Roofing is that they used good quality materials, they take pride in their work, and their employees are always friendly and professional."
- "Stone Roofing is a good company to work with. Their staff is professional and responsive. The offices staff is responsive to calls and the roofer was professional and had many years of experience. They were able to pinpoint the leak and resolve the issue quickly. When you have roof leak the most valuable qualities are timely responsiveness and quality work and Stone's team exhibited both. I would not hesitate to work with them again."
Awards & Certifications
Asphaltic Roofer
This contractor specializes in installing Asphaltic roofing systems.
Certified Maintenance Professional
This contractor will provide an extensive annual inspection to review the condition of your roof. CMPs have the exclusive ability to offer the WellRoof® Guarantee Extension to a building owner, which extends the Diamond Pledge™ NDL Roof Guarantee by 25% at no extra cost.
Coatings Roofer
This contractor specializes in installing coatings systems.
President's Club
This award is given to the best of the best contractors that have distinguished themselves by meeting stringent requirements in the categories of Performance, Reliability, or Service.
Single-Ply Roofer
This contractor specializes in installing Single-Ply roofing systems.
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GAF Awards & Certifications
Residential Contractors
Commercial Contractors
Awards
Master Elite®
A mark of roofing excellence. Only 2% of roofers in North America are invited to become GAF Master Elite® Contractors. It can’t be bought. It can only be earned.*
Get peace of mind with a Master Elite® Contractor Contractor
At GAF, we train and test thousands of the best roofers in the country and make sure they're appropriately licensed and insured so they can offer our best warranties.
This certification requires a minimum of 7 years of experience, is renewed yearly and requires the contractor to be:
Properly insured & licensed:
For your protection, so you can rest easy knowing you're covered
- $1M+ Liability Insurance
- Worker's Compensation Insurance
- State licensed where required and applicable
Reputable & trustworthy:
With a track record of providing quality roofing services in your community
- Good standing with the Better Business Bureau
- Good credit rating per Experian
Highly qualified:
Up to date on the latest technology and practices, ensuring expert installation
- GAF trained and certified
- High property owner job satisfaction ratings
- Able to offer the strongest GAF warranties
Your connection to stronger GAF warranties
The GAF Shingle & Accessory Limited Warranty provides a Lifetime limited warranty term and 10-year 100% coverage period during which GAF will provide both installation labor costs and replacement GAF products necessary to repair your roof due to a manufacturing defect for 10 years.
A GAF Master Elite® Contractor can also offer the GAF System Plus Limited Warranty, increasing your Smart Choice® Protection Period from 10 to 50 years and including tear off.
| Non-certified Contractor | Certified Contractor | Master Elite Contractor | |
| GAF Shingle & Accessory Limited Warranty | ✓ | ✓ | ✓ |
| WindProven™ GAF Roofing System Limited Warranty | ✓ | ✓ | ✓ |
| GAF System Plus Limited Warranty | - | ✓ | ✓ |
| GAF Silver Pledge™ Limited Warranty | - | - | ✓ |
| GAF Golden Pledge® Limited Warranty | - | - | ✓ |
*Contractors enrolled in GAF certification programs are not employees or agents of GAF, and GAF does not control or otherwise supervise these independent businesses. Contractors may receive benefits, such as loyalty rewards points and discounts on marketing tools from GAF for participating in the program and offering GAF enhanced warranties, which require the use of a minimum amount of GAF products. Your dealings with a Contractor, and any services they provide to you, are subject to the Contractor Terms of Use.
Certified™
Only 7% of roofers in North America are invited to become GAF Certified™ Contractors. It can’t be bought. It can only be earned.*
Get peace of mind with a Certified™ Contractor
At GAF, we train and test thousands of the best roofers in the country and make sure they're appropriately licensed and insured so they can offer our best warranties.
This certification requires a minimum of 3 years of experience, is renewed yearly and requires the contractor to be:
Properly insured & licensed:
For your protection, so you can rest easy knowing you're covered
- $1M+ Liability Insurance
- Worker's Compensation Insurance
- State licensed where required and applicable
Reputable & trustworthy:
With a track record of providing quality roofing services in your community
- Good standing with the Better Business Bureau
- Good credit rating per Experian
Highly qualified:
Up to date on the latest technology and practices, ensuring expert installation
- GAF trained and certified
- High property owner job satisfaction ratings
- Able to offer the strongest GAF warranties
Your connection to stronger GAF warranties
The GAF Shingle & Accessory Limited Warranty provides a Lifetime limited warranty term and 10-year 100% coverage period during which GAF will provide both installation labor costs and replacement GAF products necessary to repair your roof due to a manufacturing defect for 10 years.
A GAF Certified™ Contractor can also offer the GAF System Plus Limited Warranty, increasing your Smart Choice® Protection Period from 10 to 50 years and including tear off.
| Non-certified Contractor | Certified Contractor | Master Elite Contractor | |
| GAF Shingle & Accessory Limited Warranty | ✓ | ✓ | ✓ |
| WindProven™ GAF Roofing System Limited Warranty | ✓ | ✓ | ✓ |
| GAF System Plus Limited Warranty | - | ✓ | ✓ |
| GAF Silver Pledge™ Limited Warranty | - | - | ✓ |
| GAF Golden Pledge® Limited Warranty | - | - | ✓ |
*Contractors enrolled in GAF certification programs are not employees or agents of GAF, and GAF does not control or otherwise supervise these independent businesses. Contractors may receive benefits, such as loyalty rewards points and discounts on marketing tools from GAF for participating in the program and offering GAF enhanced warranties, which require the use of a minimum amount of GAF products. Your dealings with a Contractor, and any services they provide to you, are subject to the Contractor Terms of Use.
Master Select™
Get assurance that you’ll be dealing with a quality, reputable and dependable professional when you choose a GAF Master Select™ Contractor.
GAF Master Select™ Contractors must have a minimum of 5 years of experience are required to be:
Properly insured & licensed:
For your protection, so you can rest easy knowing you're covered
- $1M+ Liability Insurance
- Worker's Compensation Insurance
- State licensed where required and applicable
Reputable & trustworthy:
With a track record of providing quality roofing services in your community
- Good standing with the Better Business Bureau
- Good credit rating per Experian
Highly qualified:
Up to date on the latest technology and practices, ensuring expert installation
- GAF trained and certified
- Able to offer enhanced GAF commercial warranties and guarantees
GAF Master Select™ Contractors are your connection to the strongest GAF commercial guarantees and warranties
| Non-GAF Contractors | GAF Master Contractor | Master Select™ Contractor | |
| Standard Limited Product Warranty | ✓ | ✓ | ✓ |
| Weather Stopper© Integrated System Limited Warranty | - | ✓ | ✓ |
| System Pledge™ Limited Warranty | - | ✓ | ✓ |
| Emerald Pledge™ Limited Warranty | - | ✓ | ✓ |
| Diamond Pledge™ NDL Roof Guarantee | - | 30 year maximum term No Dollar Limit Guarantees (NDL) | 35 year maximum term No Dollar Limit Guarantees (NDL) |
*Contractors enrolled in GAF certification programs are not employees or agents of GAF, and GAF does not control or otherwise supervise these independent businesses. Contractors may receive benefits, such as loyalty rewards points and discounts on marketing tools from GAF for participating in the program and offering GAF enhanced warranties, which require the use of a minimum amount of GAF products. Your dealings with a Contractor, and any services they provide to you, are subject to the Contractor Terms of Use.
Master
Get assurance that you’ll be dealing with a quality, reputable and dependable professional when you choose a GAF Master Contractor.
GAF Master Select™ Contractors must have a minimum of 5 years of experience are required to be:
Properly insured & licensed:
For your protection, so you can rest easy knowing you're covered
- $1M+ Liability Insurance
- Worker's Compensation Insurance
- State licensed where required and applicable
Reputable & trustworthy:
With a track record of providing quality roofing services in your community
- Good standing with the Better Business Bureau
- Good credit rating per Experian
Highly qualified:
Up to date on the latest technology and practices, ensuring expert installation
- GAF trained and certified
- Able to offer enhanced GAF commercial warranties and guarantees
GAF Master Contractors are your connection to the strongest GAF commercial guarantees and warranties
| Non-GAF Contractors | GAF Master Contractor | Master Select™ Contractor | |
| Standard Limited Product Warranty | ✓ | ✓ | ✓ |
| Weather Stopper© Integrated System Limited Warranty | - | ✓ | ✓ |
| System Pledge™ Limited Warranty | - | ✓ | ✓ |
| Emerald Pledge™ Limited Warranty | - | ✓ | ✓ |
| Diamond Pledge™ NDL Roof Guarantee | - | 30 year maximum term No Dollar Limit Guarantees (NDL) | 35 year maximum term No Dollar Limit Guarantees (NDL) |
*Contractors enrolled in GAF certification programs are not employees or agents of GAF, and GAF does not control or otherwise supervise these independent businesses. Contractors may receive benefits, such as loyalty rewards points and discounts on marketing tools from GAF for participating in the program and offering GAF enhanced warranties, which require the use of a minimum amount of GAF products. Your dealings with a Contractor, and any services they provide to you, are subject to the Contractor Terms of Use.
Premium Coating Systems
Contractors with Premium Coating Systems certification focus on coatings and liquid membranes, and have a proven track record specifically with these products. Their training and project performance with GAF have enabled them to qualify for this distinct designation.
Premium Coating Systems certification requires proper insurance and licensing, a strong reputation for quality, and a commitment to understanding the latest technology and installation methods.
Contractors with GAF Premium Coating Systems certification are also your connection to the strongest GAF commercial guarantees and warranties for this product category
President's Club Award
These contractors represent the best of the best of our Master Elite®, Master Select™, and Premium Coating Systems Contractors.
They have distinguished themselves by meeting stringent requirements in the categories of Performance, Reliability, or Service.