Roofing Design

Fiberglass Roof Installation

Garrison Roofing offers a wide range of fiberglass roofing systems fitted through highly trained and approved installers. We are the ultimate fiberglass roofing system suitable for both residential and commercial establishments. We have installed hundreds of fiberglass flat roofs around Philadelphia. Also, with many years of experience, we have grown and adapted to the changing needs of the customers and so when you are approaching us you can rest assured of getting the best quality service for fiberglass roof installation.

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Your investment is secured with Garrison Roofing as we are experts in our profession, fully licensed, and have an A+ rating BBB accredited


Every project or task is done very professionally by our professional & expert award-winning team.


Maintenance job is done for each and every roofing project very professionally and dealt each project with care.

Support 24/7

The Garrison Roofing support team is always there to assist you whenever you need it.

Garrison Roofing Philadelphia can meet all of your Home or Residential Roofing needs.

Rob Garrison

Benefits of Fiberglass Roofing:

Fiberglass roofing installation has become a popular choice for homeowners in recent years. There are many benefits to choosing a fiberglass roof, such as its durability and weather resistance. The benefits of fiberglass roofing are so popular among homeowners.  
  1. 1. Fiberglass is one of the strongest construction materials available on the market. It undergoes a rigorous manufacturing process that produces a tensile material suitable for outdoor installations. Due to its high resilience, it creates decking with excellent dimensional stability which enhances the functionality of your deck.
  2. 2. The non-porous nature of fiberglass gives it an extremely high resistance to moisture. Your deck will not warp or rot due to the effects of water. Fiberglass copes well with extreme hot and cold weather conditions. Prolonged exposure to sunlight doesn’t affect the color appearance because the color is ingrained right through the material.
  3. 3. Not much work is necessary to keep your fiberglass deck in good shape. It doesn’t require special cleaning materials. Simply vacuum the surface to get rid of dust and light debris. Occasionally, you may want to use a damp mop to wipe away dirt and soil. A more thorough wash can be done once a week with warm water and mild detergent. Fortunately, fiberglass doesn’t develop stains easily due to its non-porous nature. This makes it even easier to care for fiberglass decking.
Contact Garrison Roofing contractors to learn more about fiberglass roofing and Get a Free Estimate.

How is a Fiberglass Roof Installed?

  Weather is very important when installing a fiberglass roof since it is laid as a liquid. Dry, mild weather conditions are needed. Fiberglass roof installations require lots of preparation and experience. That’s why it’s important to hire a professional roofing contractor who has experience installing this type of roofing system.  


  • 1. First remove the old roofing down to the joists.
  • 2. Next step is to install new decking by installing plywood sheets to the roof joists.
  • 3. Then prep the new decking by sanding out any imperfections in the sheathing using a rotary grinder outfitted with an abrasive disc to soften and clean up any sharp or rough plywood edges. Then mix up a batch of polyester putty and cover the nail holes as well as the plywood joints. We will also putty around the scuppers, filling in any gaps between the sleeves and the plywood.
  • 4. The next step is to apply the Fiberglass resin to the decking with a thick-nap paint roller and/or brushes. The fiberglass resin and the Gelcoat (finish coat) used on these decks are both two-part mixes that require a hardener or catalyst. When a catalyst is added to the polyester resin, an exothermic reaction occurs, producing heat and curing the fiberglass (resin and catalyst are highly combustible and should always be treated with extreme care).
  • 5. At the thresholds of all doors leading onto the deck, we apply resin up the framing and sheathing.
  • 6. After the Fiberglass resin is in place we again sand out any imperfections before the fiberglass mat is installed. Two ounces of chopped fiberglass mat is installed in sections throughout. When all the pieces are cut and in place, we begin soaking the mat with mixed resin, starting with the tops of the parapet walls. For larger surfaces, we again used a disposable nap paint roller. For tighter details like inside corners, we soaked the resin into the mat with a disposable brush. When completely soaked with resin, the mat becomes transparent.
  • 7. Once the resin-impregnated fiberglass mat has cured (usually within a few hours), the deck surface is virtually watertight—think of the hull of a fiberglass boat. The horizontal surfaces are completely sealed, and the sealed surface extends up the vertical surfaces, as well. But fiberglass boat hulls are smooth and opaque. The main task on the third day is applying the gelcoat, the protective finish that also protects the fiberglass from UV degradation.
  • 8. The first step in the gel coat process is to grind all the surfaces once again to roughen the surface and to smooth out any unevenness in the mat. As before, we use a grinder with an abrasive disc to prep for the gel coat. When the surface is abraded and dust-free, we apply the fiberglass gelcoat to the surface, beginning with detail areas such as thresholds. The gelcoat is a two-part product that has the consistency of paint. As with the resin layers, we use a paint roller to coat the tops of the parapet walls and the transition between the inside parapet walls and the horizontal deck surface. Then we rolled out the main deck surface for final completion.
  • 9. The cured gel coat provides a durable, weatherproof walking surface, though pressure-treated sleepers could also be glued to the fiberglass and standard decking applied for clients who don’t like the look or feel of fiberglass.
Hiring a professional roofing contractor is the best way to ensure that your Fiberglass roof is installed correctly. Fiberglass roofs are a great investment for your home and will provide you with many years of protection. Contact a Garrison Roofing Contractor today to learn more about Fiberglass roofs and get a free estimate!

Why Choose Garrison Roofing?

  1. 1. Fully licensed, bonded, and insured with industry-leading manufacturer warranties.
  2. 2. The best customer service in the business.
  3. 3. Fantastic financing options including low-interest and zero-down offers.
  4. 4. The highest quality products and certified roofing technicians on every project.
If you aren’t sure about using fiberglass shingles or asphalt shingles, please Contact Garrison Roofing, as we are experienced in fiberglass roofing installation. Call us or email us any time Monday to Friday from 8 am to 6 pm. Our Emergency Repair Services are on call 24 hours a day, 7 days a week, 365 days a year.
Contact Garrison Roofing Today     If you are concerned about getting a roof that will stand the test of time until you are ready to sell a home or pass it on to your children, a new roof in Philadelphia is your best bet.
Send us your inquiry via email at: or Call (267) 977-6452 to get in touch with us today!
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Abass Mohammed
Abass Mohammed
Alonzo Lyas
Alonzo Lyas
I got my porch roof “repaired” in January of 2022 due to leaks within my enclosed porch. During our telephone consultation Robert set up a date with me to complete the inspection and provide an estimate. The day came and went I was not notified by anyone as that was the agreement. I look in my email and see that I have had my roof “inspected” with sky photos and all. The inspection and estimate was given on my home and I was not even notified of anyone coming out. Next, the day of the job the team came out on an agreed date “repaired” my porch roof. Next, i paid, but got an invoice with a $100 discount which I was never given back. After about two weeks to a month the leaks started again, i notified the team and they came out without notifying me again. I just so happen to be coming out of my house when I saw them. Next the leaks happened multiple times snd I reached out via email several times and never was assisted. When I reached back out on IG and text Rob said the office manager who handles emails was out of the office and he’d help. Rob explained that he would schedule a time to come out but came out on his own again without notifying me. This time after he completed “repairs” he said my roof was 100 and it was my neighbors roof and then proceeded to do work on their roof without permission from either me or them. Now after severe rain yesterday, the leaks have gotten extremely worse. I reached out on IG again and the messages were read without response. At this point I don’t know how to get a response other than leave a negative review as i see he replies to that as it may affect his business opportunities. At this point I am requesting a full refund and the 15 year warranty to be honored. One of two things happened, the work that was done was not done right or two my roof was misdiagnosed by his team. Either way I am extremely dissatisfied with this service.
Venice (Grim927)
Venice (Grim927)
Found them on Instagram. Got back to me with a detailed quote and a fair price. Happy to get an appointment within a few days. Friendly staff. Easy communication. I appreciate it all!! Great work!
Jay Stephens
Jay Stephens
Young Prince Inc
Young Prince Inc
The crew showed up on time. The work was done timely. The team removed all debris and was very professional. I have recommended Garrison roofing to others and will continue to do so.
Marquita Johnson
Marquita Johnson
Garrison roofing was a breath of fresh air in terms of their service. Availability, communication, and follow up was grade A! Hoping the repair is fixed for good with their service!
Claudette Townsend
Claudette Townsend
I was recommended this company by someone whom uses them on their investment properties in Philadelphia. I contacted the company and they promptly got back to me with pictures of my roof. They also provided a detailed work order, answered the many questions I had and honored a special I saw them advertising. A date(which was beyond cold)and time was set for 8 am. They were at my property at 7:40 am! The three workers were pleasant, professional and went straight to work.The work was exceptional and a guaranteed warranty for 15 years. I would definitely recommend this company to family, friends and neighbors.
Tanesha Washington
Tanesha Washington
Garrison Roofing, really came through for me. I was also one of the first of 20222 to receive their community grant support and give back. A great percentage off of my original price. They were a big help to me, especially with this pandemic that is going on. Thank you so much 😁
Schimri Yoyo
Schimri Yoyo
On Mar. 14, 2016, my wife and I contacted Robert Garrison to give us an estimate to repair a badly leaking roof. He e-mailed us a quote for $1,875 for the entire job, which included a 15-year warranty for the flat roof. Robert completed the job within a week and we eventually settled on $1,600 for the entire job. On Nov. 15 there was a flash snow storm in the Delaware Valley and we received about 4 inches of snow and 2 inches of rain in Philadelphia. The following morning, Friday, November 16, my wife and I discovered that small leak in our roof in the same area/spot that Rob had fixed back in Mar. 2016. I immediately called Robert Garrison and he answered my phone and once I gave him my address and the pertinent details he said that he remembered the job and had all the paperwork saved. We texted back and forth with him asking me to send him a picture of the leak and the damage, which I did, and he promised to come by my house and complete the repair that same day (Friday) if the weather cleared up a bit. If not, he promised to come out the next available clear day and that he would call/text me and my wife within an hour of when he was planning to arrive. After not hearing from him through the weekend, I texted on Tuesday morning, Nov. 20, and received no response. I called his number from my cell phone twice and left messages, but still received no response. Later that afternoon, I called Robert from my work number and he answered immediately, but once I identified myself, he apologized and said he had been really busy and that he would get out to my house "later today, or definitely by tomorrow." Again, he promised to text me and my wife when he was en route. Of course, we never heard from him. Now, it is Dec. 4 and I have called Robert 4 more times from 3 separate phone numbers and have left voicemails, but have received no calls back. I also sent him a text message the morning of Dec. 3 and received no text back. I have all e-mails and text messages saved VERY UNPROFESSIONAL. Would give 0 starts if it were possible. ***UPDATE*** His response that it was a separate roof isa complete lie. I reported him to Better Business Bureau due to his unprofessional practices. Again, Rob NEVER returned any phone calls or even offered an explanation. I had to call from multiple different numbers just to reach him because if he recognized my number he'd either block or ignore it. When I did get him on one of the alternate number he'd hem and haw, over up excuses of being so busy, then promise to come later that week and NEVER showed up. It's obvious that the past Google reviews have hurt his business and he taken to responding just in the last 3 months or so. And I'm sure he's encouraging friends and neighbors to counter the negative reviews with positive ones. I hope the people who gave 4 or 5 stars actually got good service. Good for them if they did. I hope it lasts because if there is an issue, they probably will never hear back from him again.
Nick Gassaway
Nick Gassaway
Robert was quick to respond and was able to get his crew out the next day. They were early and got it done in just a few hours.
All roofing materials will eventually deteriorate and erode, especially in harsh sun and weather conditions. However, you can absolutely extend the life of your roof with proper maintenance. The mistake most homeowners make is to ignore small repairs as needed. A missing shingle takes little time and costs to fix; but ignoring that missing shingle may allow water to seep in, debris to accumulate and pry other shingles loose, or damage to affect the underlayment. Taking care of small problems can prevent larger problems for decades.
This really comes down to preference, and in some cases, your HOA rules! While tile roofing materials have traditionally been longer-lasting, newer asphalt shingle products have proven to be nearly as durable, as well as often easier to repair. Tile and asphalt shingles have differences in price, weight, longevity, and care requirements – so we definitely recommend talking to a licensed roofing contractor just like “Garrison Roofing” about which is best for you. Still, you can expect a quality asphalt shingle roof to last for 25 years or more.
Periodic visual self-inspections and annual professional roof inspections are invaluable to a homeowner. As discussed, a small problem can become a major issue if not addressed. Regular inspections allow you to make minor repairs before they become larger projects and before a small leak becomes a major leak or a mold issue.
New Roof costs depend on a lot of factors: materials, contractor doing the work, size of the house, location of the home or building, and labor fees. To get a good estimate of how much you will need to install a new roof, ask for proposals from reputable contractors like Garrison Roofing; this can also help you choose a contractor that can work on the project that suits your budget.

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