Commercial Roof Replacement • Grand Junction, Colorado • Polyurethane Foam Roof • Completed by Five Guys Roofing
Grand Junction Roof Replacement: Tearing Off a Failing Foam Roof and Starting Fresh
At Five Guys Roofing, we completed this roof tear-off and replacement on a commercial office building in Grand Junction in September 2023. Some details have been generalized to protect the property owner’s privacy, while keeping the scope and process clear.
City
Grand Junction, CO
Property
Commercial office building
Roof Type
Polyurethane foam roof over ISO board
Service
Foam roof tear-off and replacement
Response Time
Scheduled visit
Time on Site
Multiple days (tear-off through final walkthrough)
Pricing and What Drives It
Quoted project total: $267,154. The primary cost driver for this project was the scope of a full tear-off and replacement across a large roof, including new insulation board, foam application, and a two-coat elastomeric coating system.
Project documentation included the signed proposal, a final conditional lien waiver, and a 10-year warranty certificate.
The Situation
The building owner contacted Five Guys Roofing after the existing foam roof, installed over fiber board, developed active leaks.
- Active leaks coming through the existing foam roof
- The foam roof was applied directly over aging fiber board
- The roof had reached the point where repair was no longer a reliable option
What Was Causing It
The identified cause was the age and condition of the existing foam-over-fiberboard roof system, which had broken down enough to let water in.
How We Verified the Roof Condition
Our Five Guys Roofing team verified the roof’s condition and prepared it for a full rebuild: clearing the surface, tearing off the existing system down to a solid substrate, and confirming weather conditions were right before foam application.
- Blocked off parking and secured the work area for safety and access
- Delivered a dumpster on site and tore off the existing roof system down to a substrate suitable for the new foam roof
- Hauled away all roofing debris and masked walls, transitions, and other affected areas ahead of foam application
- Monitored weather conditions closely throughout, since polyurethane foam roofing requires the right temperature and humidity to cure properly
Supporting documentation included the signed proposal and the project warranty certificate.
The Plan
The Five Guys Roofing scope for this job called for a full roof rebuild: tear off the existing system, install new insulation board, apply a closed-cell polyurethane foam roof, then finish with a two-coat elastomeric coating system.
Materials and Components Used
- Insulation: 3-inch ISO insulation board, fastened 6 per sheet
- Foam: NCFI 2.8 lb density closed-cell polyurethane roofing foam, applied at 1-inch thickness and tapered for drainage
- Coating: Protech FG50 white elastomeric roof coating, base coat and top coat, each at 1.5 gallons per 100 sq ft
- Adhesion: primer as needed
Step-by-Step Work
Removal and Preparation
We delivered a dumpster on site, tore off the existing foam roof system down to a substrate that the new foam roof could adhere to, and hauled away all debris. We masked and prepared walls, transitions, and other affected areas, and carefully lifted rooftop equipment as needed for foam application.
Insulation and Foam Application
We installed 3-inch ISO board across the roof, applying primer as needed to improve adhesion. We then applied closed-cell polyurethane foam at 1-inch thickness, tapering it from the peak of the slope to improve drainage and adding extra thickness over low areas. We detailed foam carefully at all roof penetrations, AC units, edges, and parapet walls, monitoring weather conditions throughout to keep the foam curing properly.
Coating, Cleanup, and Final Walk
We applied a base coat and a top coat of white elastomeric coating over the new foam roof, detailing around all penetrations, edges, and parapet walls. We repaired the missing wall cap coping, reinstalled roof drain covers, and cleaned the work area, hauling away all project debris before a final walkthrough.
Results
After completion, the building had an entirely new roofing system: fresh insulation board, a tapered closed-cell foam layer, and a two-coat elastomeric finish designed to seal the roof and stop the leaks the owner had been dealing with.
The property received a 10-year no-leak warranty from Five Guys Roofing, including workmanship coverage and manufacturer product warranty, plus a complimentary yearly roof inspection.
Before and After
A quick side-by-side recap showing the roof before the tear-off and after the new foam and coating system was installed.
FAQ
Why did this roof need a full replacement instead of a repair?
The existing foam roof, applied over fiber board, had aged to the point of active leaks and was no longer a good candidate for spot repair, so Five Guys Roofing recommended a full tear-off and replacement.
What caused this project to move forward?
The cause was the age and condition of the existing foam-over-fiberboard roof system, which had broken down enough to let water in.
What materials were included?
Materials included 3-inch ISO insulation board, NCFI closed-cell polyurethane roofing foam, and a two-coat Protech FG50 white elastomeric coating system.
What affects the cost of a foam roof replacement?
This project’s quoted total was $267,154. The specific driver identified was the scope of a full tear-off and rebuild, including insulation, foam application, and coating across a large roof.
Have more questions? Check out our FAQ page.
Dealing with a Leaking Commercial Roof in Grand Junction?
If your foam or flat roof is aging and starting to leak, a full tear-off and replacement may be more reliable than another round of patch repairs. Request an inspection and we’ll walk you through what we find and the most reliable path forward.
We do not publish addresses or property-owner-identifying details.
