Silicone Restoration Over Spray Foam in Northglenn
Project Overview
- Location: Northglenn, CO
- Building Type: Commercial retail building
- Size: 8,300 sq ft
- Roofing System: High-solids silicone coating over repaired spray polyurethane foam
- Duration: 4 weeks
- Completed: October 2024
- Manufacturer: American Standard Coatings (ASC)
- Warranty: 20-year manufacturer warranty
Roof Condition
This Northglenn commercial building had an aging spray foam roof with rooftop HVAC units. The foam had bubbled and blistered in several areas and the old surface was weathered.
- Aging spray foam roof with rooftop HVAC units
- Foam bubbled and blistered in several areas
- Old surface was weathered
Evaluation & Approach
Most of the foam was still sound, so replacing the whole roof would have thrown away good insulation. Cutting out only the failed foam fixes the weak spots, and silicone over everything makes one seamless, waterproof, reflective surface. The building stayed open during the work.
Why This Approach
- Most of the foam was still sound
- Cutting out only the failed foam fixes the weak spots
- Silicone over everything makes one seamless, waterproof, reflective surface
- The building stayed open during the work
- No tear-off, with a 20-year manufacturer warranty
Scope of Work
- Wash and Prep: Washed and prepped the full roof.
- Foam Repair: Cut out about 300 sq ft of blistered foam and sprayed new foam into those areas.
- Silicone Over New Foam: Applied high-solids silicone over the new foam.
- Full Roof Coating: Coated the entire roof and up the walls to the metal cap with high-solids silicone.
Result
Warranty: 20-year manufacturer warranty
- Blistered Areas Rebuilt: About 300 sq ft of blistered foam cut out and rebuilt with new foam
- 8,300 SF Sealed: 8,300 sq ft sealed under one seamless white membrane up to the wall caps
- No Tear-Off: Most of the foam was still sound, so the roof was restored without a tear-off
- 20-Year Warranty: The restored roof carries a 20-year manufacturer warranty