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Johns Manville GlasKap Cap Sheet White Roll for Low-Slope Built-Up Roofing
Regular price $50.50Orders start at $399 — combine any items to reach the minimum. Learn more
Johns Manville GlasKap Cap Sheet White Roll for Low-Slope Built-Up Roofing
Johns Manville GlasKap is a white cap sheet for low-slope built-up roofing assemblies, supplied as a 1-square roll. It serves as the top layer of the roof system, installed over compatible base and interply sheets. Pair it with Johns Manville GlasPly felts and approved roofing asphalt for a complete BUR assembly.
Key Features:
- White surfacing: The white surfacing provides the finished top layer for built-up roofing membranes.
- One-square roll: Each roll covers approximately one roofing square, simplifying material takeoffs.
- BUR cap sheet: GlasKap is designed as the cap sheet in asphalt built-up roof assemblies.
- Glass reinforcement: The GlasKap line uses glass reinforcement as part of the Johns Manville roofing membrane family.
- Low-slope use: Intended for low-slope roofing where a membrane cap sheet is required.
- System pairing: Designed to work with Johns Manville base sheets and interply felts in a full system.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | Johns Manville |
| Sell unit | 1 roll, 1 square |
| Product line | Johns Manville GlasKap |
| Available colors | White |
| Available sizes | 1 square roll |
| Material | Asphalt roofing cap sheet with glass reinforcement |
| Coverage per unit | 1 square per roll |
| Intended use | Cap sheet for low-slope built-up roofing (BUR) membranes |
Coverage & How Much You Need:
One roll covers approximately 1 roofing square (100 sq ft). Plan your roll count from the field area of the low-slope roof, allowing for laps at seams and edges.
Fit and Compatibility:
GlasKap is installed as the cap layer over Johns Manville GlasPly base and interply felts with approved roofing asphalt. Base sheets, felts and asphalt are sold separately.
Frequently Asked Questions (FAQ):
Q: What is included in one order?
A: One roll of Johns Manville GlasKap white cap sheet covering approximately 1 square.
Q: How many rolls do I need?
A: Measure the roof area in squares and add rolls to cover laps and waste; each roll yields about 1 square.
Q: What is it installed over?
A: It is used as the cap sheet over compatible base and interply felts in a built-up roofing assembly.
Q: What color is it?
A: White, as listed for this item.
Q: Is adhesive included?
A: No, mopping asphalt or approved adhesive must be purchased separately.
Q: What applications suit it?
A: Low-slope roofs where an asphalt built-up membrane is specified.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
GlasKap is the finishing layer of a multi-ply BUR assembly, so order it together with the base sheet and interply felts to keep the system consistent. Verify the asphalt type matches the job slope and ambient conditions. Store rolls on end and protected from weather before installation.
Built-up roofing installation involves hot asphalt and hot work; follow fire safety practices and applicable codes on the roof.
Order Johns Manville GlasKap white cap sheet today to finish your low-slope built-up roofing system.
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