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Johns Manville DynaKap FR T1 Mineral-Surfaced Cap or Flashing Sheet, White, 39-3/8 in. x 32 ft. 10 in. Roll
Regular price $157.00Orders start at $399 — combine any items to reach the minimum. Learn more
Johns Manville DynaKap FR T1 Mineral-Surfaced Cap or Flashing Sheet, White, 39-3/8 in. x 32 ft. 10 in. Roll
DynaKap FR T1 is a premium fiber glass/polyester reinforced, mineral-surfaced cap sheet for multi-ply roofing systems, supplied as a 39-3/8 in. x 32 ft. 10 in. roll in White. Its SBS-blend sheet with ceramic-coated granules embeds well and resists fire with added FR additives. Use it as a cap sheet or flashing sheet in BUR and modified bitumen assemblies.
Key Features:
- Dual reinforcement: Combines the tensile strength, toughness and puncture resistance of a polyester mat with the dimensional stability and lay-flat of fiber glass.
- Fire-retardant blend: The FR blend contains additional fire-retardant additives.
- Elastic and flexible: Elongation and recovery properties accommodate continual roof expansion and contraction.
- Strong embedment: Specifically engineered for optimal embedment in the SBS-blend sheet.
- Long-term adhesion: Ceramic coating on the granules promotes excellent long-term adhesion.
- White granules: White mineral surface; Black granules are also available in the line.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | Johns Manville |
| Sell unit | 1 roll, 39-3/8 in. x 32 ft. 10 in. |
| Product line | JM BUR & MB Systems |
| Available colors | White (Black also available in the DynaKap FR T1 line) |
| Material | Fiber glass/polyester reinforced SBS-blend sheet, mineral-surfaced |
| Dimensions | 39-3/8 in. x 32 ft. 10 in. |
| Finish / texture | Ceramic-coated mineral granules |
| Thickness | T1 |
| Intended use | Premium cap sheet or flashing sheet in multi-ply roofing systems |
| Performance | Elongation and recovery for roof expansion/contraction; FR blend with fire-retardant additives |
Coverage & How Much You Need:
Each 39-3/8 in. x 32 ft. 10 in. roll covers roughly 108 sq. ft. of wall or roof surface before laps; size the job on roll length and the side and end laps required by your spec.
Fit and Compatibility:
Designed for multi-ply BUR and modified bitumen systems, engineered for optimal embedment in SBS-blend sheets. Pair with compatible SBS-modified asphalt adhesives or mopping bitumen; White and Black granule options are available in the series.
Frequently Asked Questions (FAQ):
Q: What is the sell unit?
A: One roll measuring 39-3/8 in. x 32 ft. 10 in. in White.
Q: Where is this sheet used?
A: As a premium mineral-surfaced cap sheet or flashing sheet in a variety of multi-ply roofing systems.
Q: What does FR mean here?
A: The FR blend contains additional fire-retardant additives beyond the standard product.
Q: Why the fiber glass/polyester mat?
A: Polyester provides tensile strength, toughness and puncture resistance while fiber glass adds dimensional stability and lay-flat characteristics.
Q: How does it handle temperature movement?
A: Its elongation and recovery properties accommodate the continual expansion and contraction experienced on all roofs.
Q: Are other colors available?
A: Yes, DynaKap FR T1 granules are available in White or Black; this listing is White.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
This FR-grade cap sheet is a good pick where fire performance and dimensional stability matter in a multi-ply assembly. Its polyester-plus-glass mat resists puncture while staying flat, which helps at laps and flashings. Plan laps per your project spec and use compatible SBS-modified asphalt to fully exploit the ceramic-coated granule embedment; choose Black where aesthetics call for it.
Follow the roofing system manufacturer's application requirements, including substrate temperature limits and safe handling of hot asphalt or torch-grade materials.
Add the Johns Manville DynaKap FR T1 cap sheet to your multi-ply roofing job today.
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