Skip to content
Johns Manville APPEX 4.5M APP Modified Bitumen Cap Sheet, 1 Square Roll, Black or White
Regular price $124.25Orders start at $399 — combine any items to reach the minimum. Learn more
Johns Manville APPEX 4.5M APP Modified Bitumen Cap Sheet, 1 Square Roll, Black or White
The Johns Manville APPEX 4.5M is a torch-applied APP modified bitumen cap sheet for low-slope roofing, sold as a 1-square roll. It is available in Black and White. Install it as the top layer over an approved JM base sheet or interply, which are sold separately.
Key Features:
- Two colors: Offered in Black and White granule-surfaced finishes.
- Torch applied: Designed for torch application as a cap sheet.
- APP modified: APP-modified asphalt membrane for low-slope roof systems.
- One square per roll: Each roll covers 1 square (100 sq. ft.).
- Cap sheet role: Provides the weather-exposed surface of the roof assembly.
- Low-slope use: Classified as an APP modified bitumen membrane for low-slope roofing.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | Johns Manville |
| Sell unit | 1 roll, 1 square |
| Product line | APP Modified Bitumen Membranes |
| Available colors | ['Black', 'White'] |
| Product type | Torch-applied APP modified bitumen cap sheet |
| Coverage per unit | 1 square per roll |
| Application method | Torch-applied |
| Intended use | Cap sheet for low-slope modified bitumen roof assemblies |
Coverage & How Much You Need:
One roll covers 1 square (100 sq. ft.). Size your order from roof area plus a waste allowance for laps, seams and perimeter details.
Fit and Compatibility:
Pairs with approved Johns Manville base sheets and interplies in a JM modified bitumen system; base layers are sold separately.
Frequently Asked Questions (FAQ):
Q: What colors are available?
A: This family is offered in Black and White, each as a 1-square roll.
Q: What does one roll cover?
A: One square, approximately 100 sq. ft. of roof area before laps and waste.
Q: How is it installed?
A: It is a torch-applied cap sheet requiring trained professional installation.
Q: What do I need with it?
A: An approved JM base sheet or interply, sold separately, for a complete system.
Q: Is it suitable for low-slope roofs?
A: Yes, it is designed for low-slope modified bitumen assemblies.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
Choose Black for a conventional appearance and White when a lighter cap surface is preferred. Confirm torch system approval for the substrate, use JM-approved base plies, and verify the assembly's fire classification before ordering.
Torch application involves open flame; follow manufacturer fire-safety guidelines, local fire codes and keep extinguishing equipment on the roof.
Order Johns Manville APPEX 4.5M cap sheet rolls in Black or White for your low-slope roofing project.
All third party trademarks, including logos and icons, referenced on our website and product pages remain the property of their respective owners. Unless specifically identified as such, Arbor's use of third party trademarks does not indicate any relationship, affiliation, sponsorship, or endorsement between Arbor Home and the owners of these trademarks. Any references by Arbor Home to third party trademarks are to identify the corresponding third party goods.
