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:

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.