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Johns Manville RetroPlus 1/2 in. x 4 ft. x 4 ft. Roof Board
Regular price $10.23Orders start at $399 — combine any items to reach the minimum. Learn more
Johns Manville RetroPlus 1/2 in. x 4 ft. x 4 ft. Roof Board
This is a Johns Manville RetroPlus roof board, a 1/2 in. thick perlite-based roof board in a 4 ft. x 4 ft. panel for commercial low-slope roofing assemblies. One sell unit is a single panel. It is used as a retro-fit roof board under roofing membranes and pairs with Johns Manville roofing systems components.
Key Features:
- Retro-fit sizing: Compact 4 ft. x 4 ft. panel is sized for reroofing and retrofit applications.
- Code listed: UL Classified, FM Approved, and Miami-Dade County Approved.
- ASTM standard: Meets ASTM C728, Type 3.
- Light handling weight: Gross weight of approximately 8.85 lb per panel for easier handling on the roof.
- Cover board use: Part of the JM roofing insulation and cover boards lineup for membrane roofing systems.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | Johns Manville |
| Manufacturer model | 90002007 |
| Sell unit | 1 panel, 1/2 in. x 4 ft. x 4 ft. |
| Product line | RetroPlus Roof Board |
| Dimensions | 4 ft x 4 ft, 1/2 in. thick |
| Thickness | .5 in. |
| Coverage per unit | 16 sq ft per panel |
| Material | Perlite roof board |
| Approvals | UL Classified; FM Approved; Miami-Dade County Approved; ASTM C728, Type 3 |
| Weight | 8.85 lb gross per panel |
| Intended use | Commercial low-slope roofing insulation/cover board |
Coverage & How Much You Need:
Each 4 ft. x 4 ft. panel covers 16 sq ft of roof area. Divide the roof area by 16 to estimate panel count; order about 5% extra for cuts and fit-up.
Fit and Compatibility:
Designed for use in Johns Manville commercial roofing assemblies under JM roofing membranes. Fasteners, plates and adhesives are sold separately; consult JM system specifications for attachment requirements.
Frequently Asked Questions (FAQ):
Q: What is included in one order?
A: One 1/2 in. thick, 4 ft. x 4 ft. RetroPlus roof board panel.
Q: How many panels do I need?
A: Each panel covers 16 sq ft; divide your roof area by 16 and add a cutting allowance.
Q: Is this board code approved?
A: Yes, it is UL Classified, FM Approved, and Miami-Dade County Approved and meets ASTM C728, Type 3.
Q: What holds the board in place?
A: Attachment is by the roofing system design, typically mechanical fasteners and plates or approved adhesive, sold separately per the JM specification.
Q: How much does each panel weigh?
A: The listed gross weight is approximately 8.85 lb per panel.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
RetroPlus is JM's perlite roof board geared toward retrofit work, and the 4x4 format reduces breakage and handling strain compared with larger boards. Confirm board acceptance and attachment pattern in the specified JM assembly before ordering, and stage boards flat and dry on the roof. Perlite boards should be protected from moisture before the membrane is installed.
Follow OSHA fall protection requirements when working on commercial roofs and lift panels properly to avoid back strain.
Order the Johns Manville RetroPlus 1/2 in. 4 ft. x 4 ft. roof board for your next retrofit roofing project.
Product Documents:
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