Johns Manville SECUROCK Gypsum-Fiber Roof Cover Board 1/4 in x 4 ft x 4 ft

Johns Manville SECUROCK Gypsum-Fiber Roof Cover Board is a 1/4 in. thick, 4 ft x 4 ft glass-mat-free gypsum-fiber panel for low-slope commercial roofing. Its fiber-reinforced, homogeneous composition is strong and water-resistant through the core, giving exceptional wind uplift performance with no facer delamination risk. One panel covers 16 sq. ft.

Key Features:

• Homogeneous core: Fiber-reinforced, homogenous gypsum-fiber composition is strong and water-resistant all the way through, with no risk of facer delamination.
• Wind uplift: Homogenous composition achieves high wind uplift ratings in roofing assemblies.
• Adhered-system bond: Provides low absorption and an exceptional bond in adhered single-ply systems.
• Hail and foot traffic: Provides protection from hail and foot traffic when adhered with insulation adhesive.
• Mold and moisture: Resistant to moisture and mold.
• 97% recycled: Made from 97% recycled material, combining performance with sustainable design.
• Certified: FM Approved, Miami-Dade County Approved, UL Classified, and LEED applicable.

Specifications Table:

Coverage & How Much You Need:

Each 4 ft x 4 ft panel covers 16 sq. ft of roof area, so 100 panels cover roughly a 1,600 sq. ft (about 1.6 squares worth of board) area; order roof area in sq. ft divided by 16, plus waste.

Fit and Compatibility:

Used as a cover board over roof insulation beneath Johns Manville and other single-ply membranes (TPO, PVC, EPDM) in low-slope roofing systems, adhered with insulation adhesive or mechanically attached per the roofing system design. Insulation, adhesives, fasteners, and membranes are sold separately.

Frequently Asked Questions (FAQ):

Q: What is included in one order?
A: One 1/4 in. x 4 ft x 4 ft SECUROCK Gypsum-Fiber Roof Cover Board panel.

Q: How much does one panel cover?
A: Each 4 ft x 4 ft panel covers 16 sq. ft; divide your roof area by 16 and add waste to size the job.

Q: How is it installed?
A: It can be adhered with insulation adhesive over compatible insulation or set in a mechanically attached assembly, with membrane applied above per the roofing system specification.

Q: Is it water resistant?
A: Yes, the fiber-reinforced homogeneous composition is water-resistant through the core and resistant to moisture and mold.

Q: Does it help with wind and hail?
A: Its homogenous composition achieves high wind uplift ratings with no facer delamination risk, and it provides hail and foot traffic protection when adhered with insulation adhesive.

Q: What certifications does it have?
A: The board is FM Approved, Miami-Dade County Approved, UL Classified, and applicable to LEED projects.

Expert Verdict Reviewed by the SuperArbor Pro Desk

A 1/4 in. SECUROCK gypsum-fiber cover board is the standard choice between polyiso insulation and the single-ply membrane when you need wind uplift, hail, and foot-traffic protection without facer-delamination risk. Because the panel is homogeneous, adhered installs deliver an exceptional bond and low absorption; stagger joints and install per the membrane system specification to keep the FM or Miami-Dade approval valid. At 27 lb per panel it is easy to stage by hand on low-slope roofs.

Handle panels with gloves and follow the manufacturer’s data sheet and local code for adhesive use, hot-work restrictions, and roof access safety.

Upgrade your low-slope roof assembly with Johns Manville SECUROCK 1/4 in. gypsum-fiber roof cover board, 4 ft x 4 ft.

Product Documents:

• Installation Guide (PDF)
• Product Data Sheet (PDF)
• Safety Data Sheet (PDF)