Johns Manville Tapered FESCO Perlite-Based Cover Board, D4 (1.75"–2.25"), 2' x 4', 32 Sq. Ft. BundleTapered FESCO Perlite Cover Board, D4 2' x 4' Factory fabricated roofing cover board made from expanded perlite blended with binders and fibers for durable thermal performance. Pre cut tapered panels deliver positive drainage and efficient insulation for commercial roof systems. Key Features: Perlite Composition: Expanded perlite with selected binders and fibers for insulating efficiency Tapered Design: Pre cut to several slopes to promote drainage

Tapered FESCO Perlite Cover Board, D4 2' x 4'

Factory-fabricated roofing cover board made from expanded perlite blended with binders and fibers for durable thermal performance. Pre-cut tapered panels deliver positive drainage and efficient insulation for commercial roof systems.

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Key Features:

• Perlite Composition: Expanded perlite with selected binders and fibers for insulating efficiency
• Tapered Design: Pre-cut to several slopes to promote drainage and reduce ponding water
• Convenient Size: 2' x 4' panels in a 32 sq. ft. bundle; 4 pieces per bundle
• Thickness Range: D4 profile (1.75" to 2.25") for targeted build-up
• Tested & Listed: UL Classified, FM Approved, meets ASTM C728 Type 1

Please check the Product Data Sheet Here

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Specifications Table:

Specification	Details
Brand	Johns Manville
Product name	Tapered FESCO Perlite-Based Cover Board
SKU / Material Number	12620
Product number	JMCPERD4
Board dimensions	2' x 4'
Thickness	D4 (1.75" to 2.25")
Bundle coverage	32 sq. ft.
Pieces per bundle	4
Unit of measure	BDL
Item weight	48 lb
Style / Category	Roofing Insulation
Applicable standards	UL Classified; FM Approved; ASTM C728, Type 1
Description	Factory-fabricated insulation panel composed of expanded perlite with binders and fibers; pre-cut to several slopes for tapered applications

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Frequently Asked Questions (FAQ):

Q: What is the board made of?
A: It’s composed of expanded perlite blended with binders and fibers, forming a rigid roofing cover board.

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Q: What are the panel dimensions and coverage?
A: Each panel is 2' x 4'. A bundle covers 32 sq. ft. and includes 4 pieces.

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Q: What is the thickness of the D4 variant?
A: D4 panels range from 1.75 inches to 2.25 inches.

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Q: Is it approved for commercial roofing systems?
A: Yes. It is UL Classified, FM Approved, and meets ASTM C728 Type 1.

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Q: How does the tapered design help?
A: The pre-cut slopes facilitate positive drainage, helping minimize ponding water on the roof.

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Sculpted Slope, Streamlined Roof

This tapered board shapes a roof with quiet precision, guiding water with architectural intention. Its perlite core offers a refined, lightweight strength, while the D4 profile builds elegant elevation without bulk. Pair it with clean-lined membranes and metal edge details for a crisp, contemporary silhouette. It’s a subtle yet essential layer that elevates performance and the poetry of a well-finished roof.

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Choose Tapered FESCO today to achieve efficient roof drainage and proven thermal performance with trusted approvals.