Elevate Tapered Polyiso Insulation Board 4 ft. x 4 ft. Panels, Multiple Slopes and Thicknesses

This is Elevate tapered polyisocyanurate insulation board, sold by the sheet in 4 ft. x 4 ft. panels with several slope and thickness combinations. It is used to create positive drainage on low-slope roofs beneath the membrane. Choose the slope and thickness range your roof design calls for.

Key Features:

• Multiple slopes: Slope options include 1/8 in./ft. and 1/4 in./ft. panels across the family.
• Range of thicknesses: Thickness ranges span roughly 1/2 in. to 2-1/2 in. depending on the variant.
• 4 x 4 panels: Standard panels measure 4 ft. x 4 ft., giving 16 sq. ft. per sheet on most variants.
• Polyiso core: Boards are made of polyisocyanurate foam insulation.
• 480 sq. ft. pack: The 1/4 Y variant is quantified at 480 sq. ft. per unit.
• Positive drainage: Tapered panels build slope toward drains and gutters on flat decks.
• Per-sheet ordering: Each variant sells by the sheet.

Specifications Table:

Coverage & How Much You Need:

A 4 ft. x 4 ft. tapered panel covers 16 sq. ft.; the 1/4 Y variant is quantified at 480 sq. ft. per unit. Size the job from a tapered design layout, counting panels needed to reach each drain and valley.

Fit and Compatibility:

Elevate tapered polyiso installs over roof decks or base insulation beneath low-slope membranes, including Elevate (Holcim) membrane systems sold separately. Confirm attachment and adhesive compatibility with the specified membrane system.

Frequently Asked Questions (FAQ):

Q: What slope options are available?
A: The family includes 1/8 in./ft. and 1/4 in./ft. slope panels, with variants such as 1/8 in. A, AA, B and C and 1/4 in. X and Y.

Q: What panel size is standard?
A: Most variants are 4 ft. x 4 ft. panels covering 16 sq. ft. each; the 1/4 Y item is quantified at 480 sq. ft.

Q: How do I choose thickness?
A: Each variant has a thickness range, for example 0.5-1.5 in. or 1.5-2.5 in.; match the range to the low point and high point of your tapered design.

Q: What is the board made of?
A: Polyisocyanurate foam insulation.

Q: Where is it used?
A: On low-slope roofs to build slope for drainage under the roofing membrane.

Q: Is membrane included?
A: No, membranes and attachment products are sold separately.

Expert Verdict — Reviewed by the SuperArbor Pro Desk

Tapered polyiso solves ponding water by building slope toward drains, scuppers and valleys. Select the slope (1/8 or 1/4 in./ft.) from your drainage design, then pick the thickness range variant that hits the low-point minimum at the drains. Lay panels so the taper runs downhill and stagger joints from the layer below.

Use fall protection on low-slope roofs and keep panels dry and flat before installation.

Choose the Elevate tapered polyiso slope and thickness your roof design needs and order by the sheet.