Carlisle SynTec Systems InsulBase Polyiso Roof Insulation Board – 316654;316703;316825 - image 1

Carlisle SynTec Systems InsulBase Polyiso Roof Insulation Board – 316654;316703;316825

Regular price $54.93

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Carlisle SynTec Systems InsulBase Polyiso Roof Insulation Board


InsulBase is a polyiso (polyisocyanurate) rigid foam roof insulation board from Carlisle SynTec Systems, used as a primary insulation layer in low-slope commercial roofing assemblies. Multiple model variants (316654, 316703, 316825) are available in this listing. Match thickness to your roofing system design before ordering.


Key Features:

  • Polyiso core: Rigid polyisocyanurate foam insulation board designed for low-slope roofing applications.
  • Roof system ready: Intended for use as insulation in commercial membrane roofing assemblies.
  • Multiple variants: Offered under multiple model numbers (316654, 316703, 316825), typically indicating different thicknesses.
  • Brand backing: Manufactured by Carlisle SynTec Systems, an established commercial roofing manufacturer.

Specifications Table:

Specification Details
Brand Carlisle SynTec Systems
Manufacturer model 316654;316703;316825
Sell unit 1 insulation board
Material Polyisocyanurate (polyiso) foam
Intended use Low-slope roof insulation

Fit and Compatibility:

Designed for use within Carlisle SynTec membrane roofing systems; confirm system compatibility and required thickness with the roofing system specification. Fasteners, adhesives, cover boards, and membranes are sold separately.


Frequently Asked Questions (FAQ):

Q: What is included in one order unit?
A: One InsulBase polyiso insulation board under the selected model number; confirm thickness and pack quantity with your order confirmation.


Q: Which thickness should I choose?
A: Thickness must match the R-value and assembly requirements of your roofing system design; the three model numbers correspond to different product variants.


Q: Can this be used on sloped roofs?
A: InsulBase is intended primarily for low-slope commercial roofing; follow the roofing system manufacturer's guidance for other applications.


Q: Is a warranty included?
A: No warranty terms are stated in the available sources; consult Carlisle SynTec Systems for system warranty details.


Expert Verdict — Reviewed by the SuperArbor Pro Desk

Polyiso boards like InsulBase are typically installed above the roof deck and below the membrane, with thickness selected to meet the project's R-value target. For a complete assembly, plan cover boards, fastening, and membrane attachment per the system spec. Because board thickness varies by model number, verify the exact variant before ordering.

Handle boards carefully and follow OSHA and manufacturer safe-working practices when installing insulation on rooftops.


Order Carlisle SynTec Systems InsulBase polyiso roof insulation board for your next low-slope roofing project.

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Subject to Approval & Availability
All orders are reviewed before fulfillment. You are not charged until your order is approved and ready to ship — and you may cancel at any time before that at no cost.

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