AFCAT FANFOLD UNDERLAYMENT

AFCAT FANFOLD UNDERLAYMENT

AFCAT

AFCAT FANFOLD UNDERLAYMENT

AFCAT FANFOLD UNDERLAYMENT

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The AFCAT Fanfold Underlayment is made from closed-cell polystyrene (XPS) with perforated facers on both sides. It is designed as a lightweight, easy-to-cut, and easy-to-install product, configured in fanfolded bundles with cut-n-fold hinges. Each bundle contains 24 individual boards, each measuring 14 inches wide by 4 feet tall. The overall dimensions of the bundle are 48 inches wide by 4 feet tall. This product is primarily used as a leveling board, providing insulation and moisture protection when installing new vinyl siding over existing siding.

Size: ¼” x 4’ x 48’ 
Color: Beige
Unit Type: (Bundle-1) (Pallet- 57)  (Truckload- 912)

 

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Durable Build

Engineered to last through extreme temperatures and tough conditions.

Energy Efficient

Helps lower heating and cooling costs by improving insulation performance.

Contractor Approved

Trusted by industry pros for residential, commercial, and industrial use.

Fast & Easy Install

Lightweight, flexible, and easy to cut DIY or pro, it’s hassle-free

Durable Build

Engineered to last through extreme temperatures and tough conditions.

Energy Efficient

Helps lower heating and cooling costs by improving insulation performance.

Contractor Approved

Trusted by industry pros for residential, commercial, and industrial use.

Fast & Easy Install

Lightweight, flexible, and easy to cut DIY or pro, it’s hassle-free

Questions About AFCAT?

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What type of insulation do I need for my project?

It depends on your space! Use reflective insulation for radiant heat, spray foam for airtight sealing, and fiberglass or board insulation for walls and attics.

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Is this insulation easy to install?

Yes! Most of our insulation products are DIY-friendly and also trusted by contractors for quick installs.

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How long does shipping take?

We ship fast—most orders arrive within 3 to 7 business days depending on your location.

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Do your products meet building code requirements?

Absolutely. All our insulation products meet or exceed industry standards and building code compliance.

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Can I return or exchange if it doesn’t fit my needs?

Yes, we offer a hassle-free return policy within 30 days of purchase. Just keep the product unused and in original packaging.