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R- 2.9 , 0.75-in x 1.13-ft x 4.0-ft Unfaced Polystyrene Board Insulation

Ratings & Reviews for Perma "R" Products R- 2.9 , 0.75-in x 1.13-ft x 4.0-ft Unfaced Polystyrene Board Insulation

4.4
263
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Review
  4.4 out of 5
263 Reviews


93% Recommend this product

Ratings may include incentivized customer reviews.

What Customers Are Saying

The foam board insulation is generally easy to use and install, with effective insulation properties that help regulate temperature, especially in hot environments. While some customers found the boards to be a bit fragile, the product was appreciated for its versatility in various home improvement and DIY projects beyond just insulation.

Customer review summary generated by AI, including incentivized reviews.
263 Customer Reviews

Great for crafts!

 Would Recommend

This worked perfect for the small project idea I had.

April 8, 2026
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Simple Styrofoam boards

 Would Recommend

Works exactly as described and decent for the price. Insulation or other projects, light and easy to cut.

February 22, 2026
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Easy to cut apart!

 Would Recommend

Exactly what i needed without having too much or not enough.

February 19, 2026
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Perfect for its purpose

 Would Recommend

Just the right size to line a container being converted into a small wildlife shelter.

February 10, 2026
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Right price!

 Would Recommend

The price outweighs anything I might dislike about these products.

February 1, 2026
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STOP SENDING SURVEYS

STOP SENDING SURVEYS

February 1, 2026
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Is military discount gone?

Product seems fine. Just wondering why nothing on my entire order didn’t get the military discount. None of the items was on sale. I got verified by the cashier. But paid full price.

January 28, 2026
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Inexpensive

 Would Recommend

Worked for what I needed, and the price was right, but difficult to cut cleanly and fairly flimsy

January 14, 2026
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No problems.

 Would Recommend

Works as advertised. No problems.

January 9, 2026
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foam board

 Would Recommend

worked as expected

January 1, 2026
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Great product

 Would Recommend

Needed to temporarily replace a broken basement window. I use a heated foam cutter which makes trimming to size extremely smooth. These panels also make excellent seals for foundation vents.

December 13, 2025
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