Prices, Promotions, styles, and availability may vary. Our local stores do not honor online pricing. Prices and availability of products and services are subject to change without notice. Errors will be corrected where discovered, and Lowe's reserves the right to revoke any stated offer and to correct any errors, inaccuracies or omissions including after an order has been submitted.

R- 7.8 , 2-in x 4-ft x 8-ft Faced Polystyrene Board Insulation

Ratings & Reviews for Perma "R" Products R- 7.8 , 2-in x 4-ft x 8-ft Faced Polystyrene Board Insulation

4.5
278
Review
 4.5 out of 5
278 Reviews


92% Recommend this product

Ratings may include incentivized customer reviews.

What Customers Are Saying

The PolyPro Foam Boards provide effective insulation that is easy to install and suitable for DIY projects. Customers appreciated the 2-inch thickness, foil facing, and ease of cutting and shaping the boards. The insulation helped improve temperature and comfort levels in various spaces. However, some customers reported issues with damaged or defective boards, high prices, and excessive cleanup due to Styrofoam shedding. The R-value was also lower than competing products, and the boards may not be suitable for certain applications. Overall, the product is a decent insulation option, but customers should carefully consider their specific requirements before purchasing.

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

Easy to install

Would Recommend

Easy to install, helped to insulate my seasonal workshop.

May 5, 2026
Verified Purchaser
Was this Review Helpful ?

Great quality used to soften pool bottom

Would Recommend

Perfect for intended use

May 5, 2026
From R- 7.7 , 2-in x 4-ft x 8-ft Faced Expanded polystyrene Board Insulation Verified Purchaser
Was this Review Helpful ?

Insulation

Would Recommend

The styrofoam fit the bill for what I needed.

April 20, 2026
Verified Purchaser
Was this Review Helpful ?

Great for price

Would Recommend

Easy to use

April 1, 2026
Verified Purchaser
Was this Review Helpful ?

Would Recommend

I do not like your phone system. There is no number to call on your pick up parking places. Some folks DO NOT have Smart Phones and it's a real inconvenience for them.

Was this Review Helpful ?

Lowes Online order management is comical...

Ordered the Perma "R" 2" x4' x 8' product. Online data notes more than enough "available" to fill an order. Put $1k order in and 10 minutes later I get a call, Sorry Sir I only have "X" in the store. I note, that's fine, hold order and request stock to fill and ship when complete as a whole. I'm told, Sir I can't do that. I'm calling if its OK to short your order and then you can chase down finding stock at other locations. "WHAT kind of nonsense is this?" I get online stock counts maybe out of ...

March 27, 2026
Was this Review Helpful ?

Great service

Would Recommend

Thank you very professional and fast.

March 15, 2026
Verified Purchaser
Was this Review Helpful ?

Easy to use

Would Recommend

If you but the heated cutting tool this stuff is easy to use.

Was this Review Helpful ?

Overall good product

Would Recommend

Overall, this is a good product. Its light in weight and easy to cut to size. The slight issues i have with them is tbat they are easy to damage, they were delivered strapped together in packs of 10 and the strapping had damaged some of the sheets, also the moisture foil covering is easy to damage and hence lose the moisture continuity unless repaired with the aluminium foil tape.

February 23, 2026
From R- 7.7 , 2-in x 4-ft x 8-ft Faced Expanded polystyrene Board Insulation Verified Purchaser
Was this Review Helpful ?

Easy to cut to fit.

Would Recommend

Keeps the cold out and the heat in.

Was this Review Helpful ?

Lowe's overpromises delivery speed- days late.

Would Recommend

The product was fine. The delivery was late and sloppy (damaged)/

Was this Review Helpful ?

Great insulation

Would Recommend

Easy to use and great insulation

January 4, 2026
Verified Purchaser
Was this Review Helpful ?