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

Great Insulation

Would Recommend

I love the easiness and workability of the insulation. But to mention the R-7.7 value!

Was this Review Helpful ?

perfect for a DIY spa cover

Would Recommend

Spa covers are expensive and break down and get water logged way too quickly based on what you pay for them. I can use 2 sheets of this, a roll of duct tape and some velcro and my spa is covered and got whenever I want to use it. I use the good Nashua 557 duct a wrap it around the edges 3 whole times, once down the center of the edge and once down each corner, it seals in all the Styrofoam and makes the edges stronger so it lasts. no you can't sit on top of it, but for $50 dollars it does th...

Was this Review Helpful ?

Great for modeling terrain of all kinds

Would Recommend

Aside from the fact that this foam will eventually destroy our planet unless something else does so first, it serves my purpose perfectly. I have no idea if it insulates well, and I don’t care. But as a model railroader I have found it to be perfectly suited to the building and carving of land masses.

January 1, 2022
From R- 7.7 , 2-in x 4-ft x 8-ft Faced Expanded polystyrene Board Insulation Verified Purchaser
Was this Review Helpful ?

Exactly what you expect

Would Recommend

This foam board is easy to cut and handle. Despite light weight, still surprisingly strong. I was able to walk on it without denting the surface.

December 22, 2021
From R- 7.7 , 2-in x 4-ft x 8-ft Faced Expanded polystyrene Board Insulation Verified Purchaser
Was this Review Helpful ?

Cuts easy, installs fast.

Would Recommend

Light weight makes it easy to handle and install. Hard to find, closest I could find it was 2 1/2 hours away.

November 13, 2021
From R- 7.7 , 2-in x 4-ft x 8-ft Faced Expanded polystyrene Board Insulation Verified Purchaser
Was this Review Helpful ?

R-tech is great, but not what I received

Curbside pickup, I was given a different brand product. A lot of nicks and damage on the foam. Fragile.

Was this Review Helpful ?