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

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

4.5
278
See Product Details
209 Questions
Read All Questions & Answers

Can this be used under concrete basement slab


This is the lowest psi board they make and is only psi of 10. You don't want less than a 25 psi or type IV foam board under a slab. So I would say No this is not a good choice for an under slab installation. You need to move up to a type IV or better compressive strength.

Was this Answer Helpful ?