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.

4x8 styrofoam insulation sheets

10 results

Energy Star Qualified

STYROFOAM 
Residential Sheathing R- 5 , 1-in x 4-ft x 8-ft Faced Polystyrene Board Insulation

Find My Store

for pricing and availability

4.4
31

Kingspan Insulation 
R- 5 , 1-in x 4-ft x 8-ft Unfaced Foam Board Insulation

Find My Store

for pricing and availability

4.6
90
Energy Star Qualified

STYROFOAM 
Residential Sheathing R- 3.9 , 0.78-in x 4-ft x 8-ft Faced Polystyrene Board Insulation

Find My Store

for pricing and availability

4.9
29

Kingspan Insulation 
R- 2.8 , 0.50-in x 4-ft x 8-ft Unfaced Foam Board Insulation

Find My Store

for pricing and availability

4.4
70

Kingspan Insulation 
R- 10 , 2-in x 4-ft x 8-ft Unfaced Foam Board Insulation

Find My Store

for pricing and availability

4.5
104
Energy Star Qualified

STYROFOAM 
Residential Sheathing R- 2.75 , 0.55-in x 4-ft x 8-ft Faced Polystyrene Board Insulation

Find My Store

for pricing and availability

4.1
30
Energy Star Qualified

STYROFOAM 
Residential Sheathing R- 4 , 0.75-in x 4-ft x 8-ft Faced Polystyrene Board Insulation

Find My Store

for pricing and availability

4.8
20

Kingspan Insulation 
R- 3.75 , 0.75-in x 4-ft x 8-ft Unfaced Foam Board Insulation

Find My Store

for pricing and availability

4.4
43