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.

Expanded Polystyrene Board Insulation

7 results

Related Products

Add Insulation to Your Home With Foam Board From Lowe's 

When it comes to insulating your home, foam insulation board offers a versatile and effective solution. Perfect for DIY installation, insulation boards are resistant to moisture, making them ideal for a wide range of indoor applications. Commonly used as basement wall insulation, rigid foam panels are also great for garage walls and garage doors. These boards provide a high R-value, helping maintain comfortable indoor temperatures—even during extreme cold. Some types even double as sound barriers, reducing noise between rooms or floors.



Types of Rigid Foam Insulation

There are several types of rigid insulation boards to choose from. Expanded polystyrene (EPS) is a budget-friendly option that offers good thermal and sound insulation. Extruded polystyrene (XPS) is known for its superior moisture resistance, making it ideal for damp areas like crawlspaces. If you're looking for STYROFOAM™, note that it's a type of XPS insulation known for durability and performance in both above- and below-grade applications.



Premium Insulation Options

For the highest density and thermal performance, polyisocyanurate (polyiso) is a top-tier choice. Though more expensive, its high R-value per inch can be worth the investment—especially in energy-conscious construction. Most foam boards, regardless of material, come in the standard 4-foot by 8-foot sheet size, making them easy to cut and install based on your needs.



Shop for Your Next Project

Ready to insulate your home and improve energy efficiency? Shop at Lowe's for the foam sheeting you need to tackle your next basement, garage or crawlspace insulation project. With options for thermal performance, moisture resistance, and sound dampening, foam insulation boards offer a smart, cost-effective upgrade for any space.