Styrofoam is a brand of closed-cell extruded polystyrene foam (XPS), manufactured to provide continuous building insulation board used in walls, roofs, and foundations as thermal insulation and …

Browse polystyrene foam blocks suitable for sculptures, models, and event displays. Versatile crafting solutions available.

Since its invention in 1941, Styrofoam™ Brand extruded polystyrene (XPS) has built a rich, storied heritage as an innovative, sustainable building product – creating an entire insulation material category.

Foam board insulation can be used in many parts of your home to improve comfort and energy efficiency. It works great for areas like garage, camper/rv/trailer, and exterior sheathing.

Jun 24, 2026 · Discover what Styrofoam truly is in our guide. Clear up EPS vs XPS confusion, learn its composition, construction & packaging uses, pros, cons, recycling tips and key environmental …

Jul 8, 2026 · Styrofoam is made of styrene, a petroleum-based substance refined into a polymer called polystyrene. Through an extrusion process, 98% air is introduced to the plastic, creating a …

Shop insulation and accessories at Lowe’s to find panels for your next building project. These STYROFOAM Board Insulation are the most popular among STYROFOAM’s selection. While …

Find STYROFOAM building supplies at Lowe's today. Shop building supplies and a variety of building supplies products online at Lowes.com.

STYROFOAM™ is a registered trademark of the DuPont Chemical Company (“DuPont”) or an affiliated company of DuPont. The trademark covers a full range of extruded polystyrene building products …

The trademark Styrofoam by Dow Chemical Company is informally used (mainly US & Canada) for all foamed polystyrene products, although strictly it should only be used for "extruded closed-cell" …