Dow Styrofoam Structural Insulated Sheathing

Residential sheathing is an extruded polystyrene foam board with plastic facers on both sides.

Dow styrofoam structural insulated sheathing.

Styrofoam residential sheathing is an extruded polystyrene foam board with plastic film facers on both sides providing a long term insulating performance of r 5 per inch sizing this 1 in thick 4ft x 8ft residential sheathing has a tongue and groove edge treatment to help boards fit snugly against one another and ensure energy efficiency. Here s more information on structural insulated sheathing. Structural lateral bracing and transverse loads good insulation performance and a water resistive barrier. 0 55 in x 4 ft x 8 ft.

Thermax sheathing is a nonstructural rigid board insulation with a glass fiber infused polyisocyanurate foam core laminated between 1 0 mil smooth reflective aluminum faces. The one inch thick product has an r value of r 5 5. The glass fiber reinforcement contributes to improved fire performance and dimensional stability. The styrofoam sis structural insulated sheathing from dow combines three functions in one product.

That s not thick enough for your climate so you shouldn t use sis. It offers a high r value r 3 at 0 5 inch. Thermax sheathing is a non structural rigid board insulation consisting of a glass fiber infused polyisocyanurate foam core laminated between 1 0 mil smooth reflective aluminum facers on both sides. You can use either 1 5 inch of xps 1 5 inch of polyiso or 2 inches of eps.

There s a growing buzz among green and energy efficient builders about styrofoam sis a new structural insulated sheathing product from dow corporation that offers builders effective wall bracing significant r value and a functioning drainage plane in a single application of material. Extruded polystyrene foam insulation like styrofoam brand residential sheathing is inherently resistant to moisture which can wreak havoc on other building materials. Joints between panels are sealed with weathermate tape. Using styrofoam brand residential sheathing could lead to fewer callbacks resulting in an enhanced reputation for builders.

Moisture can compromise the performance of cavity insulation and damage drywall wood framing and osb or plywood sheathing. The glass fiber reinforcement provides improved fire performance and dimensional stability. Sis structural insulated sheathing combines a moisture resistant blue foil outside face a polyisocyanurate foam core and structural sheathing. Shop dow r 3 common.

Thermax sheathing specially designed to hold a class a fire rating.