Dow Styrofoam Structural Insulated Sheathing

It offers a high r value r 3 at 0 5 inch.

Dow styrofoam structural insulated sheathing.

R 5 5 at 1 inch which in turn reduces energy consumption and greenhouse gas emissions. Thermax sheathing can be installed exposed to the. Extruded polystyrene foam insulation like styrofoam brand residential sheathing is inherently resistant to moisture which can wreak havoc on other building materials. Shop dow r 3 common.

Joints between panels are sealed with weathermate tape. Thermax sheathing specially designed to hold a class a fire rating. That s not thick enough for your climate so you shouldn t use sis. Moisture can compromise the performance of cavity insulation and damage drywall wood framing and osb or plywood sheathing.

Residential sheathing is an extruded polystyrene foam board with plastic facers on both sides. Structural lateral bracing and transverse loads good insulation performance and a water resistive barrier. The glass fiber reinforcement contributes to improved fire performance and dimensional stability. Builders can use inch r 3 panels to sheathe entire exteriors or 1 inch thick r 5 5 panels as shear panels on corners to match up with 1 inch foam sheathing on the rest of the exterior.

The styrofoam sis structural insulated sheathing from dow combines three functions in one product. 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. 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. Here s more information on structural insulated sheathing.

You can use either 1 5 inch of xps 1 5 inch of polyiso or 2 inches of eps. The glass fiber reinforcement provides improved fire performance and dimensional stability. Using styrofoam brand residential sheathing could lead to fewer callbacks resulting in an enhanced reputation for builders. Sis structural insulated sheathing combines a moisture resistant blue foil outside face a polyisocyanurate foam core and structural sheathing.

The one inch thick product has an r value of r 5 5.