Dow Insulating Exterior Wall Sheathing

Moisture can compromise the performance of cavity insulation and damage drywall wood framing and osb or plywood sheathing.

Dow insulating exterior wall sheathing.

Exterior sheathing can be loosely grouped into two categories. On tuff r insulation one facer is a continuous sheet of aluminum foil. Thermax sheathing is designed for use as continuous insulation in both interior and exterior applications to assist in meeting and exceeding both the most current iecc and the ashrae 90 1. Exterior sheathing is a board or panel that may be made of several different materials.

Thermax sheathing is approved for use per section 2603 5 of the international building code in exterior walls of types i ii iii and iv construction. To serve as a drainage plane the seams in the foam sheathing must be properly taped with sheathing and flashing tapes to provide continuity of the drainage plane at. It s installed over the exterior walls of the home and can have several purposes from lending structural support to helping to insulate the home. Exterior steel stud walls in commercial applications walls ceilings and roofs for commercial residential and.

Tuff r polyisocyanurate insulation consists of high performance high r value closed cell polyisocyanurate foam core boards sandwiched between a choice of durable exterior foil facers. Updated on july 20 2015. Thermax sheathing or styrofoam brand extruded polystyrene foam insulation offers a quick and effective alternative for insulating and sealing rim joists. Structural sheathing and non structural sheathing.

The other is a tri plex facer consisting of a three ply laminate of durable kraft. Although gba has published many articles and videos on the topic we continue to receive frequent questions from readers asking how to install rigid foam sheathing on exterior walls so it s time to provide a primer on the topic. The glass fiber reinforcement contributes to improved fire performance and dimensional stability. Extruded polystyrene foam insulation like styrofoam brand residential sheathing is inherently resistant to moisture which can wreak havoc on other building materials.

What s the best way to install foam insulation on the outside of a wall. When rigid foam insulating sheathing is installed on the exterior walls of a home the foam can serve as a drainage plane taking the place of house wrap for time and cost savings.