Dow Insulating Exterior Wall Sheathing

On tuff r insulation one facer is a continuous sheet of aluminum foil.

Dow insulating exterior wall sheathing.

Exterior steel stud walls in commercial applications walls ceilings and roofs for commercial residential and. Exterior sheathing can be loosely grouped into two categories. What s the best way to install foam insulation on the outside of a wall. 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.

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. 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. The other is a tri plex facer consisting of a three ply laminate of durable kraft. 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.

Exterior sheathing is a board or panel that may be made of several different materials. 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. Extruded polystyrene foam insulation like styrofoam brand residential sheathing is inherently resistant to moisture which can wreak havoc on other building materials. 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.

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. Concrete slab insulating over slabs helps reduce the potential for condensation or sweating reduce energy loss and increase the warmth of the homeowner. The glass fiber reinforcement contributes to improved fire performance and dimensional stability. 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.

Moisture can compromise the performance of cavity insulation and damage drywall wood framing and osb or plywood sheathing. Thermax sheathing or styrofoam brand extruded polystyrene foam insulation offers a quick and effective alternative for insulating and sealing rim joists.