Rigid Insulation Over Plywood Sheathing

Minimum nail length must accommodate sheathing and penetrate framing a minimum 1 inches.

Rigid insulation over plywood sheathing.

It s made up of several thin layers of wood or plys which are laid in opposite directions to one another. Zip system r sheathing is the simple all in one structural panel with built in exterior insulation. The exposed edges of the 3 layers of rigid insulation are to be sealed with another layer of membrane. I just saw a video from dupont that this is how they recommend the installation goes.

Plywood sheathing image credit. Featuring integrated moisture air and thermal protection zip system r sheathing completely reimagines traditional wall assemblies by streamlining exterior water air and thermal management. Plywood has an r value of 1 25 and fiberglass batts have an r value of 3 14. Forming plywood medium density overlay plywood.

Current pneumatic nailers have maximum fastener lengths. An additional layer of 1 2 plywood is proposed above the rigid insulation for attachment of asphalt shingles. Plywood is a frequently used material for external structural sheathing. The foam on the outside keeps the wood frame inside the.

Plus rigid foam insulation applied over the outside walls. This creates a much more stable and structurally sound sheath that can be used over the exterior. Osb sheathing tyvek house wrap 1 xps with taped seams vinyl siding my builder was going to put the xps foam directly over the sheathing and then was going to wrap the house over the top of the foam. We have a project that will have 1 1 2 rigid insulation installed above the 5 8 structural roof sheathing.

The exposed edges of the 3. 3 benefits of rigid foam sheathing. Cladding attachment over thick exterior rigid insulation background current building code does provide prescriptive means to attach cladding over exterior insulation table r704 3 note v. It adds up to a robust system.