Rigid Insulation Over Plywood Sheathing

This creates a much more stable and structurally sound sheath that can be used over the exterior.

Rigid insulation over plywood sheathing.

An additional layer of 1 2 plywood is proposed above the rigid insulation for attachment of asphalt shingles. Plywood sheathing image credit. Minimum nail length must accommodate sheathing and penetrate framing a minimum 1 inches. Current pneumatic nailers have maximum fastener lengths.

Plywood is a frequently used material for external structural sheathing. The exposed edges of the 3 layers of rigid insulation are to be sealed with another layer of membrane. Featuring integrated moisture air and thermal protection zip system r sheathing completely reimagines traditional wall assemblies by streamlining exterior water air and thermal management. Rigid insulation over roof sheathing jdgengineer structural op 13 aug 18 17 14.

I just saw a video from dupont that this is how they recommend the installation goes. 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. The exposed edges of the 3. Zip system r sheathing is the simple all in one structural panel with built in exterior insulation.

Box beam gable framing new gable overhang is framed in the form of a box beam hanging off of a new layer of roof plywood roof sheathing cantilevered over the top of the 3 layers of rigid insulation. Forming plywood medium density overlay plywood. The foam on the outside keeps the wood frame inside the. Plus rigid foam insulation applied over the outside walls.

It adds up to a robust system. 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. It s made up of several thin layers of wood or plys which are laid in opposite directions to one another. More effective insulation with r values ranging from 3 6 to 8 0 rigid foam sheathing has much better insulation per inch than other materials i e.