Rigid Insulation Over Plywood Sheathing

It adds up to a robust system.

Rigid insulation over plywood 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. We have a project that will have 1 1 2 rigid insulation installed above the 5 8 structural roof sheathing. An additional layer of 1 2 plywood is proposed above the rigid insulation for attachment of asphalt shingles. Forming plywood medium density overlay plywood.

Rigid insulation over roof sheathing jdgengineer structural op 13 aug 18 17 14. The exposed edges of the 3 layers of rigid insulation are to be sealed with another layer of membrane. This creates a much more stable and structurally sound sheath that can be used over the exterior. Current pneumatic nailers have maximum fastener lengths.

Featuring integrated moisture air and thermal protection zip system r sheathing completely reimagines traditional wall assemblies by streamlining exterior water air and thermal management. It s made up of several thin layers of wood or plys which are laid in opposite directions to one another. Plywood has an r value of 1 25 and fiberglass batts have an r value of 3 14. Plus rigid foam insulation applied over the outside walls.

Minimum nail length must accommodate sheathing and penetrate framing a minimum 1 inches. Plywood is a frequently used material for external structural sheathing. 3 benefits of rigid foam sheathing. Plywood sheathing image credit.

The exposed edges of the 3. Zip system r sheathing is the simple all in one structural panel with built in exterior insulation. 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. The foam on the outside keeps the wood frame inside the.