Rigid Insulation With Plywood Sheathing

Insulated foam sheets are also used as an insulated sheathing underlayment for exterior siding.

Rigid insulation with plywood sheathing.

For these products the permeance will not change with increasing thickness. The glass fiber reinforcement contributes to improved fire performance and dimensional stability. 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 sheathing is made of a rigid plastic foam that is typically sold in 4x8 or 4x10 foot boards.

Keep in mind that any interior rigid insulating panel must be covered by a barrier. A common choice is drywall. Johns manville r panel rigid roof insulation board offers r values of up to r 23 6 providing high thermal efficiency. 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.

3 benefits of rigid foam sheathing. R panel is manufactured with a closed cell polyisocyanurate foam core bonded to fiberglass reinforced facers and designed for use over metal nailable and non nailable roof decks with a variety of membrane systems. Follow with a 2x4 frame wall and insulate it with batt insulation. 1 inch and 2 inch thicknesses are common.

The boards are available in several thicknesses and r values. 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. Omega ci is available in 4 x 8 sheets in 2 1 thickness contact laminators technical support for alternative thickness availability. Zip system r sheathing is the simple all in one structural panel with built in exterior insulation.

The panels provide a continuous energy efficient surface. Continuous rigid insulation is a construction solution that provides a thermally efficient building enclosure. Plywood has an r value of 1 25 and fiberglass batts have an r value of 3 14. For faced rigid insulation boards such as foil faced or glass fiber faced polyisocyanurate the permeance of the facing is often much lower than the permeance of the polyisocyanurate and will govern the overall permeability of the sheathing board.