How should wood siding be installed over rigid foam insulation.
Wood siding over rigid foam.
If it s clapboards then you re better off removing the siding installing plywood then the foam but if it s novelty siding which is probably likely then yes use the fabric but detail it as an air barrier which means that it will need to be sealed with a high quality caulk all around the edges.
How to install rigid foam under siding 1.
William costello is building a new house in southwest virginia that will be framed with 2x6s and will include up to 2 inches of exterior rigid foam insulation.
With foam sheathing an air space is essential both to reduce the siding s water uptake and to provide a receptor space for the moisture in the siding.
Siding over rigid foam a vented drainable air space keeps wood siding dry and stable.
Foam sheathing contribution to siding failures.
Contributing to moisture damage in wood clapboards nailed over foam is the observation that because the foam provides no support for the nails passing through it any movement in the wood such as due to thermal or moisture changes can cause the wood to loosen and drop out of alignment.
Set panels on the wall starting at one end of the house align the edges with the corner and bottom of the wall and.
Moisture protection and heat buildup.
When installing wood siding over rigid foam sheathing you must protect the siding from moisture and heat buildup and use proper nailing.
Measure the walls from top to bottom with a tape measure and buy either 4 by 8 foot or 4 by 9 foot sheets of rigid.