Rigid Foam Insulation Over Wood Siding

To secure the foam use two inch cap nails.

Rigid foam insulation over wood siding.

Some people use roofing nails but if a strong gust of wind gets under the siding it may not hold. Wood siding including cedar siding should be installed over an air space regardless of the type of sheathing used. It adds up to a robust system. Since foil faced foam is a moisture barrier it should be used with a continuous film vapor retarder on the inside wall.

Is replacing wood siding with vinyl and. Plus rigid foam insulation applied over the outside walls. This is especially true if the wall is filled with fiberglass batt insulation. He would like to keep it on and simply put the new rigid insulation over the siding.

Lp siding with fern strips over insulation. Gypsum sheathing up to 1 inch thick the foam sheathing and other non nailable substrates do not have nail holding capacity. One of the most asked questions on our site is related to this article. It seems this will create some nice air pockets which be.

How should wood siding be installed over rigid foam insulation. Always follow the manufacturer s instructions for installing rigid foam insulation. Readers are constantly asking if the rigid insulation is supposed to be installed over the building wrap or vice versa. Moisture protection and heat buildup.

How to install rigid foam under siding. What are the risks of installing cedar siding directly over foil faced rigid foam insulation should tar paper or housewrap be used as well. When applying james hardie siding directly over the combined thickness of foam sheathing continuous insulation and other non nailable substrates e g. Fit the rigid foam insulation snugly and seal all.

Of course i did this all knowing my warranty would be void. The foam on the outside keeps the wood frame inside the wall warm and dry in. When installing wood siding over rigid foam sheathing you must protect the siding from moisture and heat buildup and use proper nailing. Many houses built today have a double wall type of insulation with fiberglass batts fastened between the studs on the inside and rigid foam board over.

Siding over rigid foam. The nails have a plastic cap that keeps them from damaging the foam. The contractor has ripped off a few layers of asphalt siding and is now down to the original siding. Well call me half hazard.

Cover the house walls with 4 by 8 foot sheets of rigid foam insulation typically 1 2 to 1 inch thick nailed to wood sheathing with 1 1 2 inch broad headed galvanized nails every 16 to 18 inches. Rigid foam over building wrap.