Attaching Siding To Rigid Insulation

An architect in the rocky mountain west puzzles over details on a house that is to have an exterior layer of rigid foam insulation and board and batten siding.

Attaching siding to rigid insulation.

Industry trend to using exterior rigid insulation increased thermal value condensation resistance increased air tightness possibly. Of 3 to 3 5 which limits insulation thicknesses to 1 5 max 3 5 fastener to siding 1 embedment 3 5 0 5 1 5 1 5 max. You ll need longer nails for nailing trim and siding. Some people recommend a layer of furring on the outside of the foam it that adequate to hold siding on.

You ll need to properly flash window and door openings. Almost any type of siding can be installed over the rigid foam cedar or redwood planks exterior plywood sheets cement fiber board or vinyl siding are common options. What are the risks of installing cedar siding directly over foil faced rigid foam insulation should tar paper or housewrap be used as well. A common choice is drywall.

Attach cladding over exterior insulation table r704 3. To help the siding installer know where the framing members are so as to attach the siding to the framing o transfer the frame layout directly from wall framing to each attachment of rigid foam insulation or o snap vertical chalk lines at each stud location after foam has been installed. By installing rigid foam board insulation on the exterior walls you ll need to pay special attention to the details. Use a premade kit for this type of project.

Keep in mind that any interior rigid insulating panel must be covered by a barrier. In a typical situation. With foam sheathing an air space is essential both to reduce the siding s water uptake and to provide a. His solution seems to be that people should be focusing on first anchoring the furring strip through the rigid insulation and sheathing into the stud with one nail and then using a much shorter nail or screw to attach the cladding to the furring strip.

It adds up to a. One new wrinkle for many builders is walls built with fiber insulation between the studs plus rigid foam insulation applied over the outside walls. Siding over rigid foam. Follow with a 2x4 frame wall and insulate it with batt insulation.

The object is to build in energy efficiency at a reasonable cost and stop thermal bridging as well as find the best means of attaching the siding to the house. Wood siding including cedar siding should be installed over an air space regardless of the type of sheathing used. Attach the tongue and groove insulation boards to the concrete wall with adhesive.