Builders should consult the siding manufacturer’s installation instructions for how to attach their product to SIPs. Because SIPs use very little solid lumber, an increased fastening schedule is often required when attaching exterior cladding.
If the siding manufacturer does not offer recommendations for attaching their product to SIPs, a licensed architect or engineer can calculate the appropriate fastener frequency by obtaining fastener pullout capacities from the SIP manufacturer.
It is also important that proper moisture management procedures be followed when applying any type of cladding to SIPs. The Builder’s Guide to Structural Insulated Panels (SIPs) provides details for attaching various types of cladding materials. With the exception of metal and vinyl siding, the Builder’s Guide recommends that all claddings be installed with a drainage gap between the cladding and the weather resistant barrier in climates that average more than 20 inches of annual rainfall.