Do SIPs walls cost more than frame walls?
Generally speaking, a little more. The materials definitely cost more, but labor savings should partially offset any increase. But SIPs can be competitive if the design is optimized to incorporate them. That means doing things like designing house dimensions at two-foot and four-foot increments, pitching roof SIPs up at steeper angles to include loft square footage, and similar adjustments. A number of builders scattered around the country use SIPs for their entry-level housing products. Builders who repeatedly use SIPs have figured out ways to minimize any cost difference.
