Hey all! I recently learned something interesting about my house, built back in 1987. It's a two-story structure that withstood Hurricane Hugo, but I was surprised to find that there's no OSB or plywood behind the vinyl siding—just pink foam board. I noticed there are metal X-straps, and I suspect there might be some structural wood in the corners. I want to know if anyone has insight into why a builder would opt for this approach. The previous owner is someone I knew, but her husband, who actually constructed the house, remains a mystery. I can't imagine he chose a cheaper route, but perhaps it was to enhance energy efficiency? I'd love to hear your thoughts!
2 Answers
It's possible the foam board was used as an insulator to boost energy efficiency. Just because you don't see traditional sheathing doesn't mean it’s not structurally sound; sometimes builders go for alternative materials for insulation purposes, especially in coastal areas. The X-straps also provide stability, so it might be a well-thought-out design for your region's requirements.
Yeah, insulation choices can get pretty creative! The pink foam might be there to comply with energy codes while also preventing moisture issues. It’s not uncommon in coastal builds. Still, I'd recommend checking if there's any solid wood framing behind that foam for added security, just to be safe.