In this episode of The Build Show, Mike of Greenside Design Build takes us inside one of their custom homes during the insulation phase. Mike breaks down the full “flash-and-batt” system—closed-cell spray foam paired with Rockwool mineral wool—and explains how they’re using it not only on exterior walls but also throughout key interior partitions to dramatically improve sound control. He demonstrates the difference Rockwool’s Safe’n’Sound insulation makes by comparing untreated and treated areas, showcasing how effectively it reduces echo and noise transfer. Mike also walks viewers through a clever temporary framing setup that allows crews to safely access and spray a challenging roof section above an open stairwell. He wraps up by sharing why Rockwool is their preferred mineral wool option on this project, emphasizing that while multiple brands exist, the product’s performance is consistently excellent. As always, Mike reminds viewers that expert knowledge leads to expert results.

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