Start by finding and fixing leaks around penetrations, top plates, rim joists, and window perimeters. Use tapes and gaskets designed for longevity, not just foam. A blower-door-guided approach reveals hidden gaps, and documentation gives contractors accountability while ensuring future trades respect your hard-won air barrier.
Prioritize insulation that maintains R-value when damp, resists pests, and fits your fire and acoustic needs. Dense-pack cellulose, mineral wool, and wood fiber boards shine, especially when paired with continuous exterior insulation that slashes thermal bridging and raises interior surface temperatures for greater comfort and fewer drafts.
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