Struggling with air leakage
Again, I thank you all for your helpful input. You combined experience is making me better at my job everyday!
I am really struggling when it comes to recommendations for homeowners about air sealing. For example, I did a blower door test for a customer which came back at 1,550 CFM. The minimum ventilation requirement (using .35 ACH) comes out to around 1,600 meaning that they shouldn’t seal any air leaks without installing a mechanical ventilation system. Yet they had significant air intrusion around a fireplace insert, and air leakage around the knee walls on their second floor are causing ice dams.
I feel like I’m stuck telling everyone I talk to that they need to install a mechanical ventilation system when that just doesn’t sound feasible. What am I missing?
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