Will insulating my basement make the house hotter in the summer?
Sorry if this has been asked before, I couldn’t find anything specific to my situation on the forums.
Our house has no AC, only a heater. The basement is honestly fine during the winter, not too cold at all for us.
It’s also the only room in the house that is even remotely bearable during the summer. It usually gets up to 30°C/86°F *inside* the house during the summer and it’s miserable. Our basement is unfinished at the moment, but my husband’s parents are insisting on insulating the basement walls. I understand it keeps the home warmer during the winter and will save money from needing to use our heater less, but I’m worried that because we have no inside source of cool air whatsoever and that the heat just fills the house so easily during the summer, that it’ll just make the heat upstairs even hotter? We were hoping to just stay in the basement during the summers for the most part once it has walls and is properly sealed because opening windows at night, using fans, etc does not help in any way upstairs. But now we’re concerned that the basement will just be warmer too and we honestly really like the current basement temperature year-round and don’t want that to change.
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