An Easy Way to Block Foundation Vents

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The Short Version: Shielding the crawlspace from the coldest winds by blocking certain foundation vents seems to have helped warm up one of the corner rooms (and possibly the rest of the house). The tools are simple – a black trash bag and black duct tape  Gorilla Tape. I cut individual sections out of the trash bag, which I used to cover the vents. Then I taped them down with black duct tape.

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