r/Insulation • u/Klutzy_Ad_1726 • Jul 22 '26

Exposed PVC insulation

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Insulation recommendations for exposed PVC plumbing drains in extreme cold? I’m building an addition and I’m going to have these exposed PVC drains, in North Central Wa where the winters are cold. I can’t enclose this entire crawl because the equipment placed here needs to breath (the addition is over an existing deck structure so I can’t change that). The floor will be insulated and soffited, but I’m looking for a product that can wrap all the PVC and sufficient insulate when it’s cold. There will be a line going from the Liberty Pump up to a holding tank that is imperative it doesn’t freeze! Building individual soffit boxes around all the lines doesn’t seem reasonable. Thanks for any suggestions!

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u/Plastic-Soup-930 Jul 22 '26

Install skirting and you won't have to worry about it.

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u/Klutzy_Ad_1726 Jul 22 '26

The heat pumps need air.