Hello!
As a novice, I've been pondering the risk of cold air leaking in and warm air leaking out of the house.
We recently had an air-to-air pump installed. The installer made a hole in the exterior wall (wood paneling) and ran insulated pipes, etc., through it. They sealed it from the outside with some kind of latex sealant and did the same on the inside.
There is a small draft that you can feel if you hold your hand next to the hole. Should I seal further from the inside and/or outside with more latex sealant? Would it be better with foam sealant? I've seen that some people use pipe-in-pipe solutions when making penetrations in the facade?
Similarly, I'm wondering about when making holes in the ceiling, for example, to install lamps or fix sliding wardrobe doors, etc. If there's a vapor barrier towards the attic that you make holes in, it would allow warm air to leak up into the attic, potentially causing condensation? Should one use latex sealant in such holes before screwing into them?
House from around 2010 made of wood with loose insulation in an uninsulated attic. Placing the thread under "construction techniques" for lack of better knowledge.
Regards
