I've got a large hole behind my bathroom sink on the floor. Is there a easy but serious way to plug that hole, from which comes tremendous amounts of cold air?
Plugging large hole in bathroom floor
hole
Related Solutions
I realize that this is a U.S. reference, but you may be able to find a wall exhaust fan locally similar to this.
You need to find a unit that is intended for exposure to the outdoors. Also you may need a cover in the colder months if the unit you find does not have a self closing louver. The one depicted does.
If you use 110 voltage and 60cycles, you may be able to order something like this from the U.S. Otherwise, be sure that it matches your local electric supply.
How large is the hole exactly? If it's 16" or wider I would consider removing some drywall so that you could reattach the new drywall straight to the studs.
If the hole isn't that large, normally you would use two pieces of furring strip that will be 4 inches longer than the hole in the wall. The furring strip will serve as makeshift studs. Evenly space them apart so that the drywall will be stable when installed.
Measure 2" down from each end of the furring strip and mark it. When you place the strip inside the hole, align the strip so the mark you made is even on both sides. Using drywall screws, screw through both sides of the wall 1" from the mark you made (remember, you have 2" to place with). Repeat with the second furring strip. Once the strips are securely attached to the wall, screw the new drywall to the furring strip (use at least four screws).
Finish by applying compound or plaster (whatever your finish is), sand if necessary and paint.
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Best Answer
Get a can of expandable foam from your hardware store. If they have it get the one for extra large gaps. Also pick up a tub of ready mixed tile grout. If the hole is really deep the foam may fall through before it had time to expand so you may need to stuff some newspapers into the hole to give the foam some thing to rest on until it had time to set up. Get as thick a layer of foam in there as possible for insulation.
After it has set, trim it off half an inch below floor level and trowel in the grout mixture level with the floor.