Questions about repairing or filling holes, or about what types of holes are necessary or permissible (such as in joists). For questions about *making* holes, consider the 'drill' tag.

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How big a hole do I have to drill in concrete to embed rebar in it?

I have a concrete patio that I'd like to use as the foundation for a CMU wall. I'd like the CMUs to be tied into the patio slab with rebar. I get that the gist is to drill a hole in the slab, put ...
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How do you plug an unused hole as per the NEC for a liquid tight enclosure?

I have been looking for a way to seal a liquid tight product using Listed blanking plugs / Cap-offs or similar to comply with the NEC (US National Electrical Code). We wanted to use Conduit Entry ...
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How can I stop an in-the-wall air conditioner from leaking air into the home?

As far as I can tell, the air conditioner fits nearly perfectly in the hole, but there is considerable air leaking into the home through the bottom. I think it may be because of metal strips that line ...
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How can I patch a large hole in a metal bathtub?

My tub is rotting from the top and I'm not yet ready to replace it. Water collects along one of the short sides of the tub (not the end with the faucet, the opposite end) and that is rotting and now ...