Do you know how to caulk—or even what caulk is? It’s something you rarely notice, but there it sits every day doing some pretty important work in your home. Once applied, this thin line of goo hardens ...

Q: There’s a lot of contradictory advice on the internet about caulking. In particular, some sites are quite explicit that metal/wood junctions should not be caulked. I have a door-sized window where ...