I've got a very old tiled shower stall that has grout rather than caulking
on the joints between the walls and the floor. The grout is breaking off and
I need to re-seal.
Should I remove the old grout and use caulk instead-- or try to re-grout?
If you re-grout, it will just come out again--maybe tomorrow, maybe in
five years. Chip out the old grout. Take a piece of the old grout to the
store and get some sanded caulk that matches the color. It'll last a long
Wipe with denatured alcohol, let dry. Wipe with full strength bleach
immediately before caulking (let it dry). Use silicone caulk.
Corners are caulked rather than grouted because walls/floors expand and
contract or move as house settles, which cracks grout.
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