Caulk Bathroom Tile and Tub Surround
Re-caulk around the tub, shower, and bathroom fixtures to prevent water damage behind walls.
DIY Cost
$15
If Ignored
$5k
Frequency
Twice a year
Difficulty
Easy DIY
Most homeowners can handle this in under an hour with basic tools.
How to do it — step by step
Inspect caulk around the tub perimeter, shower floor, and tile grout. Pink or black staining indicates mold; cracks or gaps mean water is getting behind the wall. Remove old caulk with a utility knife and caulk remover tool. Clean and fully dry the area. Apply 100% silicone caulk (not latex) with a steady hand or caulk gun. Smooth with a wet finger and let cure 24 hours before use. Water behind bathroom walls causes mold, structural rot, and can require a full wall tearout to remediate — a $5,000–$20,000 repair.
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