How often should you inspect and refresh bathroom caulk and grout?

Skipping it eventually leads to water damage or an expensive repair.

Staying on schedule matters beyond the repair bill: a consistent maintenance record is one of the factors in a home's Roots Home Health Score, and well-kept homes typically sell faster and closer to asking price.

How to do it

Caulk and grout are the waterproof seal around tubs, showers, and sinks. Once they crack or pull away, water wicks behind the tile and into the wall, where it rots framing and grows mold unseen.

1. Inspect the caulk lines at the tub-wall joint, shower corners, and around the sink for gaps, cracks, or mildew.
2. Cut out failed caulk, clean and dry the joint completely, and lay a fresh bead of mildew-resistant silicone.
3. Check grout lines for cracks or missing sections and regrout as needed.
4. Seal the grout once cured to slow future water absorption.

Alternatives & optional extras

• Mildew-resistant kitchen-and-bath silicone lasts far longer in a wet joint than acrylic caulk.
• Persistent mold coming back through fresh caulk means water is getting behind it; find the source first.

Time: ~1 hour · Typical cost: $8–$20 for caulk and sealer

What you'll need

• Mildew-resistant silicone caulk
• Grout sealer

If you skip it

Failed caulk and grout let water wick behind the tile and into the wall, rotting framing and growing hidden mold.

Other bathrooms (caulk & fixtures) maintenance

• Check toilet supply lines, shutoffs, and flappers — once a year

Related systems to keep on schedule

• Sump pump — start with: test sump pump operation, every 3 months
• Water softener — start with: check and refill water softener salt, once a month
• Water filtration system — start with: replace water filtration cartridges, every 6 months
• Septic system — start with: pump septic tank, every 3 years