When Should You Recaulk a Shower?

Short answer: You should recaulk a shower when the caulk is cracked, peeling, shrinking away from the tile, or stained with mold that comes back after cleaning. In Orlando's humid climate, shower caulk takes on more moisture than almost any other joint in the house, so it often needs replacing before the grout or tile shows any wear. Caulk is the flexible seal at corners and edges — once it fails, water can get behind your tile.

What Are the Signs Your Shower Caulk Has Failed?

• Gaps or hairline cracks where the tub or shower pan meets the wall.
• Peeling edges you can lift with a fingernail.
• Dark spots that keep coming back within days of scrubbing — mildew growing under or inside the caulk.
• Hard, chalky, or yellowed caulk that has lost its flexibility.
• Water stains or loose tiles near a corner or along the tub line.

If you see any of these, the seal is no longer doing its job, even if the shower still looks mostly clean.

Why Does Caulk Fail Before Grout?

Caulk sits in the joints that move. Where a wall meets a tub, a floor, or another wall, materials expand and contract at different rates. Tile industry guidance from the Tile Council of North America calls for a flexible sealant — not grout — at these changes of plane for exactly that reason. That constant flexing, plus daily hot water, soap, and cleaning products, wears caulk out faster than the grout lines on the flat wall. In older showers where grout was used in the corners instead of caulk, you will often see cracking right at those corners.

Can You Just Caulk Over the Old Caulk?

No. New caulk does not bond well to old caulk, soap film, or mildew, so a layer on top usually peels within months — and it can seal moisture and mold in behind it. A lasting recaulk starts by removing every bit of the old bead and getting the joint clean and dry.

What Does a Professional Shower Recaulk Include?

Our caulking and sealing service follows four steps:

1. Full removal of the old, failing caulk.
2. Surface prep — joints cleaned and dried to the manufacturer's specs.
3. Precision installation of premium, mildew-resistant caulk in a color-matched finish, tooled into tight, even lines.
4. Curing — the joint is left to set before the shower goes back into use. Most silicone caulks call for about 24 hours; your technician will tell you exactly when it's ready.

The same service covers tubs, kitchen counters and backsplashes, floor-to-wall transitions, door and window thresholds, and outdoor tile.

Is the Problem Caulk or Grout?

Caulk runs along corners and edges; grout fills the lines between tiles. If the grout between your wall tiles is crumbling, missing, or permanently stained, a recaulk alone won't fix the shower — you may need professional re-grouting as well. Our guide on how long shower regrouting takes walks through what that involves.

Frequently Asked Questions

How often should a shower be recaulked?

There is no fixed calendar date — it depends on how often the shower is used, how well it's ventilated, and the quality of the original caulk. The better rule is to inspect it every few months and recaulk as soon as you see cracks, peeling, or mildew that won't clean off. In humid Central Florida bathrooms, that point tends to come sooner than homeowners expect.

Is black mold in shower caulk dangerous?

Mold in caulk is usually growing into the material, not just sitting on top, which is why bleach rarely gets rid of it for good. The EPA advises fixing the moisture problem and removing moldy materials that can't be cleaned. For caulk, that means pulling it out and replacing it.

Can you match my existing caulk color?

Yes. We use color-matched caulk so the new lines blend with your tile and grout instead of standing out as a bright white stripe.

The Grout Restorer has cared for showers in Orlando and across Central Florida since 1970. Owner Martin Cawley's small team does every job — no subcontractors. See real results in our before-and-after gallery.

Last updated: October 2026