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A tub and tile junction with old cracked mildew-blackened caulk being scraped out beside a caulk gun and painter tape.

The Fix-It Library · Water and Plumbing

Cracked or Moldy Caulk Repair in Nashville

Gaps and black lines around tubs, sinks and windows that let water and drafts in. Call 615-431-3789.

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At a Glance

About the Cracked or Moldy Caulk

Caulk dries, shrinks and cracks as a house moves. Gaps let water behind tubs, tile and trim, and dark mildew sets in on old sealant.

Fresh caulk is one of the quickest, most effective repairs: we remove all the old material, clean the joint, tape clean lines and apply the right sealant for the spot.

Kitchens and Baths

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Problem familyWater and Plumbing
Usually found inKitchens, baths and laundry rooms
Typical parts and toolsMildew-resistant silicone, Exterior sealant, Backer rod for big gaps, Painter’s tape
Good to knowKeeps water out of walls and floors

The Repair Sheet

How It Rates

A general guide to how urgent this repair is, how quick the fix is, how little mess it makes and how long it lasts.

  • How urgent3 / 5
  • How quick the fix5 / 5
  • How little mess4 / 5
  • How long it lasts4 / 5

A general guide. Every house and every repair is different, and we confirm on site.

Typical parts and tools

  • Mildew-resistant silicone
  • Exterior sealant
  • Backer rod for big gaps
  • Painter’s tape

What You Get

Why It Is Worth Fixing

  • Keeps water out of walls and floors
  • Cleans up the look of a bath instantly
  • Helps stop drafts at windows
  • Fast, high-impact repair
  • Prevents more costly rot and mold

Where It Shows Up

Where We See It Most

Water problems waste water and damage what is around them, so they are quick to fix and worth fixing early.

  • Tubs and showers
  • Kitchen sinks and backsplashes
  • Windows and exterior trim
  • Baseboards and countertops

More Repairs

More Water and Plumbing

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Good to Know

Questions About a Cracked or Moldy Caulk

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What causes a cracked or moldy caulk?

Caulk dries, shrinks and cracks as a house moves. Gaps let water behind tubs, tile and trim, and dark mildew sets in on old sealant.

When is a cracked or moldy caulk worth fixing right away?

It is especially worth fixing for: tubs and showers; kitchen sinks and backsplashes; windows and exterior trim; baseboards and countertops.

Can Nashville House Repair fix a cracked or moldy caulk?

We scrape out every bit of old caulk, clean and dry the joint, tape for crisp lines and apply the right flexible sealant, tooled smooth. Call 615-431-3789 or send the form for a free estimate.

Free Estimate

Tell Us What Needs Fixing

Send a list, a photo or just a description, and we will get back to you quickly with a plan and a free estimate. Prefer to talk? Call 615-431-3789.

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