How long does bathroom caulk last?

In a regularly-used shower or tub, 3–5 years before it starts cracking, peeling, or growing mildew beneath the surface. Re-caulking proactively prevents tile damage and subfloor moisture problems.

Why is my bathroom caulk moldy even though I clean it?

Once mold penetrates behind a caulk bead, surface cleaning won't eliminate it. The old caulk must be fully removed, the substrate cleaned with a mold-killing solution, dried, and then fresh caulk applied. I do all three steps.

Can you caulk around exterior windows to reduce drafts?

Yes — exterior caulking around window frames and trim is one of the most cost-effective weatherization improvements. I use paintable elastomeric caulk rated for exterior use.

Handyman service · Martinez, CA

Caulking & Weatherproofing in Martinez & Contra Costa County

Failing caulk and worn weatherstripping let in drafts, moisture, and pests — and silently inflate your energy bills. I remove old, cracked, or moldy caulk and applies fresh bead, then reseals windows, doors, and bathroom fixtures to keep your home tight and comfortable year-round.

Get a Quote Call 925-257-2685

Insured local handymanOne person, one phone number

Based in MartinezServing about 35 miles around

Quoted before I startSend photos for a quote

What's Included

Window exterior caulk removal and replacement
Door and window interior caulk bead
Bathroom tub and shower re-caulking
Bathroom vanity and backsplash sealing
Door weatherstripping replacement (foam, V-strip, door sweeps)
Exterior gap sealing (foundation, HVAC penetrations)
Garage door bottom seal replacement

Pricing

I price each job by the size of the work, access, and materials, and I quote before I start. Single-visit jobs like this stay well under California's $1,000 limit for unlicensed handyman work. Send a few photos and a short description for a quote.

When I'll Refer You to a Licensed Pro

Caulking is maintenance work and doesn't require a contractor's license. If moisture intrusion has caused structural rot behind window frames or in wall cavities, a licensed contractor should assess and repair the framing before I re-caulk the exterior.

Bay Bilt is not a licensed contractor. Work is limited to jobs under $1,000 (labor and materials). Insured.

Related Repair Guides

Door, Lock & Weatherstripping Repairs Bathroom Handyman Repairs Exterior & Seasonal Home Maintenance Pre-Listing & Home Inspection Repairs Door weatherstripping: types, cost and when to replace it

Caulking & Weatherproofing in Your City

Martinez Pleasant Hill Concord Walnut Creek Lafayette Alamo Danville Benicia Clayton Pacheco Pittsburg Vallejo Antioch Pinole Hercules El Cerrito San Ramon

Frequently Asked Questions

: In a regularly-used shower or tub, 3–5 years before it starts cracking, peeling, or growing mildew beneath the surface. Re-caulking proactively prevents tile damage and subfloor moisture problems.
: Once mold penetrates behind a caulk bead, surface cleaning won't eliminate it. The old caulk must be fully removed, the substrate cleaned with a mold-killing solution, dried, and then fresh caulk applied. I do all three steps.
: Yes — exterior caulking around window frames and trim is one of the most cost-effective weatherization improvements. I use paintable elastomeric caulk rated for exterior use.

Get on the schedule

Need Caulking & Weatherproofing in Martinez or nearby?

Send a few photos and what you need done. I'll quote the job before I start.

Get a quote Call 925-257-2685