Caulking & Weatherproofing in Martinez & Contra Costa County

Failing caulk and worn weatherstripping let in drafts, moisture, and pests — and silently inflate your energy bills. Bay Bilt removes 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.

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Fully Insured
Licensed-Exempt Handyman
25-Mile Service Radius
Fast Response

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

Typical Price Range

Bathroom tub or shower re-caulk: $100–$175. Full window caulking pass (5–8 windows): $150–$275. Door weatherstripping replacement: $75–$150 per door.

When You Need a Licensed Contractor Instead

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 we re-caulk the exterior.

Related Repair Guides

Door, Lock & Weatherstripping Repairs Bathroom Handyman Repairs Exterior & Seasonal Home Maintenance Pre-Listing & Home Inspection Repairs

Caulking & Weatherproofing Near You

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. We do all three steps.
: Yes — exterior caulking around window frames and trim is one of the most cost-effective weatherization improvements. We use paintable elastomeric caulk rated for exterior use.

Need Caulking & Weatherproofing in Contra Costa County?

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