Failing caulk in a shower or tub is the leading cause of bathroom water damage. The caulk separates from the wall or tub surface, water gets behind it, and the underlying drywall, framing, or subfloor begins to rot — often invisibly until the damage is severe. Rose Restoration replaces failed caulk in showers, tubs, kitchens, and around stone countertops with mildew-resistant silicone that lasts 8–12 years instead of the 1–3 years typical of homeowner-applied caulk.
When Caulk Needs Replacement
- Black mold or mildew growing through the caulk — once mold is in the caulk itself, cleaning won’t remove it permanently
- Caulk has separated from the wall or tub — visible gaps along the seam
- Caulk has yellowed or hardened — usually 3–5 years after acrylic caulk was applied
- Cracking or splitting along the bead — water now gets behind it
- Previous “fixes” by re-caulking over old caulk — old layers trap moisture; full removal is the only durable fix
The Rose Caulk Replacement Process
- Step 1 — Full removal. All old caulk gets cut out with razor blades and pulled clean. We don’t caulk over old caulk.
- Step 2 — Mold and mildew treatment. Any mold or mildew under the old caulk gets cleaned and treated with an antimicrobial solution before the new caulk goes down.
- Step 3 — Surface prep and cleaning. The substrate is solvent-cleaned to remove soap scum, body oils, and old adhesive residue. New caulk needs a clean, dry surface to bond.
- Step 4 — Apply mildew-resistant silicone. We use 100% silicone (not acrylic, not siliconized acrylic) with mildewcide additive. Color-matched to your tile or stone.
- Step 5 — Tool the bead. The bead is tooled to a clean concave profile that sheds water. Excess is cleaned from adjacent surfaces immediately.
- Step 6 — Cure time. The silicone needs 24 hours before water exposure. We brief you on the no-water window.
Where Rose Replaces Caulk
- Tub-to-tile junctions
- Shower wall corners (vertical seams)
- Shower wall-to-floor junctions
- Shower curb-to-tile
- Vanity backsplash to wall
- Kitchen counter to backsplash
- Stone fireplace surround joints
- Marble or stone seam joints (caulk between countertop slabs)
Frequently Asked Questions
Why does caulk in my shower keep getting moldy even after I clean it?
Once mold has penetrated the caulk material itself, surface cleaning only removes the visible portion. The mold spores remain inside the caulk and re-bloom whenever moisture returns. The only durable fix is full caulk removal and replacement with mildew-resistant silicone.
How long does professional caulk replacement last?
8–12 years for properly removed-and-replaced 100% silicone in residential bathrooms. High-use commercial bathrooms see 5–8 years. The bead degrades from chemical exposure (cleaning agents) and physical movement (settling, water expansion), not from mold itself, when it’s installed correctly.
Why not just re-caulk over the old caulk?
Caulking over old caulk traps any mold, soap residue, or moisture underneath, where it continues to grow and degrade the bond from below. Within 1–2 years the new caulk fails the same way the old one did. Full removal is the only durable approach.
Do you replace caulk on stone showers and countertops too?
Yes — and stone surfaces require special care. The wrong caulk can stain marble, limestone, or travertine through capillary action. We use stone-safe silicones and protect adjacent surfaces during application. Caulk replacement on stone is often part of a broader marble shower restoration or granite shower restoration project.
How much does caulk replacement cost?
Most residential shower or tub caulk replacement projects run $250–$650 depending on scope. Whole-bathroom replacements (shower + tub + vanity + base) are typically $450–$900. Commercial projects scale based on linear feet and access. Free on-site assessment included.
Schedule a free assessment or call (703) 327-7676.
Related: Marble shower restoration · Granite shower restoration · Grout color sealing · All grout services
