What is the cost to remove old silicone caulk and regrout the tub-to-tile joint in my Ottawa bathroom?

Removing old silicone caulk and re-caulking (not regrouting) the tub-to-tile joint typically costs $150 to $400 for a standard bathtub in Ottawa, depending on the size of your tub and the condition of the existing caulk. This is actually a caulking job rather than grouting — the flexible joint where your tub meets the tile wall should always be sealed with 100% silicone caulk, never grout, because this joint needs to flex as the tub moves slightly when filled with water and as materials expand and contract with Ottawa's temperature swings.

Ottawa's extreme climate makes proper tub caulking especially important because the dramatic humidity changes between our bone-dry winter heating season and humid summers put extra stress on these seals. Failed caulk allows water to penetrate behind the tub and into the wall cavity, where it can cause mold, rot, and expensive structural damage. The freeze-thaw cycling that affects outdoor surfaces doesn't directly impact indoor caulk, but the constant expansion and contraction of materials in our 60-degree annual temperature range means caulk joints work harder here than in milder climates.

If you're handy with basic tools, this is actually an excellent DIY project that can save you $100 to $300 in labor costs. The process involves completely removing the old caulk with a utility knife or caulk removal tool, cleaning the joint thoroughly with rubbing alcohol to remove soap residue and mildew, and applying a fresh bead of high-quality 100% silicone caulk. The key is patience during removal — every bit of old caulk must come out or the new caulk won't adhere properly. Use painter's tape above and below the joint for a clean, professional-looking bead, and smooth the caulk with a wet finger or caulk tool before removing the tape.

The materials cost only $15 to $30 — a tube of quality silicone caulk, caulk removal tool, rubbing alcohol, and painter's tape. However, if your tub surround has extensive tile damage, loose tiles, or if you discover water damage behind the old caulk, you'll need professional tile repair or waterproofing work that can run $500 to $2,000 depending on the extent of the problem.