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Waterproofing: the Invisible Half

Tile is the pretty 10%. This page is about the dry 90%.

Every failed surround we tear out in West Hartford tells the same story: decent tile over drywall, greenboard, or mastic that re-emulsified years ago. The tile did not fail — the wall behind it dissolved. Our rebuilds assume water WILL get past grout eventually, and manage it: cement board that doesn't swell, a bonded membrane on every wet surface, sealed fasteners, and silicone — never grout — at every corner and tub joint.

West Hartford notes

In West Hartford we photograph every membrane coat with that day's date: West Hartford's vintage baths reward restraint: a pro regrout and color-seal can make 1940s tile look intentional again instead of tired. Dry walls are a system, not a material — and the system is what our workmanship stands on.

  • Cement board substrate. Won't swell, soften or feed mold when wet.
  • Bonded membrane. Paint-on or sheet membrane over every wet-area square foot.
  • Sealed penetrations. Valves, spouts and fasteners gasketed, not just grouted around.
  • Movement joints. 100% silicone at corners, tub line and ceiling — grout cracks there.
  • Photo documentation. You see the waterproofing before tile covers it. Always.
Materials

Dry-wall system, layer by layer

Six directions West Hartford tub owners choose between, with honest notes on each.

Porcelain subway

Dense, wipeable, the value default.

Stacked large-format

Calm modern walls, fewer joints.

Herringbone accent

Plumbing-wall art that costs little.

Mosaic & penny

Pattern, grip and vintage charm.

FAQ

Common questions

Can I see the waterproofing before tile?
You must — we photograph every stage and walk you through before setting begins. Any bidder who won't show rough work is telling you something.
How much of my quote is waterproofing?
Roughly $350–$700 of a standard surround: board, membrane, sealants and the labor to do them right. It's the cheapest insurance in the job.
What waterproofing do you use?
Cement board substrate, bonded membrane over all wet surfaces, sealed fasteners and penetrations, and 100% silicone at every change of plane. Photographed before tile covers it.
Is greenboard behind tile OK?
No — moisture-resistant drywall still fails under chronic wetting. Most West Hartford tear-outs we do are greenboard autopsies. We never tile over it.