Keep the tub. Lose the ugly walls. — serving Berlin & nearby(860) 990-2332
HOME / Tub Surround Waterproofing

Waterproofing: the Invisible Half

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

Every failed surround we tear out in Berlin 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.

  • 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.

Berlin notes

In Berlin we photograph every membrane coat with that day's date: Berlin's most common call: a fiberglass surround gone yellow and chalky around a perfectly good tub — re-tile the walls, keep the tub. Dry walls are a system, not a material — and the system is what our workmanship stands on.

Materials

Dry-wall system, layer by layer

Surround tile we set most in Berlin — each suits different baths and budgets.

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

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 Berlin tear-outs we do are greenboard autopsies. We never tile over it.
Kerdi, RedGard, Hydro Ban — which is best?
All work when installed to spec; the installer matters more than the brand. We use sheet membrane in showers and paint-on for tub surrounds, per manufacturer coverage rates.
Do you warranty against leaks?
Our workmanship warranty covers the assembly we build — substrate, membrane, joints and seals. The quote states terms plainly; no weasel words.