Under Tile Waterproofing
Membrane systems installed beneath tile
What under tile waterproofing actually involves
Tile is water resistant. The substrate underneath it is not. Under tile waterproofing installs a bonded membrane between the slab and the tile assembly so that moisture passing through grout joints is stopped before it ever reaches the structure. We install sheet and liquid-applied systems on showers, balconies, terraces, kitchens, and interior wet areas, with reinforced treatment at every corner, drain, and change in plane.
Every project starts the same way: we look at the property, establish what water is doing and where it is entering, and only then specify a system. That order matters — a correctly installed product solving the wrong problem still leaves you with a wet building.
Included in every under tile waterproofing project
- Bonded sheet and liquid-applied membrane systems
- Reinforced corners, curbs, and wall-to-floor transitions
- Bonding flange and clamping ring drain integration
- Correct slope-to-drain verified before tile is set
- Flood testing prior to setting materials
- Crack isolation over active substrate joints
Four steps from first call to sign-off
Substrate Assessment
We evaluate the slab, existing slope, drain type, and moisture conditions before specifying a system.
Preparation & Priming
Surfaces are cleaned, profiled, and primed so the membrane bonds to sound substrate rather than dust or laitance.
Membrane Installation
The membrane is applied at spec thickness with reinforcing fabric at corners, drains, and transitions.
Flood Test & Handoff
The assembly is flood tested and documented, then released to the tile installer with confidence.
The difference a properly built assembly makes
Waterproofing is buried work. Once the backfill, topping slab, or tile goes over it, nobody sees the detailing again — which is exactly why the details have to be right the first time.
Diagnosed First
We confirm where water is genuinely entering before specifying anything, so the work targets a cause rather than a symptom.
Matched to Conditions
Substrate, exposure, and water pressure decide the system. The same product is not right for every property.
Prepared Properly
Profiled, cleaned, moisture-tested surfaces. Preparation is where most failed waterproofing jobs actually went wrong.
Tested & Documented
Flood tests, electronic detection, and photo records so you have proof the assembly performs before it is covered up.
Detail-driven from start to finish
Durable waterproofing comes from disciplined habits, not premium product names. Here is the standard we hold ourselves to on every project.
A Written Scope
You get the system, the sequence, and the expected result in writing before work begins.
Substrate Preparation
Grinding, profiling, and repair to a sound surface — never a coating applied over unsound concrete.
Reinforced Detailing
Corners, drains, penetrations, and joints get reinforcement, because that is where assemblies fail.
Site Protection
Landscaping, hardscape, finishes, and adjacent surfaces are protected for the length of the project.
Verification Before Close-Out
Testing under real conditions, then a walkthrough so nothing gets buried on assumption.
Questions, answered
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View Below Grade Waterproofing detailsGet a free estimate for under tile waterproofing
Share a few details about the property and we will come back with clear next steps — usually the same business day.