We react to a video that opens with the words: “the biggest mistake a tiler can make…” those are some strong words! (watch what he says here)
But when Rob is asked about the biggest mistake a tile installer can make in a shower, his answer has very little to do with appearance.
It’s improper waterproofing.
And that’s what makes this particular mistake so dangerous: a shower can look absolutely beautiful while something is going very wrong behind the tile.
You can make the “biggest mistake” on a shower and it could still look beautiful.
We’ve torn apart plenty of showers that looked fine from the outside.
The tile was attractive. The grout looked good. Nothing about the finished surface immediately screamed “problem.”
Then demolition started.
Behind the tile, we found areas that simply weren’t waterproofed correctly.
That’s the reality homeowners need to understand: tile and grout are not the waterproofing system.
They are the finished surface.
Water can get through grout joints and into the materials behind the tile. A properly constructed shower is designed with that reality in mind.
If there isn’t a dependable waterproof system underneath, moisture can eventually reach places where it doesn’t belong.
Most of the time you won’t find evidence of the biggest mistake until you tear out the shower.
A crooked grout joint is annoying, but at least you can see it.
Water getting into a wall cavity is different.
By the time there is an obvious sign on the finished side of the bathroom, moisture may have been getting behind the shower for a long time.
That can lead to damaged drywall or backer materials, deteriorated wood, mold-friendly conditions, and other expensive repairs.
Here in Southwest Florida, moisture problems can become especially troublesome. Once damp wood and other vulnerable materials are involved, you can also create conditions that are much more attractive to pests such as termites.
So while waterproofing may not be the most exciting part of a bathroom remodel, it has a pretty important job.
It helps protect the house.
Waterproofing Happens Before the Pretty Part
This is one reason we spend so much time talking about what goes behind the tile.
Before the homeowner ever sees the finished porcelain, marble, mosaic, or grout color, the shower needs to be prepared as a complete water-management system.
The floor needs the correct slope.
Corners and seams need to be addressed.
The drain needs to integrate correctly with the waterproofing.
Niches, benches, curbs, and penetrations all need careful attention because every one of them creates another place where water could potentially find its way into the structure.
Once the tile goes up, most of that work disappears forever.
That’s exactly how it should be.
But hidden doesn’t mean unimportant.
Why We Prefer Schluter Waterproofing Systems
At Mann Tile, we prefer Schluter waterproofing systems for our shower installations.
One of the advantages of a bonded waterproofing system is that the waterproof layer is directly behind the finished tile.
The shower walls, floor, corners, niches, and drain can all be connected into one continuous system designed to manage water before it gets deeper into the assembly.
We prefer that approach over traditional water-in/water-out shower construction, where moisture is allowed to move farther into the mortar system before eventually reaching the liner and drain system below.
Our goal is simple:
Keep the water as close to the surface as possible and give it a clear path toward the drain.
The Cheapest Part to Fix Is the Part You Haven’t Covered Yet
Waterproofing mistakes are much easier to correct before the tile is installed.
Once a beautiful shower is completely finished, fixing a problem behind it can mean removing tile, mortar, backer material, and sometimes much more.
That’s why this isn’t an area where we want to rush or assume something is “probably fine.”
If there’s a questionable seam or connection, the time to address it is when the waterproofing is still exposed.
Nobody wants to tear apart a brand-new shower to repair something that could have been corrected before the first tile was set.
Look Beyond the Finished Tile
When choosing a contractor, it’s understandable to look at photos of completed projects.
You should.
But also ask what you can’t see in those photos.
What waterproofing system do they use?
How do they treat corners and seams?
How is the drain connected?
How are niches and penetrations waterproofed?
Those answers may tell you more about the quality of a shower than the prettiest finished picture in the portfolio.
A good-looking shower is important.
A good-looking shower that also keeps water out of your house is much better.
For homeowners in Englewood, Venice, North Port, and throughout Southwest Florida, MannTile focuses just as much attention on the waterproofing behind the tile as the tile you actually see. Because some of the most important work in a shower should never be visible again once the job is finished.