Why Florida showers fail
Florida is where bad showers go to die — quickly. Constant humidity, no freeze-thaw to mask problems, and year-round shower use mean water finds every shortcut within a couple of years. The symptoms: grout that never looks clean, a musty smell, soft spots in drywall near the shower, or tile that sounds hollow when tapped.
Here's the uncomfortable truth: the tile isn't the waterproofing. Tile and grout are not waterproof — water passes through them. Every shower depends on a hidden waterproof layer underneath. When that layer is missing or done wrong, the shower fails no matter how pretty the tile is.
How proper waterproofing works
The pan. The shower floor isn't just tile on concrete. Underneath is a sloped waterproof pan — either a PVC/CPE liner or a bonded membrane system — that directs every drop to the drain. The slope matters: 1/4 inch per foot, no flat spots, no birdbaths.
The walls. Behind the tile, walls get a waterproof membrane — sheet membrane, liquid-applied, or foam backer board with sealed seams. Every corner, every screw hole, every pipe penetration gets sealed. Water that gets through the grout hits this layer and drains down to the pan.
The details. Corners. The curb top. Where the pan meets the walls. Around the valve and showerhead pipes. These junctions are where 90% of failures happen, and they're exactly what separates careful installers from fast ones.
The flood test: non-negotiable
After the pan is built and before a single tile goes on, we plug the drain, fill the pan with water, mark the level, and wait 24 hours. If the level drops, there's a leak — and we fix it before tile hides it forever.
Ask any shower contractor: "Do you flood-test every pan?" If the answer is anything but an immediate yes, keep looking. This single test catches the failures that become $15,000 tear-outs later.
Methods, ranked
Best: bonded membrane systems (Schluter-Kerdi, Laticrete Hydro Ban, and similar). Fully bonded, integrated drains, tested assemblies. This is what we use.
Good: traditional liner with mortar bed. The old-school method — PVC liner, sloped mortar, tile on top. Works fine when done right, but has more failure points at corners and penetrations.
Avoid: paint-on sealer as the only waterproofing. A coat of liquid membrane over drywall is better than nothing, but it's the minimum — and in Florida humidity, minimum isn't enough for a shower you want to last.
Avoid: tile directly on drywall. Standard drywall dissolves when wet. If your shower was built this way, it's failing already — you just can't see it yet.
How to tell if your current shower is failing
- Grout that stays dark or never fully dries
- Musty smell in or near the bathroom
- Soft or bubbling drywall outside the shower
- Tile that sounds hollow when tapped
- Water stains on the ceiling below
Seeing any of these? Call (407) 434-9297. We'll take a look and tell you honestly whether it's a repair or a rebuild.