I've been handling tile orders for Florida contractors and builders for about seven years now. In that time, I've personally made (and documented) 14 significant mistakes, totaling roughly $23,000 in wasted material and rework. I keep a running checklist on our whiteboard, and every time a new installer or designer comes in, we walk through it together. It's saved us from repeating the same errors. Here's the version I wish I had when I started.
Who This Checklist Is For
If you're a contractor, architect, or DIY homeowner planning a tile project anywhere in Florida — especially if it involves high‑end materials like Calacatta Gold porcelain or a full shower renovation with Schluter trim and a new valve — this list will help you dodge the stuff that will cause a callback.
The 6‑Step Checklist
1. Verify Substrate Conditions (Don't Trust the Earliest Look)
It's tempting to think that if the concrete slab looks dry and flat, you're good to go. But Florida's humidity and occasional moisture intrusion can hide behind a clean surface. In September 2022, I approved a 1,200 sq. ft. porcelain tile install on a slab that seemed fine. Three weeks later, the tile started lipping. Turns out the slab had a 4% moisture variance. Cost to fix: $3,200 and a pissed‑off client. Now I always do a calcium chloride test first. According to TCNA (Tile Council of North America), max 3 lbs per 1,000 sq. ft. per 24 hours for thin‑set installations. Don't skip this.
2. Match Tile Specs to the Actual Room Conditions
You might love that wood‑look plank in the showroom, but is it rated for Florida's temperature swings? I once ordered a “porcelain” Calacatta Gold that turned out to be a rectified tile with a PEI rating of 3 — fine for walls, not for a high‑traffic entryway. The distributor listed it as “floor and wall,” but the fine print said interior residential only. We installed it in a commercial lobby. It started chipping in six months. Replacing 80 pieces cost $1,800. Lesson: verify PEI, water absorption (<0.5% for porcelain), and frost resistance (yes, even in Florida, for outdoor areas).
3. Plan for Movement Joints (Everyone Forgets)
This is the #1 mistake I see from people who've only worked in colder climates. In Florida, we have lots of thermal expansion and soil movement. Skipping movement joints is a recipe for tenting. The TCNA Handbook specifies soft joints every 8–12 feet in interior areas, and at all perimeters. I ignored this once on a 600 sq. ft. patio using concrete tile. Two months later — cracks everywhere. That was a $2,400 do‑over. I now put movement joint locations on the layout drawing before install starts.
4. Choose Schluter Trim Early — and Order Extra
If you're using Schluter profiles (and you should be, for a clean finish), don't wait until the tile is cut. I've been in situations where the Schluter color we wanted was backordered for three weeks, and the client was furious. The “Schluter trim” category is broad — you need to know the exact profile (e.g., Quadec, Rondec, Jolly) and finish.
I order 10% extra for waste and odd cuts. And I order at the same time as the tile, because shipping delays on a $12 piece of trim can hold up an entire job. Seriously, a ton of headaches happen because of that little metal strip.
Also: always check the installation instructions. Schluter has specific requirements for thinset coverage under their profiles. Missing that voids the warranty.
5. Shower Valve Placement — Measure Twice, Cut Once
Shower valve rough‑in height seems straightforward: standard is 48 inches from finished floor. But if you're using a thick porcelain or a mud‑set system, the finished floor height can change by 1-2 inches. I once set a valve at 48" from the subfloor, then the tile and mortar added 1.25". The handle ended up above the center of the niche — looks terrible, and the client made us move it. That cost $890 and a one‑week delay. Always set the valve height based on finished floor elevation. Mark that on the stud with a sharpie. Then double‑check before you close the wall.
6. Quality Check the Finished Surface Before Grouting
Once grout is in, many problems become hidden (or expensive to fix). I developed a simple checklist to run before the grout bucket opens:
- Lippage < 1/32" on rectified tile? (Use a straightedge and feeler gauge.)
- All cut edges at walls and fixtures are straight within 1/16"?
- Schluter profiles are flush with tile surface?
- No hollow‑sounding tiles (tap test)?
- Shower pan slope meets code (¼" per foot)?
I went back and forth between adding this step or trusting the installer. On paper, the installer was experienced. But my gut said check. I found four hollow spots that would have cracked under foot traffic. That saved us a $1,200 callback. Now this step is non‑negotiable. It's super easy to do, and it catches the mistakes that would otherwise become disasters.
Common Mistakes & Why They Happen
If I had to boil down the root cause of almost every issue: people assume “Florida tile” is the same as tile anywhere else. It's not. The climate, the soil, and the building codes are unique. The “use a good thinset” advice ignores the fact that you also need a crack isolation membrane in some zones (Florida Building Code requires it over concrete joints). The “always get three quotes” advice ignores that the cheapest bid probably skipped Step 1 and Step 3.
I've learned that spending an extra $200 on moisture testing and proper planning saves you $2,000 in future callbacks. And for contractors, that translates directly to your reputation. When the homeowner sees a flawless tile job with perfectly aligned Schluter trim and a centered shower valve, they remember your name. That's the brand image you want.
So here's my final piece of advice: save this checklist, tape it to your tool box, and run it on every single job. Your future self (and your profit margin) will thank you.
