Most bathroom remodeling projects don't fail because a contractor made one dramatic error — they fail because small, cheap-looking decisions stack up.
These are the mistakes we see most often on Houston jobs, and the ones we vet every scope against before we start.
1. Skipping real waterproofing behind tile
Green board is not waterproof. Kerdi or a liquid membrane is the difference between 5-year and 25-year tile.
2. Wrong slope to the drain
Under ¼" per foot ponds water. That ponding is the #1 cause of grout failure and hidden mold.
3. Undersized or missing exhaust fan
A weak fan (or one vented into the attic) grows mold above the ceiling. Vent 110 CFM through the roof.
4. Choosing a slab-door vanity over drawers
Everyone regrets it. Drawers are the single biggest usability upgrade in any bath.
5. Skipping blocking for future grab bars
$50 during framing, $2,000 to retrofit. Blocking is the cheapest aging-in-place move ever.
6. Cheap builder-grade mixing valve
A $30 cartridge behind $8,000 of tile is a bad trade. Use Delta Multichoice, Moen M-Core, or Grohe.
7. No access panel to the valve
Every valve fails eventually. A removable panel saves thousands of dollars in tile demo.
8. Overhead-only lighting
Overhead lights throw shadows on the face. Add vertical sconces or a lit mirror for grooming.
9. Buying tile before selecting layout
Layout dictates cuts, waste, and grout lines. Design the layout first, then order tile with 15% overage.
10. Cutting corners on the plumbing rough-in
Shifting drain locations by an inch after tile goes down is a nightmare. Verify rough-in twice before closing walls.
How to vet your contractor
Read your bathroom remodeling bid line by line and ask which of these mistakes are being avoided — in writing. A contractor who welcomes the question is the one you want; a contractor who deflects is the one to walk away from.
If you'd like a second set of eyes on a scope of work or an existing bid, we're happy to walk through it with you.
