Liner selection, slope calculator, ANSI 118.10 compliance & HVHZ requirements
FL BUILDING CODE COMPLIANTDry-Pack Mix Ratio (FL Standard):
5 parts clean sand : 1 part Portland cement (Type I or II)
Water: just enough to hold shape when squeezed — "sandcastle consistency"
Do NOT use pre-mixed mortar or thin-set for mortar bed
Min Mortar Bed Thickness (ANSI A108.01):
• At drain: 3/4" minimum over liner
• At curb / walls: 1-1/4" minimum
• Reinforcement: 15 lb. felt or metal lath when bed exceeds 1-1/4" in residential FL
Cure Time Before Tile (FL Heat & Humidity):
• Dry-pack bed: 24–72 hours (minimum 24 hrs before walking on)
• Tile installation: minimum 24 hrs after bed achieves 75% strength
• Do NOT let mortar bed dry too fast — cover with plastic in direct FL sun
Curb Height Requirements (FL):
• Standard shower curb: 2" minimum above finished shower floor (FBC R307.2)
• ADA / barrier-free: max 1/2" curb height for roll-in compliance (ADA 2010 §608.7)
• Steam shower curb: 9" minimum above shower floor (to retain steam)
• HVHZ (Miami-Dade / Broward): verify curb height with local AHJ — some coastal areas require 3" min for water intrusion protection
ANSI A118.10 is the gold standard for bonded waterproofing membranes in FL.
• Membrane must achieve 7-day water absorption ≤ 0.2%
• Elongation ≥ 50% at break (critical for FL thermal expansion cycles)
• Adhesive shear strength ≥ 50 psi after water immersion
• Products meeting ANSI A118.10: Schluter KERDI, Mapei AquaDefense, Laticrete Hydro Ban, RedGard, USG Durock Tile Membrane
ANSI A118.12 — Electrically Conductive Mortars (required for heated shower floors)
TCNA Handbook Method B-422 — Reference for bonded membrane over cement board with tile
FBC R307.2 / IPC 417.5:
• All shower receptors and compartments shall be waterproof
• Shower liner (PVC/CPE) shall extend at least 3 inches above the top of the rough curb
• Liner shall be turned up and secured at studs before cement board / backer installation
• Liner test: fill with water to 2" below top of rough curb for 24 hours — zero leakage (FBC R307.2.1)
Inspection Requirements (FBC):
• Pre-pour inspection required before mortar bed pour (liner, drain, liner dam)
• Rough plumbing inspection for drain rough-in
• Some FL counties require flood test inspection by inspector — not just contractor self-certification
Applies to: Miami-Dade and Broward Counties (and portions of Palm Beach)
• FL Product Approval required for all waterproofing membranes in HVHZ exterior applications
• Interior shower waterproofing: standard ANSI 118.10 products acceptable in HVHZ
• Exterior shower / pool bath walls: must comply with FBC R7017 — weather-resistant barrier (WRB) required behind tile on exterior walls
• HVHZ: all cement board fasteners must be corrosion-resistant (304 SS minimum for shower interiors)
• Miami-Dade Product Control: search productcontrol.miamidade.gov for approved membranes
Steam Shower (HVHZ):
• HVHZ steam showers require vapor barrier on all walls AND ceiling (not just floor)
• Ceiling slope ≥ 1/2" per foot toward wall (prevent steam condensate drip)
• Generator must be FL Product-Approved; outdoor units need 140 mph wind rating
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On this page, Florida shower pan waterproofing estimates run about $150-$300, depending on home size, materials, and project scope. Use the calculator above for a Florida-specific estimate.
Pricing depends on the size and layout of your home, the materials and fixtures you choose, your Florida region and local labor rates, and permit fees. Work that is more complex or harder to access generally costs more.
In Florida, minor maintenance may be DIY, but anything beyond that generally calls for a licensed plumber, and many jobs require a permit and inspection. When a permit, or your main water or drain lines are involved, hire a Florida-licensed plumber.
It depends on the cause and your specific policy. Sudden, accidental damage is more often covered than gradual wear-and-tear or maintenance - confirm the details with your insurer.
Timelines depend on scope - many routine jobs take a few hours to a day, while larger projects run longer. Your licensed plumber can confirm after assessing your home.
Planning estimate, not a quote — confirm with a licensed Florida plumber. Confidence is qualitative: ranges reflect this page’s Florida assumptions, not a guaranteed price.
Estimates on this page are Florida-specific and reflect Shower Pan Waterproofing for typical Florida homes.
From this page: On this page, Florida shower pan waterproofing estimates run about $150-$300, depending on home size, materials, and project scope. Use the calculator above for a Florida-specific estimate.
Your actual cost depends on your home's condition, layout, and local labor and permit rates.
From this page: Pricing depends on the size and layout of your home, the materials and fixtures you choose, your Florida region and local labor rates, and permit fees. Work that is more complex or harder to access generally costs more.
Generally raises cost: harder access, older homes, added permits and inspections, premium fixtures or materials, and emergency or after-hours work.
Generally lowers cost: easy access, bundling several items in one visit, standard fixtures, and off-peak scheduling.
Curated Florida tools and resources related to this page.
Last reviewed: July 1, 2026 (US Eastern)
Reviewed by the FL Plumbing Tools editorial team.
Sources: Florida plumbing cost research and Florida Building Code / local authority-having-jurisdiction (AHJ) permit references.
Florida reference: Estimates and guidance reflect Florida labor rates, permitting, hard water, humidity, and coastal conditions.
Updates: Reviewed periodically and updated as Florida codes, permit fees, and market rates change.