wedi Shower Extensions
wedi® Shower Base Extensions – Curbed Shower Pan Expansion Panels
These wedi® shower base extension panels are the perfect solution for expanding your wedi Fundo® Primo or Fundo Riolito neo shower system. Designed with a uniform slope and built-in waterproofing, these extensions interlock seamlessly with your main shower base, creating a larger, custom-sized curbed shower without compromising on performance or installation speed.
Features & Benefits
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100% Waterproof Construction
Made from extruded polystyrene (XPS) foam with factory-applied cementitious coating, these panels are fully waterproof and mold-resistant—no extra membranes needed. -
Integrated One-Way Slope
Each panel is pre-sloped at 1/4" per foot for code-compliant drainage. No mud beds or slope prep required. -
Fast, Clean Installation
Panels interlock with wedi® bases and trim easily on site. Save hours compared to traditional framing and mud work. -
Lightweight Yet Durable
Reinforced foam core provides strength without the bulk. Easy to carry and position during install. -
Compatible with Curbs
Ideal for expanding curbed showers while maintaining uniform floor height and slope geometry. -
Complete wedi® System Integration
Engineered to work with wedi® wall panels, curbs, drains, sealants, and fasteners for full-system waterproof warranty eligibility.
Available Sizes & Specs
| Product Name | Part Number | Dimensions | Slope Direction | Compatible Bases |
|---|---|---|---|---|
| wedi Shower Base Extension 48" x 24" | 73783528 | 48" L x 24" W | Sloped along 24" width | Fundo Primo & Riolito neo |
| wedi Shower Base Extension 72" x 12" | US3000036 | 72" L x 12" W | Sloped along 12" width | Fundo Primo & Riolito neo |
Note: Installation height must be adjusted when attaching to wedi shower bases with perimeter thicknesses over 1.5", including the wedi Fundo Ligno. For off-angle or corner expansion, use the wedi Corner Extension Panels (sold separately).
How to Install
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Dry-fit and plan the layout
Determine which extension panels you'll need and mark their connection points to the primary base. -
Trim as needed
Use a utility knife or handsaw to trim extension panels for exact fit. -
Secure with sealant
Bond panels to the main base using wedi Joint Sealant and reinforce with wedi fasteners where applicable. -
Waterproof all seams
Seal joints with additional wedi sealant and Subliner Dry banding for complete waterproof continuity. -
Tile the same day
wedi’s fast-curing sealants and pre-sloped design allow for same-day tiling on most jobs.
