Marmox 22 mm Shower Underlay with Point Grid
Marmox 22 mm Shower Underlay with Point Grid
Marmox 22 mm Shower Underlay with Point Grid is an ultra slim 22 mm pre formed, sloped shower base engineered from high density Extruded Polystyrene (XPS) foam core.
Technical Property | Official Certified Value | Engineering Benefit |
Overall Board Thickness | Ultra-slim 22 mm profile | Ideal for flush floor transitions and timber/concrete floors with minimal floor build-up |
Core Material Composition | High-density Extruded Polystyrene Foam (XPS) | Ultra-lightweight structure delivering total water impermeability and thermal insulation |
Reinforcement Coating | Polymer-modified cement skin with fiberglass mesh | Provides high mechanical bond strength for direct tile, porcelain, or mosaic application |
Drainage System & Slope | Pre-sloped gradient falling to a central point drain (Point Grid) | Ensures efficient, multidirectional water evacuation toward the point drain without ponding |
Shower underlay with point grid
Ultra-Slim 22 mm Thickness: Allows seamless integration into existing timber or concrete floors to create true level-access walk-in showers.
Pre-Engineered Factory Slope: Guarantees mathematically precise water flow to the central point drain without manual screed preparation.
100% Waterproof Structure: XPS closed-cell core prevents moisture penetration, protecting subfloors and ceilings below from dampness and mold.
High Mechanical Load Resistance: Fiberglass-cement coating withstands compression and point loads while providing an ideal tile-ready surface.
Level-Access & Barrier-Free Showers: Excellent solution for accessible, wheelchair-friendly, and modern step-free bathroom layouts.
Height-Restricted Renovation Projects: Fits easily into timber floors and concrete substrates with limited recess depth.
Hotels & Commercial Hospitality Suites: Speeds up installation times while offering robust waterproofing and reliable drainage.
Residential Wet Rooms: Provides a durable, leak-proof substrate for mosaics, natural stone, and ceramic tile finishes.
Substrate Preparation: Ensure the base floor is clean, flat, and structurally sound; prepare the recess cutout for the point drain siphon.
Base Installation: Apply flexible C2 cementitious tile adhesive onto the substrate and press the Marmox 22 mm Shower Underlay firmly into place.
Point Drain Connection: Securely connect the point drain trap and outlet to the waste pipe system; perform a water tightness test.
Joint Sealing & Tiling: Apply Marmox Waterproof Tape over all board-to-wall and board-to-board joints before installing ceramic, porcelain, or mosaic tiles.
