Marmox Board Ultra

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Marmox Board Ultra

Made to order

Marmox Board Ultra is an advanced light weight structural insulation board engineered for combined waterproofing, thermal insulation, and direct tiling applications.

Technical Property

Official Certified Value

Engineering Benefit

Structural Core Construction

High-density EPS/XPS core with polymer-cement & fiberglass mesh coating

High compressive strength combined with ultra-lightweight structural performance

Waterproof & Rot Resistance

100% Impermeable to water, moisture, and capillary action

Completely prevents water ingress, mold growth, and structural decay in wet zones

Thermal Insulation Performance

Ultra-low Thermal Conductivity ($\lambda$-value)

Minimizes thermal bridging, reduces energy loss, and optimizes underfloor heating

Tile Adhesion Surface

Polymer-cementitious textured coating (Tile-Ready)

Provides an exceptional mechanical lock and bond strength with standard tile adhesives

Marmox Board Ultra

  • Dual Waterproof & Thermal Insulation: Combines 100% water tightness with high thermal insulation values in a single board.

  • Direct Tile-Ready Surface: Eliminates the need for wet plastering or rendering, allowing tiles to be fixed directly to the board.

  • Lightweight & Easy to Cut: Significantly reduces dead loads on structures and can be easily cut using a standard utility knife.

  • High Load & Impact Resistance: Engineered to withstand structural loads and impact on floor and wall applications.

  • Wet Rooms & Walk-In Showers: Waterproof wall and floor lining substrate for residential and commercial bathrooms.

  • Internal & External Thermal Wall Insulation: Reduces heating and cooling costs while providing a stable cladding base.

  • Underfloor Heating Base Board: Directs heat upward into the room and prevents thermal loss into the subfloor.

  • Architectural Elements & Bath Surrounds: Ideal for fabricating curved walls, vanity units, bath surrounds, and spa benches.

  • Substrate Preparation: Ensure the base floor or wall surface is clean, dry, level, and structurally sound.

  • Board Fixing: Install Marmox Board Ultra using flexible cementitious tile adhesive on solid walls/floors, or mechanically using Marmox anchors/washers on timber or metal stud frames.

  • Joint Sealing: Seal all board joints and corner interfaces using Marmox Waterproofing Tape and sealant to form a continuous watertight barrier.

  • Tiling & Finishing: Apply flexible tile adhesive directly onto the Marmox Board Ultra surface and install ceramic, porcelain, or natural stone tiles.



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