Marmox Multiboard - Waterproof insulation boards for tiles or plaster

Multiboard

BBA certified Multiboard merges water resistance, thermal insulation, and structural strength.

Made from a rigid XPS core reinforced with fibreglass mesh and coated with a cementitious surface, Multiboard provides a stable, waterproof and thermally insulating base for tiling, plastering and rendering.

Its combination of light weight, waterproofing, insulation and strength makes it suitable for far more than simply backing tiles — from wetrooms and bathrooms to walls, floors, partitions, external applications and bespoke constructions.

One manufacturer. One consistent specification.

Marmox boards are manufactured at one established manufacturing facility, allowing us to maintain consistent control over the materials, construction and specification of our boards.

From the XPS core and reinforcement through to the finished surface, our boards are produced to the same established specification from production to production.

The Marmox Multiboard you specify today is made to the same established specification as the Marmox Multiboard you buy tomorrow.

Technical data and key information

Material
XPS, Polymer Cement, Fibreglass

Dimensions (mm)
600 x 1200
600 x 2400
1200 x 2400

Thickness (mm)
4, 6, 10, 12.5, 20, 30, 40, 50, 60

Thermal Conductivity (W/mK)
0.034

Compressive Strength (kPa) / (tonnes/m²)
400 (40)

Waterproof
High Insulation
Tile, Plaster or Render
Lightweight
Easy to Cut

View Specifications

Waterproofing and tiling: As a tile and shower backer board, it provides an effective decoupling membrane to prevent tiles and grout from cracking due to horizontal movement in the floor. The unique patented surface of Marmox Multiboard allows heavier tiles to be safely and securely fixed to walls. Being completely impermeable to water, it is doubly useful in areas prone to moisture, making it a good option for anyone looking for a kitchen or bathroom tile board.

Insulation: The XPS foam core of Marmox Multiboards provides effective thermal insulation. These boards can be used to insulate walls, floors, and ceilings, reducing heat transfer and improving energy efficiency. They are particularly useful in areas that require enhanced insulation, such as basements, exterior walls, and cold storage rooms.

Underfloor heating systems: Marmox Multiboards are widely used with underfloor heating systems. They can be laid over the subfloor, providing both insulation and a stable surface for the heating elements. Multiboards help to distribute heat evenly across the floor, enhancing the efficiency of the heating system.

Replacement for plasterboard: Use Multiboards as a direct replacement for plasterboard. Marmox Multiboards have a robust honeycomb surface finish that is ideal for applying a coat of plaster. The surface allows for the plaster to stick to it while the XPS prevent the plaster from drying out too fast and cracking.

Partition walls: Marmox Multiboards can be used to construct lightweight partition walls. Their insulation properties contribute to maintaining a comfortable indoor environment by reducing heat loss and sound transmission. They are easy to cut, shape and install, which makes them a flexible option for creating interior divisions or blocking up door/window openings.

Exterior cladding: Multiboards are also certified to be used externally. Cover outer walls to improve a building’s energy efficiency. The reinforced fibreglass mesh ensures stability, and the Multiboards can be finished with a render to enhance their aesthetics and weather resistance.