Construction Boards

High performance waterproof extruded polystyrene board.

Marmox Construction Boards

Marmox construction boards are waterproof, provide thermal insulation, and even have acoustic insulating properties.  These innovative construction boards are versatile enough to use in any wet area application.  From constructing spa bath frames and vanities to underfloor heating insulation.

Marmox Australia is an Australian Company which form a part of the Marmox Group of Companies. We are the national distributors of Marmox products in Australia and specialise in high quality, cost effective and easy to use products.

  • High compressive strength (withstand 30 t/m2)
  • Rigid
  • Waterproof
  • Excellent heat insulation
  • Sound insulation (20 decibels)
  • High U-value (2.7 W/m2k for 10mm)
  • Extruded polystyrene closed cell structure retains R-value even in moist conditions
  • Easy to cut with a knife or saw.
  • Light weight can be carried by one person ,10mm board is 3 kgm/m2
  • Marmox is environmentally friendly, it is CFC and HCFC free


Density DIN53420 36 Kg/m³
Thermal conductivity DIN52612 0.027
Thermal conductivity (5 years) DIN52612 0.032
Compressive strength DIN53421 300 KN/m²
Water absorption (immersion) DIN53428 0.2% by vol
Water absorption (capillary) DIN53428 NIL

BS 476 part 6,7 class 0
DIN4102 B1
Coeff of expansion

Board Dimensions

Marmox boards come in different thicknesses; there is a recommended thickness for each application.

Thickness(mm) Width(mm) Length(mm)
4 600 1250
10 600 1250/2500

Marmox high performance construction boards:

  • can be fixed to timber or concrete floors using flexible tile adhesive and fasteners.
  • can be fixed to metal or timber frame walls and ceilings using fasteners.
  • can be used to bring uneven walls to level, an ideal feature for renovation works.
  • can be fixed on top of existing tiles or plaster boards.
  • can be installed under tile floor heating as barrier against heat loss in the slab, saving on heat-up time and running cost.
  • can be used for enclosing the simplest rectangular to the most intricate shaped bathtub.
  • can be used for bathroom furniture construction, such as shelves, vanity units, shower seats, etc.
  • are ideal for shower partitions in health clubs.
  • can be used to build planter boxes.


Marmox Brochure Marmox Brochure (966 KB)

Underfloor Heating Insulation Underfloor Heating Insulation (540 KB)

marmox board advantages

  • Waterproof
  • Heat insulation
  • Sound insulation
  • Extremely strong
  • Load bearing
  • Lightweight
  • Easy to work with
  • Cost effective
  • Environmentally friendly

Marmox Guides

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