Styrofoam LB


The exceptional robustness of Dow Styrofoam™ LB™ extruded polystyrene (XPS) rigid insulation and long-term thermal performance helps to ensure energy efficiency in a wide range of residential and commercial construction applications.

With long term proven performance and creep data, Styrofoam™ LB™ XPS insulation is an ideal engineered product that designers may confidently specify in today’s increasingly highly insulated designs. For sandwich panel cores, the lightweight, close tolerance, dust-free surface of Styrofoam™ LB™ XPS allows for excellent bonding to a wide variety of sheet materials.

Dow Styrofoam™ LB™ XPS rigid thermal insulation has been specifically designed to withstand severe dynamic loads and stresses which may eventually lead to fatigue and failure. It is specially designed to resist such force and in tests has been shown to perform extremely well under dynamic load cycling.


Download or print LB Data Sheet

Dow Styrofoam XPS LB Insulation Foam

Styrofoam™ LB™ XPS insulation is manufactured through a continuous extrusion process, and as with all Dow Styrofoam™ products possess a rigid closed cell structure with unique properties such as low thermal conductivity, high resistance to water penetration and high compressive strength.

Styrofoam™ LB™ XPS insulation is produced in a range of thicknesses and is smooth on both facers. By placing the insulation outside the building mass it protects both membrane and slab from thermal cycling and loading.

The Dow Styrofoam™ LB™ XPS rigid insulation range will help curb escalating energy bills, reduce a building’s carbon footprint and provide a more comfortable indoor environment.


Specification Clause
General Application Board

Dow Styrofoam™ LB™ extruded polystyrene general application board should be described in specifications as:-

The insulation shall be Dow Styrofoam™ LB™ __mm closed cell rigid cellular extruded polystyrene (XPS) foam panel with minimum compressive strength 300 kPa. Dow Styrofoam™ LB™ is distributed by Dynamic Composite Technologies - T: 1800 051 100.


  • Cold store floors
  • Cold roof
  • Cold bridge insulation
  • External render and/or cladding
  • Plasterboard laminate
  • Refrigerated truck panels
  • Composite building panels


  • High compressive strength-to-weight ratio
  • Low susceptibility to rot, mould or fungal growth
  • Clean, odourless and free from irritating dust


 Technical Data

Product Name: Dow Styrofoam™ RTM-X 
Extruded polystyrene XPS rigid thermal insulation
Product Description: Dow Styrofoam™ LB extruded polystyrene (XPS) rigid thermal insulation board for cold store floors, cold roof, cold bridge insulation, external render and/or cladding, plasterboard laminate, refrigerated truck panels and composite building panels.

Surface finish:
Product code:
Edge treatment:
Nominal Thickness:
Compressive strength:
Water absorption by immersion:
Temperature Limited:

Butt edge
75 and 1000 mm
600 mm
2500 mm
30 kg/m³
300 kPa (min) @ 10% deformation
0.5% - vol. (28 days, full board)


Nominal Thickness to R-Value
Dow Styrofoam™ LB XPS @ 24°C
Nominal Thickness
Lambda/K Value/Thermal
R Value
75 0.0278 2.7
100 0.0278 3.6


Download or print LB Data Sheet

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