Jablite is the UK's largest producer of EPS products for insulation and civil engineering applications

Timber Frame Wall Insulation


Jablite Timber Frame Wall Insulation is manufactured from expanded polystyrene (EPS) and forms part of a wall insulation system used for timber frame construction.

Key Benefits
  • Lambda from 0.032W/mK
  • 100% recyclable
  • Easy to install
  • Lightweight and easy to handle
  • Insulates for the lifetime of the building
  • Achieves Fire Class E
  • Resistant to moisture
  • Durable and rot-proof
  • Maintains the cavity
  • EPS has an A+ rating in the BRE Green Guide to Specification
  • Permanent insulation for the lifetime of the building

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Downloads & Specifications
Timber Frame Wall Insulation

BBA Certificates and other supporting documents can be found in Technical Resources

Technical Resources
Technical information
Product specification


Standard size: 1200mm x 1200mm

Standard thickness: 140mm


Jablite Timber Frame Wall Insulation is supplied as EPS HP 70 E (grey) as defined in BS EN 13163. TFWI contains a flame retardant additive to achieve Reaction to Fire Class E. Any necessary fire performance should be provided by the system design.


Thermal performance

A U-Value of 0.18W/m²K can typically be achieved with a Jablite Timber Frame Wall Insulation based on a common cavity wall construction using a range of materials for both inner and outer leaf.