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

Basetherm Board


Jablite BaseTherm™ Board completes the installation of Jablite External Wall insulation by providing lightweight, moisture resistant base boards that can be easily cut-to- size on site and installed below the insulation boards.

Basetherm boards are manufactured from low moisture absorption expanded polystyrene (EPS).

The entire external wall insulation wrap can be supplied from one supplier ensuring consistent quality and easy of supply

Key Benefits
  • Can be bonded or mechanically fixed to the wall
  • Helps to achieve a high quality rendered surface
  • Excellent thermal performance
  • Prevents low level condensation
  • Stops cold bridging
  • Lightweight and easy to handle
  • Flood proof
  • Has an A+ rating in the BRE Green Guide to Specification
Downloads & Specifications
Basetherm Board

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

Technical Resources
Technical information
Product specification

Jablite BaseTherm™ Board insulation is supplied:

Standard board size is 1200 x 1200mm
Standard size thicknesses are 50mm and 100mm
Also available in thickness increments of 5mm from 100mm to 250mm
Manufactured using low moisture absorption expanded polystyrene (EPS)



Jablite BaseTherm™ Board insulation is produced to the requirements of BS En 13163 ‘Thermal insulation products for buildings – Factory made products of expanded polystyrene (EPS) – specification’.

For a High Performance Building Envelope – Specify Jablite BaseTherm™ Board