Product Description

Lambdaboard is a flexible faced Polyisocyanurate(PIR) insulation board manufactured on a continuous laminating line.


  • Over purlin
  • Vertical cladding
  • Under screed
  • Cavity wall
  • Curtain wall
  • Ceilings
  • Under soffit
  • Ducting
Lambdaboard checkers

Physical Properties

  • Thicknesses available: 20mm, 30mm, 40mm, 50mm, 60mm,80mm and 100mm
  • Lengths: Cut to size to maximum of 13500mm
  • Standard widths: 1220mm
  • Facings: Matt mineral coated fibreglass tissue, aluminium scrim reinforced, bitumised kraft, kraft paper.

Thermal Properties

Thickness R-value (m²K/W)
20mm 0.83
25mm 1.04
30mm 1.25
40mm 1.67
50mm 2.08
60mm 2.50
80mm 3.33
100mm 4.17