Tolerance
ALL FINISHED INSULATION SIZE TO HAVE A TOLERANCE OF - 4MM TO +0MM TO SUIT VARYING CAVITY SIZES

Calculation method for assessing Thermal Bridging at the edges of openings.

Performance Test Data of Extrusion U-P.V.C./Plasticised - co-extruded under the control of a Quality Assurance System.

Performance Test Data of Insulation

X.P.S. (Extruded Polystyrene)
Thermal Conductivity 0.029 W/mK

Technical Reference
Building Regulations 2000 Approved Document L1 + L2.

BRE publication
"Thermal Insulation: Avoiding the risks".

TSO Publication: Limiting Thermal Bridging and Air Leakage: Robust construction Details for Dwellings and Similar Buildings

BRE Scotland:
Conventions for U Value Calculations