Kalzip thermal performance
The thermal bridging effect that clips have on the U-value of a Kalzip roof system is dependent upon the type of clip used (i.e. Kalzip aluminium L type or Kalzip reinforced polyamide E type) and the frequency of clips (clips/m2) penetrating the insulation layer. This frequency will, in turn, be dependent upon the specific project loading requirements, purlin centres and load capacity of the Kalzip system.
Highly efficient thermal performance can be achieved by means of constructive measures helping minimise whole life cycle costs and achieve U-values of 0.13 W/m2K and below.
The following Kalzip U-value tables cover a range of support centres (1m to 2.8m) and a range of mineral fibre insulants with differing thermal conductivities. The U-value tables have been derived from hot-box testing carried out to BS EN ISO 8990:1996 - Thermal Insulation - Determination of steady-state thermal transmission properties - Calibrated hot box. It should be noted that Approved Document L2 gives preference to testing over calculation methods when determining U-values.
For more details about U-values and Kalzip thermal performance please contact the Kalzip Technical Department. |
