Long length Kalzip
Kalzip sheets are commonly used in long lengths (with continuous lengths in excess of 150 metres being achieved) therefore the understanding and control of thermal movement is a prime
consideration.
Thermal movement
The colour and finish of a roof will also play an important role in determining the anticipated thermal movement. As a rule of thumb the following thermal movement rates are adopted for aluminium.
| |
| |
|
|
| Finish |
Approx. temperature attained |
Movement per metre length (mm) |
| |
Stucco/mill |
40° - 50°C |
1.0 |
 |
Light colour |
40° - 50°C |
1.0 |
|
Dark colour |
70° - 80°C |
1.5 |
|
It is recommended that on roof areas with sheet lengths exceeding 40 metres the Kalzip E clip is used. These allow for a more efficient accommodation of thermal movement which is particularly relevant when designing the structure, sub-structure and fasteners to accommodate long lengths of standing seam sheets; potentially allowing thinner structural material and fewer fasteners to be used.
If you would like more information on using long length Kalzip sheets, please contact the Kalzip Technical Department. |
