The profile must be suitable for the strength requirements of the building, and appropriate for the minimum pitch, and the material selected must be suitable for the environment and be compatible with adjacent building materials. See 4 Durability.
Aluminium requires special installation details to achieve durability. See 14.20 Fixing Aluminium Sheeting for more details.
Measuring should take place once sufficient structure is in place to enable accurate calculation of lengths required. It is beneficial to make more than one measurement of any run to identify discrepancies and avoid errors.
Cladding materials should be ordered with enough time to allow for manufacture and transport. Profile, thickness, colour, grade, and any requirements for labelling of bundles should all be clearly identified.
Do not mix products; different manufacturers use different paint formulations. Where different brands of pre-painted material are used on the same building, differences in colour, gloss, and weathering performance may appear immediately or over time.
Load safety and protection is primarily the driver’s responsibility.
Short sheets should be packed on top of longer ones, which should have end and edge protection to avoid cut-end damage to the sheets below them. Dunnage should be evenly spaced in vertical alignment. Bundles must be placed and secured to protect against damage from other materials.
For sheets that are exposed on the underside in situ, such as for unlined wall cladding applications, or have double-sided or fleece-lined coatings, protection must be given to prevent the dunnage from damaging the bottom sheet. This is normally achieved by the application of a short slip sheet with paper overlay.
On longer distances, extra protection or packaging may be required to protect the material from fretting during transport.
For longer lengths, when a long boom is required for off-loading, a suitable boom should accompany the load unless otherwise arranged.
