Find answers to common questions here – these FAQS are designed to provide a better understanding of metal cladding building systems and their various applications.

If you cannot find the answer to your question here, please contact MCRMA on 01633 895633 or via the technical hotline.


Side lap sealing: During the site assembly of built-up cladding systems the side laps of the joints between adjacent lining sheets must be sealed adequately using 50mm x 1mm tape. The sealing strip must lap either side of the side joint and must be in full and bonded contact along the length of the sheet. Cold or damp site conditions can affect the adhesive properties of the tape; therefore ensure that the tape is “brushed down” onto the joint before the insulation is laid.
End lap sealing: The end lap of lining sheets must be fully sealed to provide adequate air and vapour sealing. Butyl strip should be positioned within the end lap in a continuous unbroken length and it should form around the shape of the profile without stretching. Particular care should be taken at corners and junctions to ensure continuity of the seal. To complete the end lap joint a series of fasteners should be inserted through the lap into the underlying purlin to pull the joint together and provide fixture for the lining panels.



Please note:

Any uncertainty about the use or application of a product or system should be referred back to the manufacturer for detailed written advice. Manufacturers are best placed to offer advice about their particular products and any variation from their published data during the design or construction process could result in the component or system failing prematurely or not complying with the guarantee or warranty conditions. Additional project specific advice for demanding or complex constructions may also be obtained from one of the independent consultants featured on the MCRMA web site.