The following details are a guide to aid during the installation of single skin sheeting, it is not meant to be a definitive guide as many different factors can contribute to the fixing of sheets.
Sealants & Fixings
To install carbon steel self drilling / self-tapping fasteners you will need a variable speed general purpose
screw driver that will run from approx, 0-2500 RPM. If installing a large area using heavy steel it may be beneficial to use a heavy-duty screwdriver. It is imperative when installing all types of self drilling and / or self-tapping fasteners that the nosepiece of the screwdriver is used and correctly adjusted. Care should be taken not to over tighten fasteners / washer combinations as this may cause water ingress. It can also contribute towards increased air leakage and reduced pull-over as a result of washer inversion. The following speeds are for guidance only as each installation will vary but the slower a fastener is installed the higher the mechanical performance obtained. Do not put your full body weight on the screwdriver when installing fasteners as this may cause the fastener point to burn out.
|Light Section Rail||1800 – 2500 RPM|
|Heavy Section Rail||MAX – 1800 RPM|
|Stitcher 0.7mm x 2||1800 – 2500 RPM|
When installing either carbon steel or self-tapping fasteners with correctly sized holes a powerful single speed screwdriver is preferred. The diagram below shows the correct installation when using a fixing with a sealer washer.