Installing Metal Roofing Sheets

Our roofing sheet and wall cladding sheet fitting and installation guide gives you step by step instructions on how to fit your box profile, corrugated, tile effect roofing sheets or wall cladding sheets with ease.

ROOFING SHEET INSTALLATION GUIDE

  1. When fixing timber batons or steel purlins in preparation for our box profile or corrugated 0.55mm gauge roofing sheets, we recommend that you use centres of no greater than 1200mm and for 0.7mm gauge sheets no greater than 1800mm. For tile effect 0.55mm gauge roofing sheets, we recommend that you use centres of 300mm, 600mm or 900mm.

  2. Lay the sheets left to right overlapping just one profile. Do not overlap more than one as you will lose cover width. Note! If roofing sheets need to be cut to fit, use an electronic cutting tool, such as a nibbler to keep the galvanised seal.

  3. If overlapping box profile and corrugated sheets lengthways, allow an overlap of at least 153mm (6 inches), for tile effect sheets allow an overlap of at least one tile (300mm), and work from eaves to ridge. Ensure that you have a purlin or baton where the overlap sits.

  4. Sheets must be overlapped with the safety support lip on the bottom to give additional stability and to ensure water is not drawn back into your roof.

  5. Screw fixings through the valley (flat part) of the box profile or tile effect sheets or through the top curve for corrugated sheeting, at each purlin, until the washer bulges slightly. DO NOT overtighten! Fixings for timber, light steel, heavy steel and concrete are all self-tapping, however, if drilling through heavy steel it is advisable to drill a small pilot hole first.

  6. Stitch fixings can be used to pinch the overlap of sheets together, butyl sealant tape or silicone can also be used to secure overlaps.

  7. If you have an apex roof, apex ridge cappings are used on the ridge of the building to cover the ends of the sheets and prevent water from leaking in the top of the building. Stitch fixings are used to secure the capping to the sheets.

  8. Barge board flashings can be used on the gable ends of an apex roof, or around the three sides of a single sloping roof to encapsulate the roofing sheets and give a neat finish and to prevent high winds from lifting the sheets. Stitch fixings are used to secure the flashings to the sheets.

  9. Foam Fillers can be used at the ridge and eaves to stop vermin entering the roof space and prevent water leakage and drafts.

WALL CLADDING SHEET INSTALLATION GUIDE

  1. If fitting roofing sheets and wall cladding, fit your roofing sheets first.

  2. Drip cill flashings can be used on the base of the building to provide a runner for the wall cladding to sit on. Fit the drip cill to the bottom purlins and use a spirit level to ensure the lines run completely straight.

  3. Work from left to right fitting your cladding sheets, sit the sheets onto the drip cill to ensure they are completely straight.  Note! If cladding needs to be cut to fit, use an electronic cutting tool, such as a nibbler to keep the galvanised seal.

  4. Screw fixings through the peak of the box profile sheets (the section pointing into the building) or through the internal curve for corrugated sheeting, at each purlin, until the washer bulges slightly. DO NOT overtighten! Fixings for timber, light steel, heavy steel and concrete are all self-tapping, however, if drilling through heavy steel it is advisable to drill a small pilot hole first.

  5. Corner flashings can be used on the corners of the building to encapsulate the cladding sheets and give a neat finish. Stitch fixings are used to secure the flashings to the sheets.