Colour caps are used to cover the ends of fixings this allows the fixing to blend into the sheets colour.
How to fix box profile roofing sheets.
The lower end of the sheet can be fixed through every trough to ensure the wind does not uplift the steel sheeting.
Box profile sheets are always fixed with a tech fasteners in the valley trough part of the sheet directly into the purlin underneath.
Installing the sheets is simple to do using cladco screws for installing box profile 34 1000 the recommended installation is through troughs 1 3 4 and 6.
When fixing through the sheet directly into a timber purlin a 32mm timber tek screw is recommended.
Primary fixings should be in profile valleys where possible.
Fix roofing sheets nail or drill each sheet into the purlins or decking beneath at every point at which the sheet overlaps and at the top and bottom of the slopes.
The bottom end of the sheets you can fix in each trough to help prevent wind uplift of the sheets.