WebSheets should be overlapped by the next sheet in the run by atleast one profile or corrugation (‘sidelaps’). Adjacent runs ofsheets should overlap each otherby at least 250mm (‘endlaps’). 2c. Laying Sheets The first row of sheets should extend over the bottom purlin and the eaves so that rainwater can drain into a gutter or beyond thewall. WebFitting Box Profile Roofing Sheets. We recommend using a maximum purlin spacing of 750mm for 0.5mm and 1250mm for 0.7mm, but not going any more than 1000mm for 0.5mm and 1500mm for 0.7mm unless it’s necessary. Stitching the sheeting overlaps is very important (as shown). Stitching the overlapping castle every 500mm is adequate but you …

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Roofing sheet fitting - YouTube

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