Onduline Roofing Sheets Overlap

The roof slop is often stated as the inches of vertical rise per 12 inches of horizontal run length.

Onduline roofing sheets overlap.

15 fixings minimum should be used per sheet. The direction of the overlap is opposite to the direction of the prevailing winds. The run is the horizontal distance of the ridge from the eave. Cover the ridge with the slim cap and fix it on each side of the roof through the foam fillers on top of the corrugations.

Onduline roofing only comes in one length 2m x 0 95m so your first port of call should be to ensure that you have enough material for the job. Start fixing sheets at the opposite to prevailing winds end of the roof. Get your measurements right. Stagger the rows by starting the second row with a half sheet see in drawing the sheet 4.

Fix 19 nails or screws per sheet to have a longlasting and guaranteed roof. The slope of the roof can be calculated from measurements of the rise and run of the roof. Of course sheets can be cut but there s a minimum requirement for overhang 70mm at the eaves and pitching 5 degrees. Lay ridge elements with a minimum overlap of 12 5 cm.

To have a long lasting and guaranteed roof it is mandatory to follow the nailing order and pattern ridges start fixing the ridge element opposite to the prevailing winds end of the roof. Ensure waterproofing by aligning the overlapping lines. Ensure watertightness at ridge by applying the onduvilla foam fillers on both sides of the ridge line. Overlap and side overlap.

The ridge element should overlap the onduline sheet at minimum 14 cm. Begin every second raw with a sheet cut in half vertically. Overlap 12 cm 3. Slope of the roof.