Onduline Roofing Sheets Overlap

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 sheets overlap.

Ensure watertightness at ridge by applying the onduvilla foam fillers on both sides of the ridge line. Get your measurements right. Stagger the rows by starting the second row with a half sheet see in drawing the sheet 4. 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.

Lay ridge elements with a minimum overlap of 12 5 cm. The roof slop is often stated as the inches of vertical rise per 12 inches of horizontal run length. Begin every second raw with a sheet cut in half vertically. The run is the horizontal distance of the ridge from the eave.

Slope of the roof. 15 fixings minimum should be used per sheet. The rise if the vertical distance of the ridge above the eave. The direction of the overlap is opposite to the direction of the prevailing winds.

The slope of the roof can be calculated from measurements of the rise and run of the roof. Start fixing sheets at the opposite to prevailing winds end of the roof. Ensure waterproofing by aligning the overlapping lines. Overlap 12 cm 3.

The ridge element should overlap the onduline sheet at minimum 14 cm. Nail or screw every corrugation on eaves overlaps and ridges. 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. Overlap and side overlap.