Onduline Roofing Sheets Overlap

Up signs indicate the direction of the ridge to lay the sheets correctly.

Onduline roofing sheets overlap.

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. Begin every second raw with a sheet cut in half vertically. Get your measurements right. Ensure watertightness at ridge by applying the onduvilla foam fillers on both sides of the ridge line.

Of course sheets can be cut but there s a minimum requirement for overhang 70mm at the eaves and pitching 5 degrees. Overlap 12 cm 3. The rise if the vertical distance of the ridge above the eave. The roof slop is often stated as the inches of vertical rise per 12 inches of horizontal run length.

Nail or screw every corrugation on eaves overlaps and ridges. The run is the horizontal distance of the ridge from the eave. Lay ridge elements with a minimum overlap of 12 5 cm. The ridge element should overlap the onduline sheet at minimum 14 cm.

Start fixing sheets at the opposite to prevailing winds end of the roof. The direction of the overlap is opposite to the direction of the prevailing winds. 15 fixings minimum should be used per sheet. Slope of the roof.

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. Stagger the rows by starting the second row with a half sheet see in drawing the sheet 4. Ensure waterproofing by aligning the overlapping lines. 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.