Onduline Roofing Sheets Overlap

The direction of the overlap is opposite to the direction of the prevailing winds.

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. Fix 19 nails or screws per sheet to have a longlasting and guaranteed roof. Overlap 12 cm 3. 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. The slope of the roof can be calculated from measurements of the rise and run of the roof. Get your measurements right. Start fixing sheets at the opposite to prevailing winds end of the roof.

The roof slop is often stated as the inches of vertical rise per 12 inches of horizontal run length. 15 fixings minimum should be used per sheet. The ridge element should overlap the onduline sheet at minimum 14 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.

Stagger the rows by starting the second row with a half sheet see in drawing the sheet 4. Up signs indicate the direction of the ridge to lay the sheets correctly. The rise if the vertical distance of the ridge above the eave. Begin every second raw with a sheet cut in half vertically.

The run is the horizontal distance of the ridge from the eave. Ensure waterproofing by aligning the overlapping lines. 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. Nail or screw every corrugation on eaves overlaps and ridges.