Onduline Roofing Sheets Overlap

The run is the horizontal distance of the ridge from the eave.

Onduline roofing sheets overlap.

The direction of the overlap is opposite to the direction of the prevailing winds. Up signs indicate the direction of the ridge to lay the sheets correctly. Slope of the roof. Overlap 12 cm 3.

Start fixing sheets at the opposite to prevailing winds end of the roof. Ensure watertightness at ridge by applying the onduvilla foam fillers on both sides of the ridge line. 15 fixings minimum should be used per sheet. Ensure waterproofing by aligning the overlapping lines.

Get your measurements right. Overlap and side overlap. The ridge element should overlap the onduline sheet at minimum 14 cm. The rise if the vertical distance of the ridge above the eave.

Nail or screw every corrugation on eaves overlaps and ridges. Begin every second raw with a sheet cut in half vertically. Fix 19 nails or screws per sheet to have a longlasting and guaranteed roof. 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.

The roof slop is often stated as the inches of vertical rise per 12 inches of horizontal run length. Lay ridge elements with a minimum overlap of 12 5 cm. Stagger the rows by starting the second row with a half sheet see in drawing the sheet 4. 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.