Overlap For Roof Membrane

Try to ensure they are above the line at which the second length of membrane will overlap.

Overlap for roof membrane.

Therefore a 2 inch overlap provides redundancy at the edges where the barrier is weakest. Video of the day. The easy installation involves placing metal panels on your roof but you ll need to be mindful of metal roof overlap. Roll out the membrane to the end of the roof run.

Continue up the roof laying lengths of breather membrane. The final covering of tiles or slates will provide a secure fixing. Start at the low point of the roof and position a perimeter 39 or 991mm roll of tpo roof membrane square with the roof edge. A flat roof that had been over coated with a liquid based system which itself is breaking down a bonded overlay would not be suitable although with some preparatory works a mechanically fastened overlay system might be an option.

Roofing felt is required to overlap 2 inches over the lower felt course. If your panels aren t layered properly water damage can occur. Pull back some of the release sheet from the upper half of the membrane. Align the roll for the correct overlap and continue removing the upper half of the release sheet.

Finally a surfacing is applied to provide protection and an appealing aesthetic. Grace roof detail membrane is the only product available today designed specifically for waterproofing critical roof detail areas. Check that this is the case adding temporary clout nails to the top of the membrane. Heat welded seams provide superior strength.

If there is no ridge ventilation the breather membrane should go over the ridge and overlap each side of the ridge line by the required overlap. We suggest a dip of approximately 10 15mm. All field sheets incorporate 6 control lines for overlap and fastener placement. Tpo s long term heat uv and natural fungal resistance plus flexibility without need for plasticizers also make tpo a reliable low slope roofing system.

Lay the membrane back down and tack the top corner. Roof valleys on roof valleys ensure the breather membrane is extended by a minimum of 300mm on each side measured from the centre of the valley. Place the end of the sheet according to instructions to allow the correct overlap. Short for thermoplastic polyolefin tpo is a single ply roofing membrane that offers excellent performance at a cost effective price.

The surface layer can be a mineral cap sheet fused to the layers below or just a final layer of asphalt mopped across the entire roof. Nail along the top edge of the membrane to hold it in place while the adhesive sets up. The overlapping felt creates a secondary barrier for moisture and wicks water away from the shingles above and the sheathing below.