Overlap For Roof Membrane

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.

Overlap for roof membrane.

Pull back some of the release sheet from the upper half of the membrane. Therefore a 2 inch overlap provides redundancy at the edges where the barrier is weakest. All field sheets incorporate 6 control lines for overlap and fastener placement. Short for thermoplastic polyolefin tpo is a single ply roofing membrane that offers excellent performance at a cost effective price.

Place the end of the sheet according to instructions to allow the correct overlap. The final covering of tiles or slates will provide a secure fixing. Continue up the roof laying lengths of breather membrane. Video of the day.

Grace roof detail membrane is the only product available today designed specifically for waterproofing critical roof detail areas. Roll out the membrane to the end of the roof run. Nail along the top edge of the membrane to hold it in place while the adhesive sets up. 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.

Finally a surfacing is applied to provide protection and an appealing aesthetic. Check that this is the case adding temporary clout nails to the top of the membrane. 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. The overlapping felt creates a secondary barrier for moisture and wicks water away from the shingles above and the sheathing below.

Metal roofs though less appealing than shingle or tile is a more fire resistant and heat reflecting roofing option. Try to ensure they are above the line at which the second length of membrane will overlap. We suggest a dip of approximately 10 15mm. Lay the membrane back down and tack the top corner.

Based on the grace ice and water shield technology grace roof detail membrane is a flexible product that conforms tightly to common roof details such as skylights chimneys and dormer walls. Heat welded seams provide superior strength. 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. More overlap is used at roof edges and transitions while less overlap is required across the main roof area.

Align the roll for the correct overlap and continue removing the upper half of the release sheet. If your panels aren t layered properly water damage can occur. 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.