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.
Overlap for roof membrane.
Roll out the membrane to the end of the roof run.
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.
The easy installation involves placing metal panels on your roof but you ll need to be mindful of metal roof overlap.
Try to ensure they are above the line at which the second length of membrane will 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.
We suggest a dip of approximately 10 15mm.
Heat welded seams provide superior strength.
Short for thermoplastic polyolefin tpo is a single ply roofing membrane that offers excellent performance at a cost effective price.
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.
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.
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.
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.
Pull back some of the release sheet from the upper half of the membrane.
Grace roof detail membrane is the only product available today designed specifically for waterproofing critical roof detail areas.
If your panels aren t layered properly water damage can occur.
Nail along the top edge of the membrane to hold it in place while the adhesive sets up.
Check that this is the case adding temporary clout nails to the top of the membrane.
Place the end of the sheet according to instructions to allow the correct overlap.
Roofing felt is required to overlap 2 inches over the lower felt course.
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.
Continue up the roof laying lengths of breather membrane.
Finally a surfacing is applied to provide protection and an appealing aesthetic.
Lay the membrane back down and tack the top corner.
Therefore a 2 inch overlap provides redundancy at the edges where the barrier is weakest.
More overlap is used at roof edges and transitions while less overlap is required across the main roof area.
The final covering of tiles or slates will provide a secure fixing.
