Felt Roof Edge Detail

Divide the area of your roof by the area of the felt rolls you plan to use and allow an approximate 10 extra for waste.

Felt roof edge detail.

In all cases it is important to properly detail and install the edge conditions. Jj roofing supplies stock the biggest brands in the roofing industry enabling us to offer the widest range of roofing products. Traditional asphalt impregnated felt roofing like that in our sketch above is installed overlapped a minimum of 2 3 inches single coverage or overlapped half its width or 16 inches double coverage or overlapped 2 3 its width to give a 12 inch exposure and a 3 ply roof or 3 4 of its width to give a 9 inch exposure and a 4 ply roof. Drip edges are metal sheets usually shaped like an l installed at the edge of the roof.

12 roof repair tips. Video library flat roof edge and trim details with enviroflex. Roofing felt is sold in rolls and the product label will give information on the area contained. These edges are built up using a triangular fillet of timber and a higher fascia board with a felt lip overhanging to prevent any rain water from going over the edge see edge detail 2.

Where the edge of the roof does not feed into a gutter and does not abut a higher vertical wall these are referred to as verge drips. To see the full range of brands we offer click here. The best way is to install the roof drip edge only along the eaves first then place ice and water barrier in the snowbelt or felt paper underlayment over the drip edge. This lets any water that gets on the roof run down the underlayment and over the drip edge.

The standard roof edge details illustrated in this section are generally applicable. If you install the drip edge on top of the felt any condensation or water running down the roof surface between shingles and felt will run underneath the drip edge down the fascia and perhaps into the building soffit or walls not a nice thing. A roof edge detail should be installed as specified by the designer at all flat edges of the roof where the field membrane ends and at internal and external gutters. Find and fix a leaking roof step 2.