Felt Roof Edge Detail

Always try to carry membrane felts over or up and over and down to ensure the roof membrane will always drain free and clear of any adjacent system.

Felt roof edge detail. 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. Without a drip edge water may end up beneath the shingles and may cause damage to various parts of the home. 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. To see the full range of brands we offer click here.

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. In all cases it is important to properly detail and install the edge conditions. 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. 12 roof repair tips.

Roofing felt is sold in rolls and the product label will give information on the area contained. Drip edges are metal sheets usually shaped like an l installed at the edge of the roof. Jj roofing supplies stock the biggest brands in the roofing industry enabling us to offer the widest range of roofing products. This lets any water that gets on the roof run down the underlayment and over the drip edge.

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. Also called drip edge flashing or d metal they serve a vital function by directing water away from the fascia and into the gutter. 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. The standard roof edge details illustrated in this section are generally applicable.