Felt Roof Drip Edge Detail

Install roof drip edge along the eaves add underlayment then place drip edge along the gable end.

Felt roof drip edge detail. In all cases it is important to properly detail and install the edge conditions. 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. 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. It only gets worse when the usually 3 4 1 thick fascia board is added later when the finish work is being done.

Drip edge is installed around the whole perimeter of the roof. Moisture accumulation with moisture accumulation being a factor with shingle deterioration it is important to locate the drip metal edging where the moisture can be quickly eliminated which is at the eaves or edges of the roof that overhang a supporting structure. This lets any water that gets on the roof run down the underlayment and over the drip edge. Drip edges shall be mechanically fastened to the roof deck at not more than 12 inches 305 mm o c.

The drip edge should extend at least 2 inches on the roof. Only the face of the metal is seen and is usually just white one to one and half inch stripe located right under the shingles and above the fascia. Must be installed at the rakes and eaves of the roof. With fasteners as specified in section r905 2 5.

Here philip explains how he is fitting a welted drip on this flat roof and what it does for the roof. The drip edge also gives us a nice straight edge with which to align roof shingles slates or other roofing material. A furring edge is a strip of one by two wood you install on the vertical surface of the house just beneath the roof s edge. When you install the drip edge over this strip it keeps the lower flange further from the home s siding which helps to keep water further from the home.

The vertical leg of the drip edge should be at least 1 5 inches wide and extend at least 0 25 inches below the sheathing. Place the drip edge down aligning it so water will drip into the gutters. Adjacent pieces of drip edge should overlap at least 2 inches 51 mm. Underlayment shall be installed over the drip edge along eaves and under the drip edge along rake edges.

Roofers will hurriedly run a cutter along the edge of the wood deck but rarely do it in a straight line. It is used to hold the underlayments down and create a watertight seal around the edge of the roof.