Felt Roof Drip Edge Detail

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.

Felt roof drip edge detail.

The drip edge should extend at least 2 inches on the roof. This lets any water that gets on the roof run down the underlayment and over the drip edge. With fasteners as specified in section r905 2 5. Adjacent pieces of drip edge should overlap at least 2 inches 51 mm.

It only gets worse when the usually 3 4 1 thick fascia board is added later when the finish work is being done. 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. Drip edge is installed around the whole perimeter of the roof. Install drip edges on the eaves first.

Roofers will hurriedly run a cutter along the edge of the wood deck but rarely do it in a straight line. 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. Here philip explains how he is fitting a welted drip on this flat roof and what it does for the roof. Underlayment shall be installed over the drip edge along eaves and under the drip edge along rake edges.

Drip edge varies in dimensions but typically the flange that nails to the roof surface is about 2 5 wide and the vertical edge that directs roof runoff down and away is about 1 5 in depth. Place the drip edge down aligning it so water will drip into the gutters. It is used to hold the underlayments down and create a watertight seal around the edge of the roof. This leaves the edge of the felt somewhat short of the edge thereby failing to overhang the roof deck.

Install roof drip edge along the eaves add underlayment then place drip edge along the gable end. 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. The drip edge also gives us a nice straight edge with which to align roof shingles slates or other roofing material. Must be installed at the rakes and eaves of the roof.

In all cases it is important to properly detail and install the edge conditions. Drip edges shall be mechanically fastened to the roof deck at not more than 12 inches 305 mm o c.