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.
Felt flat roof drip edge detail.
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Drip edges are metal sheets usually shaped like an l installed at the edge of the roof.
Our photo illustrates several details of roof drip edge eaves flashing and gable end flashing at an asphalt shingle re roof job we documented in dutchess county new york.
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 form the welted drip see edge detail above right cut suitable lengths check but usually about 200mm 8 inch of top sheet nail each length to the timber batten along the edge of the roof with the felt underside facing out and with the sheet hanging down away from the roof ensure that the clean area along the edge of the top sheet line up with the edge of the adjacent sheet.
12 roof repair tips.
The standard roof edge details illustrated in this section are generally applicable.
Find and fix a leaking roof step 2.
Consult firestone s technical department for assistance when.
Without a drip edge water may end up beneath the shingles and may cause damage to various parts of the home.
This lets any water that gets on the roof run down the underlayment and over the drip edge.