Always install flashing around a chimney and other valleys where two roof planes meet as these areas are more prone to leaks if not protected.
How to properly install roof shinges oround a sky light.
If you have to replace shingles around a skylight examine the old flashing.
Some wrap corners some don t.
Nail the piece to the roof at the top outside corners of the u and cover the exposed sides with shingles.
Nail the drip edge in place using your hammer and roofing nails.
Adhere the joint where the cut edges of the shingles meet the dome with roofing tar.
Adhere the shingles adjacent to the flange with roofing tar.
Now place the u shaped sill flashing over the shingles as shown and slip it over the skylight s bottom end.
Install shingles over the roof underlayment up to the sill figure 8a.
Attach he ridge cap shingles with two nails each.
Cut the shingles to fit around the flange s dome.
To start installing shingles line up aluminum drip edge flush with the edge of the roof and make a pencil line at the top on each end of the house.
Pull the drip edge down about a half inch from that line to create a gap between the drip edge and the fascia board.
The membrane will seal around the nails.
Some counter flash some don t etc.
Nail roofing shingles over the bottom membrane.
Most residential skylights sit on a raised curb made watertight with metal flashing.
The following are drawings of one tried and true method presented in step by step installation procedures from dry in to setting a standard 2 x 4 skylight on a curb.
Trim the shingles away from the ridge vent hole.
There are many ways to install the primary flashing and roofing materials around skylights.
Using the chalk line snap a line between the two marks to get a straight edge.
Install new flashing metal flashing is often called drip edge along the bottom of the roof near your gutters.
If it s carefully removed when the old roof is torn off it should be reusable.
Install from the bottom up lapping each piece on top of the lower one.