Open valleys have metal flashing to protect this critical area of the roof.
How to roof a house with asphalt shingles flashing.
15 asphalt saturated felt underlayment some codes may require no.
Proper steps to shingle a house roof.
To install asphalt shingles start by installing underlayment and new flashing on the roof.
Secure the horizontal flange to the roof.
Each layer overlaps the lower one by at least 2 in.
Use a utility knife to cut shingles as needed to properly fit edges and corners.
Snap a chalk line between the two transition marks on the shingle roof.
Every 5 inches make a new mark until you get to the rop of the roof.
Then begin nailing the shingles to the roof working in rows and starting at the edge of the roof.
Start at the bottom of the roof and work your way upward one straight row at a time.
Ask this old house general contractor tom silva reveals the best ways to secure shingles to a roof.
Repeat this on both sides of the roof.
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When started the first row use a tape measure to ensure that the shingles will extend half an inch off the roof and hang over the drip edge.
Use your chalk and tape measure to mark about 12 inches up on the roof for the first set of shingles.
Place the second step flashing piece over the end shingle in the first course by positioning it 143 mm 5 5 8 above the bottom edge of the exposed asphalt shingle.
The line extends 12 inches beyond the marks each way to establish the length of the transition flashing.
Follow this step by nailing drip edge along rakes sides of roof on top of the underlayment.
Once you ve done that cut your shingles to size if they re not already.
Roofing a house can easily become a full weekend diy project especially if you are looking to install a roof on a house that is non traditional in size or style.
Cover the rest of the roof with no.
As you did with the flashing always lap upper pieces over lower pieces.
While some skylight manufacturers include flashing in their products sometimes roofing professionals have to create it or purchase it separately.
As a general rule of thumb roofing a house involves more than just adding exterior shingles.
Make sure that the tab of the shingle in the second course will cover it completely.
