Cut six inches off the length of the first starter shingle nailed on then use the rest of them full size.
First row for roof.
Start at the eave area just over the ice and water shield with a three inches of overlap about 3 and work your way up.
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Measure the length of a shingle as it lies across the roof.
This should leave you with about 1 2 of the shingle left.
When installing the paper you will overlap the felt paper per local building code usually 2 4.
Begin your first row at the lower left corner of your roof.
To begin installing the first shingles on your roof cut off the three tabs on the shingle.
The exposure on the first course of slates may be reduced by dropping the chalk line for the top of the second course of slates in order to increase the headlap on the starter course.
Before you install your first shingle use your utility knife to cut 6 inches off of the side then lay it on your roof allowing the architectural shingles to hang between 1 2 to 2 inches over the edge.
The first row of shingles is called a starter strip.
Work up from the initial row starting at the lower corner in a diagonal pattern staggering the shingles to prevent gaps.
Lay the starter row of metal shingles at the drip edge and affix to the roof with metal roofing nails.
Most asphalt shingles are 3 feet 91 4 centimeters in length.
Make sure this row has a slight overhang 1 4 to 3 8 in beyond the drip edge.
Lay the first row of shingles directly covering the narrow starter row.
Using a utility knife cut them off at the bottom of the adhesive strip.
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This will help determine how the shingles will lay on the roof width.
The height distance up the roof of the starter slate must be at least 3 inches greater than the vertical exposure on the first course of slate.
To make your own use the flat solid part of the shingles.
If your roof s width is not an even multiple of the shingle s length you will have a partial piece on one end of each row.
Shifting them in this way will join the ends of the first regular row of shingles placed over the starter shingles.
Snap a horizontal chalk line over the starting row to use as a guide.
Following the manufacturer s directions.