Use six nails and four spots of asphalt roofing cement for every full shingle for every full shingle as shown below.
Roof shingle installation manual.
Gaf shingles must be installed on slopes of 2 12 or greater.
Measure one panel width in from the roof edge.
Repeat this basic pattern alternating shingles across the roof working toward the right side using the chalk line to keep the shingles straight horizontally.
At this point chalk a line from ridge to eave.
Apply 1 spots of asphalt roofing cement under each corner and at about 12 to 13 in from each edge.
Overlap each row at least 3 to 4 inches.
If you live in an area with inclement weather you should consider using a special ice and water protector.
Asphalt roofing cement should meet astm d 4586 type ii.
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Start by laying asphalt felt or other underlayment over the roof.
Use 4 nails per shingle and 6 nails on the prevailing windward sides of the roof as wind resistance nailing.
Installation instructions instrucciones de instalación general instructions coverage.
The purpose of this guide is to provide you with quality instructions and detailed procedures on roof application and product installations following the asphalt roofi ng.
Install new flashing metal.
Panel installation should begin at the gable end of the roof opposite the prevailing rain bearing wind this will provide added assurance against wind driven rain being forced under the laps.
Place the leading edge of the first panel along this line.
Butt a full shingle up against the cut shingle and nail into place.
Using your staple gun secure the felt to the roof.
Overlap each metal piece by at least 150 mm 6 and use asphalt plastic cement under each section of overlap.
Use minimum 3 8 10 mm plywood or osb decking as recommended by apa the.
Center a minimum 610 mm 24 wide minimum 28 gauge pre finished galvanized metal valley liner in the valley and fasten with only enough nails to hold it in place nailing at the edges only.
3 bundles 1 bundle of 20 and 2 bundles of 22 when applied according to instructions will cover 98 4 square feet 9 14 square meters.
Roofer s guide to roof installation.