Here are some tips on installing asphalt shingles.
1. It is imperative to install asphalt shingles properly in order to get secure protection from heavy rains and frozen water that build up on the edge of your roof. This water can enter under your lower placed shingles and seep slowly into your house. Start by applying to the bare roof sheathing some self-adhesive waterproofing underlayment, after which you can then seal around any nails that have been pounded into it. These self adhesive underlayments should be applied at least 2 feet beyond the exterior walls from the eave.
2. Cover the remainder of the roofing felt underlayments saturated with asphalt in order to keep the roof deck dry before you start installing the shingles, and make sure that each layer is overlapping the lower one by a minimun of 2 inches, then nail the drip edge running alongside the sides of the roof above the underlayment making sure that the upper pieces are overlapping the lower pieces.
3. Locate the roofs center from the top along with the eave and create a chalk line vertically, which will be the point where you will begin installing your shingles, moving in a clockwise manner approaching the rakes. To install the 1st row or line of shingles (usually called the starter strip) start by cutting the tabs of 3-tab shingles and place on them an adhesive strip ( the self sealing ones ) pointing upwards alongside the eave. This starter row should overhang just a little bit usually around a ¼" to 3/8 of an inch over the edge of the drip.
4. Now nail the starter strip of shingles, over and as flush as you can with the starter course using 4 roof nails for each shingle and then begin creating chalk lines horizontally up the roof to make sure that the rows are straight. Be sure and leave at least five inches of shingle tabs exposed just approximately where the tabs lower edge joins the cutouts top.
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