How To Re Roof Over Asphalt Shingles

If you re considering getting a metal roof you may be wondering if you can install it over shingles.

How to re roof over asphalt shingles. This article discusses how to prepare an existing asphalt shingle roof for a roof over or for re roofing with new asphalt shingles. This article series discusses best practices in the selection and installation of residential roofing. Run the shingles long over hip ridges and rakes and in the valleys. Asphalt shingles can be laid over cedar shakes or shingles however this is a roofing project best left to pros.

We re going to answer that question in this blog so keep reading or give our legacy service team a call at 215 798 9790. When you re all done installing the shingles snap lines and trim the shingles to the line photo 11. Re roofers have tricks to lay new roof shingles over old so that the same step ups between courses are maintained but if any old shingles are cupped curled or otherwise misshapen those defects will telegraph through to the new layer. Place the ridge cap shingles over the roof ridges.

Ensure that each cap overlaps the one below it by 1 4 inch 7 cm. The shingles shown here are commonly called architectural. Place and nail the shingles from the bottom of the roof to the top. The cap of each shingle should fall evenly in half over each side of the ridge.

Some shingles are energystar rated. Cut the shingles to size with a utility knife fitted with hook blades. Asphalt roof shingle re roofing advice. Beveled wood pieces called horsefeathers must be laid along the thick edges of the shakes to make a fairly flat surface.

If the job is done correctly with the new layer of shingles laid flat over the existing shingles the old roof cushions the new one and serves as a secondary barrier should wind or water ever break through the new shingles. All shingle manufacturers honor the warranty whether their products are used for a reroof or a new roof. Nail each side of the cap shingle into the roof. When comparing these products look for the highest numbers in solar reflectance and thermal emittance both on a.

Cool roof asphalt shingles help lower that difference to just 5 or 10 degrees by using granules coated with a highly reflective pigment.