Roof Shingles Over Shingles

Asphalt shingles can be laid over cedar shakes or shingles however this is a roofing project best left to pros.

Roof shingles over shingles.

Before you reshingle a roof read our step by step guide for adding new shingles over old ones. The next shingle should be placed and secured beside the first one. Installing new roof shingles over old effectively doubles the weight of the. This can lead to increased rot mold and decrease the structural integrity of your home.

Secure the shingle with nails one inch from each corner. Everything can be done at a distance. For installations not eligible for the gaf roofing system limited warranty see the gaf shingle accessory limited warranty. Good quality composite shingles can weigh 350 to 450 pounds per square 100 square feet of roofing installed.

All shingle manufacturers honor the warranty whether their products are used for a reroof or a new roof. The shingle should also hang about a quarter of an inch over the roof edge. Products with stainguard algae protection are covered by a 10 year limited warranty against blue green algae. The first shingle should be centered over the line that you marked with chalk.

How to shingle over existing shingles and how to shingle a roof how to install roof shingles shingle layout lines h. And your family can remain in the home during the installation or repair. The first thing to know about your roofing project. 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. Thanks to digital technology all of your decisions and interactions from selecting the right roofer to choosing a shingle to paying the contractor can be done at a distance. Our roofing tests focus on a shingle s strength and how well it maintains its appearance over time. We apply force to the shingles by using a calibrated machine called an instron that applies.

Chances are your roof structure was designed for a dead load of one layer of shingles plus extra for snow and a safety margin. Leak around a dormer which the homeowner never knew about long term effects of shingling over shingles. 2 stainguard algae protection is available only on shingles sold in packages bearing the stainguard logo. With a dual layered design that emulates the dimensionality of true wood shake landmark asphalt shingles offer the heaviest weight and widest array of color options in their class allowing you to create or re create the ideal look for your home with.

Roofing second layer of shingles roofing.