Why Do Roof Over Instead Of Shingle Roof

This type of roofing complements many architectural styles as well as providing a few benefits over shingle roofs.

Why do roof over instead of shingle roof.

You can save. Asphalt shingles can be laid over cedar shakes or shingles however this is a roofing project best left to pros. Stone coated metal roofing or stone coated steel roofing has a deep architectural profile and can mimic the look of asphalt shingles wood shakes or clay tiles this premium roofing material comes with warranties up to 50 years and is rated highly for resistance to winds hail and fire. Beveled wood pieces called horsefeathers must be laid along the thick edges of the shakes to make a fairly flat surface.

When roofing over your existing shingles can be a good idea. 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. Made from clay or concrete they re a visually appealing. Before you reshingle a roof read our step by step guide for adding new shingles over old ones.

Many homeowners opt for tile roofs instead. Why installing new shingles over old shingles can be good. When you should tear off your roof and start from scratch instead. That s a lot of extra weight putting added stress on the roof decking.

Good quality composite shingles can weigh 350 to 450 pounds per square 100 square feet of roofing installed. Apart from the problems going unnoticed during the actual shingle over there are long term effects to consider as well. Roofing felt is comprised of a base made from natural materials such as wood cellulose or synthetic ones such as fiberglass or polyester and then coated or saturated with a protective coating such as bitumen asphalt which repels water but still allows the product to breathe. Metal roofs generally can run from 120 to 900 per 100.

Installing new roof shingles over old effectively doubles the weight of the roofing so you have to. Though you ll get more life out of a metal roof you ll pay the price at the time of installation. Long term effects of shingling over shingles. Pramote polyamate getty images.

Chances are your roof structure was designed for a dead load of one layer of shingles plus extra for snow and a safety margin. Shingle roofs are cheaper up front. Let s start with the good. Roofing over your existing roof.

But actually traditional asphalt shingles aren t the only option. Cons there are several downsides to recovering an existing roof. Most of them have to do with the fact that what you d be saving in time and money right now you ll have to pay for somewhere down the road. All shingle manufacturers honor the warranty whether their products are used for a reroof or a new roof.