2 Layers Of Roof Shingles

If you have done some serious research on roofing then you have probably heard about adding a second layer of shingles on top of the old ones.

2 layers of roof shingles.

Not very fun huh. Asphalt shingles come in two major types 3 tab and architectural. There are only two companies that know of that will offer coverage. A roof is one of the most vital components of a house.

Pros to overlaying a shingle roof. By not removing the first layer of shingles homeowners would be able to save on labor costs and shorten the time frame of the job. 3 tabs are less expensive but also less durable have lower wind resistance and have a flatter appearance. It has just one layer so it goes on fast and can be installed by a homeowner.

Not all roofs are candidates and not all roofers can do a good job on 2nd layer install. Posted july 31 2018 by onpage marie. Shingles are the element that most homeowners are familiar with as it is the layer you can see from the outside of your home and it is an important aesthetic aspect. Shingle manufactures tend not to want 2nd layer as additional variables come into play with warranties.

A square of shingles is a roofing term for 100 square feet of material. A case for two layers of roof shingles. A couple of reasons are that two layers of shingles traps more heat and adhesion of the new roof is not as good as directly on sheathing. First of all multiple layers of shingles simply means layering a new asphalt shingle roof on top of the old one rather than stripping the roof completely to expose the sheathing and replacing it with new shingles.

Roll roofing is different. Replacing a roof can be very expensive and exhausting at the same time. Here are the pros and cons. To calculate shingle weight you ll need to understand bundles and squares.

A typical roof has three layers a felt layer and two layers of overlapping shingles. Most building codes allow this but is it a good idea. It typically takes 3 bundles of shingles to cover a square of roof. The layers beneath the top layer and the decking plywood beneath will have to be paid for by the homeowner.

Though both these points are valid you will end up spending the same amount of money or more later to. In the case of composition over shake shingle it is virtually impossible to obtain insurance for a home purchase these days. Warranty voided most shingle manufacturers void their warranty when shingles are applied over a existing roof. Pros and cons of adding a second layer of shingles.