2 Layers Of Roof Shingles

Pros to overlaying a shingle roof.

2 layers of roof shingles.

A roof is one of the most vital components of a house. Shingle manufactures tend not to want 2nd layer as additional variables come into play with warranties. To calculate shingle weight you ll need to understand bundles and squares. Warranty voided most shingle manufacturers void their warranty when shingles are applied over a existing roof.

Here are the pros and cons. Though both these points are valid you will end up spending the same amount of money or more later to. 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. A case for two layers of roof shingles.

The average price range to shingle a 3 000 square foot shake roof is between 5 000 and 12 000 low cost for installation is around 3 600 and high cost is about 120 000 for a single square of roofing 100 square feet the average price is 170 to 400. 01 16 2012 08 43 am 14. Pros and cons of adding a second layer of shingles. 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.

Not all roofs are candidates and not all roofers can do a good job on 2nd layer install. The layers beneath the top layer and the decking plywood beneath will have to be paid for by the homeowner. Asphalt shingles come in two major types 3 tab and architectural. Not very fun huh.

It has just one layer so it goes on fast and can be installed by a homeowner. The main case for adding a second layer of shingles is simplicity. A square of shingles is a roofing term for 100 square feet of material. 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.

Replacing a roof can be very expensive and exhausting at the same time. It typically takes 3 bundles of shingles to cover a square of roof. 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. There are only two companies that know of that will offer coverage.

Roll roofing is different. Most building codes allow this but is it a good idea. 3 tabs are less expensive but also less durable have lower wind resistance and have a flatter appearance. A typical roof has three layers a felt layer and two layers of overlapping shingles.