In some instances, three roofing layers may be allowed but are rare. Most areas permit two-layer roofing, such as Indiana. Why not more? There are pros and cons to having multiple layers, whereas the cons outway the pros.
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Pros of Overlaying A Roof
Roof overlay has become the most popular method of roof replacement. Many people utilize this method as it is the most affordable and relatively quick to install.
- It is faster. Instead of taking off, you’re adding on. You are eliminating the entire process of stripping the roof and cleaning up, therefore saving you time.
- It’s not as messy. Due to you not ridding the roof’s original layer, there will not be a mess to clean up after
- It is cheaper. The average re-roofing job costs approximately $600 less than a tear-off job. You will save from spending unnecessary money on dumpster rentals, disposal, and cleanup costs.
Cons of Overlaying A Roof
Eventually, you may resort to forfeiting the money and time replacing your roof sooner than you would with any other method.
- Added Weight. When you are over-laying your roof, you are essentially adding another roof on top of the original. The added weight puts a lot of stress on the roof decking, which is exceptionally worrisome in a climate that is prone to heavy rain and snowfall.
- It Gets Hotter. Think of it as putting on another coat on top of the one you already have on. Eventually, you will get horror as the coats extract combined heat. The same is happening with an over-layered roof. Having multiple layers of roofing is only going to make the roof hotter. The heat gets trapped within the layers and causes potential aging.
- Can’t Detect Leaks or Other Damage. When adding another layer to your roof, it will be difficult to inspect the first layer of the roof’s sheathing. There can be various issues gradually occurring with the original roof, which will be unbeknownst to you. There may be bad flashing, leaks, algae growth, damaged or rotted wood.
- Affects Inspection Reports. If you are a homeowner trying to sell your home, a home inspector will more than likely view your layered roofing as a negative. It can indicate that it will cause problems for the new homeowner. Having multiple layers, in some cases, can void or shorten your shingle warranty.
Materials Used For Residential Roofing In Indianapolis
Many materials are used for residential roofing, from concrete and clay tiles to asphalt shingles. Concrete or clay tiles are the most preferred roofing material amongst homeowners, and asphalt shingles are a popular choice as they are economical and simple to install. There are also other materials, such as metal, wood, asphalt, or a combination of wood and slate. Slate is a popular roofing material in cold climates.
When choosing a roofing material, it is important to consider the material’s lifespan. Asphalt shingles have a lifespan of 20-30 years, while metal has a lifespan of 40-70 years. Concrete or clay tiles have a lifespan of 50-100 years. It is important to also factor in the cost of materials and installation when deciding.