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all asphalt roofs can be re-reroofed based on your states laws
basically if you have only one layer of roof on your existing roof you are legal to replace it with a "go over" roof, any more then 2 layers is considered bad due to weight, and can be illegal in some areas/states.
this is Avery good way to save alot of money on a new roof as there is no riping labor or waste fees!!!!
you can save money by roofing over an existing layer of rooing, but make sure they check for any rotten wood that may need to be replaced. Otherwise you'll be spending more money for a roofer to come out and repair both layers.
Just a professional opinion:is always better to remove the old roof and start over.
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Are tin roofs better then asphalt roofs?
Metal roof is very expensive and not easy to install.
What are three roofs type?
Wood, asphalt, torch-down
Metal Roofs are Three Times Costlier Than Traditional Asphalt?
Metal roofs cost about three times the amount of conventional asphalt roofs. Several factors contribute to cost, including higher cost of the materials themselves. The installation process also drives up the cost due to time involved as well as the process, which requires specialized installation technicians. Metal roofs take approximately two to three times longer to install. Although costlier than asphalt roofs, metal roofs are comparable in price to cedar shake and tile roofing. Metal roofs, however, are cooler, producing energy savings that will eventually offset materials and installation costs.
Tip for Installing Asphalt Shingles on Old Roofs vs. New Roofs?
Asphalt shingles are some of the most widely used mediums for roofs as they are generally more inexpensive than other types, and they are easy to work with. Whether you're applying those asphalt shingles to an old roof or a new roof, it's helpful to know that the application process is generally the same for all. The important aspect to remember is that when you are re-roofing, the most important thing to pay attention to is how you begin placing the asphalt shingles at the lower edge. Remember that mimicking the arrangement/pattern of the first roof could cause you to end up with waves in your roof design.
What is the Average life span of asphalt shingle roof?
This is a hard to answer question. Asphalt shingle roofs come in many grades measured in life expectancy, like 10-year, 20-year, 30-year, and 45-year.
How is a built up roof made?
Roofing composed of 3-5 layers of asphalt felt laminated with coal tar, pitch, or asphalt; top is finished with crushed slag or gravel; generally used on flat or low-pitched roofs.
What are the advantages of having a tin roof for one's home?
A metal tin roof has many advantages over an asphalt roof. Metal roofs last longer than other roofs, do not deteriorate as quickly, and can withstand more extreme temperature changes. Tin roofs are also less work to install, and can even lower your insurance costs.
What kinds of materials are used to make roofs of houses?
Wood, slate, metal sheet, asphalt shingle, concrete shingles, rubber membrane, fabric, baked clay tiles.
What does not allow precipitation to pass through?
Impermeable surfaces such as concrete, asphalt, and roofs do not allow precipitation to pass through. This can lead to increased surface runoff and potential flooding.
State the use for the bitumen fraction?
The primary use of asphalt/bitumen is in road construction, where it is used as the glue or binder mixed with aggregate particles to create asphalt concrete. Its other main uses are for bituminous waterproofing products, including production of roofing felt and for sealing flat roofs.
What is the difference between cold mix asphalt and cutback asphalt?
Cold Mix Asphalt is a mixture of aggregate and asphalt. Cutback asphalt is a liquid asphalt. Cold Mix Asphalt is a mixture of Aggregate and Asphalt. The Asphalt is usually am emulsion asphalt or a cutback asphalt. An emulsion asphalt is asphalt cement blended with water. Cutback asphalt is asphalt cement blended with a fuel oil, kerosene, or a naptha. The water, fuel oil, kerosene or Naphta evaporates and leaves the asphalt.
Ballasted Roofs are no Longer a Good Choice for Commercial Roofing?
Commercial flat roofs often carry an asphalt roofing system incorporating rocks or stones, and are defined as a ballasted roof. The difficulty with a ballasted roof is the issue of water pooling and excessive condensation leading to ice dams. With asphalt and gravel application, it is difficult to create a proper seal at all seams and connection points. Leaks on ballasted roofs are greatly more complex to diagnose as water travels in any direction on a flat roof. Contending with water pooling on a ballasted roof exacerbates the problem. Ballasted roofing is no longer an option that customers seek.
