What is Built Up Roofing – An Overview?
What is built up roofing? It is also known as tar roofing and patchy roofing. As its name implies, it is a roof comprised of tar sheets. These tar sheets are tightly rolled together, then crumpled, and finally stacked to make a strong roof. Often tar roofs are made with asphalt shingles. But today, there are more advances in what is built up roofing.
BUR or built up roofing is among the most flexible materials used for covering flat or low slope roofs. The layers are then bound together using bitumen (an asphalt binding agent) to form quite a sturdy roof system. The two kinds of built up roofs most frequently employed are classified by the kind of tar, or tar backing, that’s used. In addition to bitumen, there are also two other substances, such as coke or coal tar, that may be employed. But what makes them particularly attractive is the fact they are very economical roofing systems.
In addition to the cost effectiveness of what is B rated roofing system, it can also provide superior protection against the elements. This is because, unlike asphalt shingles, which can easily break and peel off a low slope, what is B rated roofing material cannot do so. The protection that what is B rated provides extends well beyond roof repair needs. It can also guard against extreme weather conditions, such as heavy rains, strong winds, hurricanes, and snow storms.
However, the major limitation of what is B rated roofing material is its inability to offer any sort of insulation. Because asphalt shingles, when applied directly to a flat surface, are incapable of creating any sort of barrier to air, what is B rated roofing can do is act as a chimney starter. Once warm air enters the chimney, it quickly follows by cold air, which in turn can cause condensation problems. For this reason, it is always recommended to call a professional roofer to recommend the best solutions for your home.
Another limitation of what is B rated roofing is that it cannot be used on a low slope. Although a low slope roof is preferable for many different types of residential buildings and even industrial buildings, what is B rated is not able to withstand strong gale force winds. Even though plywood has low moisture content, it does not possess any type of thermal insulation property that asphalt shingles do. The end result is that what is B rated often ends up costing homeowners more money than what is R rated.
Ultimately what is built up roofing is an extremely important decision because it will ultimately affect the value of your home. It is a decision that should be considered very carefully. For this reason it is important to contact several roofing specialists before making the final decision. This way you will have a well-informed perspective on which roof will best fit your needs.