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How Does Asphalt Roofing Metrical Cost Affect the Cost of Shingles?

Aug 6

How does Cost of Asphalt Roofing influence the cost of Shingles

There are numerous aspects of asphalt roofing. We will be discussing some of the factors that determine the degree to which a roofing shingle will stick to the roof. We will also go over essential terms such as melting viscosity and penetrating value. It is also possible to learn about how these metrics affect the price of shingles.

Penetration values

The penetration values indicate the roofing's durability. These numbers measure the strength of asphalt against abrasion and other forces. These values are generally dependent on the hardness of asphalt, which can range from 40 to 80 percent. The higher the asphalt's hardness will increase the penetration value however, reducing it will decrease the softening point. The ratio of penetration and the softening point of every asphalt type are key factors to determine the value of penetration.

Two main methods can be employed to measure asphalt's penetration rates. The first uses the brass cup which is that is filled with asphalt and the cup is heated at a steady rate. The second method employs a small flame to flash the sample. The flash point refers to the temperature at which an instantaneous flash happens. This means that you can calculate the maximum penetration rate of an asphalt roofing by using this method. This technique is extremely popular with architects and engineers as it lets them determine the most suitable material for the particular building.


When selecting an asphalt shingle, it is important to know the variety of melting viscosities that are available. Melt-viscosity is the measure of how much the material can stretch or harden. An acceptable range is between 130 and 420 cps, at 400deg F/204deg C. But the melting viscosity of the first melt could be any of the ranges between 425 and 500cps at 400deg F.

NIST (National Institute of Standards and Technology) has conducted research on asphalt viscosity. This is the property that determines the degree to which asphalt flows and sticks to reinforcing feels. According to the NIST roofers, they should apply between 1 and 2 kg of asphalt per square meters. The roofing substrate should be applied using proper methods. In the case of roofing, the ideal asphalt viscosity is 0.125 Pa.s. 75cP (0.75 P.s.) is suitable for mechanical spreader applications.

Rheology is a method to create a more precise specification for asphalt-based materials. ASTM D36, D5 and D5 are utilized to assess the properties of asphalt. They determine the melting viscosity of asphalt materials between 25deg C and 400degree F. The Brookfield viscometers, Model RV and LV, are able to determine the viscosity of asphalt materials. For a proper choice of grade, it is essential to understand the complete flow curve. Rheological data can be used to determine processing conditions.

The weight of granules

Asphalt shingles are mostly made of asphalt with added granules to protect against UV Rays. They are made of natural stone, then crushed and screened to produce a variety of sizes. They are included in particular proportions in the final blend mixture when making the product. The distribution of gradation in asphalt shingles is determined by their size and the number of granules.

As the weight of the granules in asphalt roofing increases as does the roofing's thickness will rise. Materials that have overlap be heavier per square foot. Granules can weigh up to 30-40 percent less than a brand new shingle. But a shingle of an older age weighs only half that of a new one.

Cost of shingles

You may be interested in the cost of asphalt shingles for replacing your roof. It depends on the location you live in the project's complexity, where you live is, and whether professional assistance is needed. Asphalt shingles are the least expensive kind of shingles and they are also the lowest price per square foot. To figure out the amount asphalt shingles cost in metric units, you can compare prices for the various types of shingles.

Asphalt shingles are measured in kilograms. One kilogram is approximately one pounds. There are numerous colors of asphalt shingle and they are available in multiples of ten kilograms. They're a good choice for international shipping because there is hardly any distinction between imperial and metric units. But, if you're planning to deliver these units to Europe it is important to know that imperial units aren't readily available in every country.


The price of asphalt roofing in metric is reasonable, and they are an excellent choice for international shipping. Be aware, however, that not every country follow the system of metric. You may have to convert the price if you shop in Europe. Thank you for taking the time to read! We hope this article has been beneficial.

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