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

There are many different aspects of asphalt roofing. In this article, we will look at some of the key factors that go into determining how well a shingle will adhere to a roof. We’ll also discuss some of the important terms that you should be familiar with, including Melt-viscosity, penetrating values, and weight. You can also learn how these metrics affect the cost of shingles.

 Asphalt Roofing Metrical


Penetration values

When determining the durability of asphalt roofing, you should look at the penetration values. These numbers measure the resistance of asphalt to abrasion and other forces. Generally, these values are based on the hardness of asphalt, which varies from 40 to 80 percent. Increasing the hardness of asphalt will increase the penetration value, but decreasing it will decrease the softening point. To calculate the penetration value, you should look at the softening point and the penetration ratio of each type of asphalt.

There are two main methods to calculate the penetration values of asphalt. The first uses a brass cup filled with asphalt and heats it at a steady rate. The second method uses a small flame to flash the sample. The temperature recorded at this instantaneous flash represents the flash point. As a result, you can find out the maximum penetration value of an asphalt roof by using this method. This method is also very popular with architects and engineers because it can help them decide which material is the best for a given building.


When choosing an asphalt shingle, it’s important to understand the range of melting viscosities available. Melt-viscosity refers to how much the material can stretch or harden. A suitable range is between 130 and 420 cps at 400deg F or 204deg C. The first melt viscosity can be any suitable range, ranging from 425 to 500 cps at 400deg F.

The NIST (National Institute of Standards and Technology) has conducted studies on asphalt viscosity, which governs how well it flows and adheres to reinforcing felts. Using the NIST’s recommendations, roofers should apply between 1 kilogram per square meter and two kilograms of asphalt per 100 square feet. Proper application techniques will ensure that the recommended interply asphalt is applied to the roofing substrate. The ideal viscosity of asphalt for roofing is 0.125 Pa.s, while a 75cP (0.75 Pa.s) is suitable for mechanical spreader application.

For the development of a more accurate specification for asphalt materials, rheology can be integrated into the process. For example, ASTM D36 and D5 are both used to measure the properties of asphalt. They measure the melt-viscosity of asphalt materials at 25deg C and 400deg F. The Brookfield viscometers, Model LV and RV, can measure the viscosity of asphalt materials. For a proper choice of grade, it’s important to understand the complete flow curve. Rheological data can also be used to specify processing conditions.

Weight of granules

Asphalt shingles are largely made of asphalt with added granules to provide protection from UV rays. These granules are manufactured from natural stone and crushed and screened to give them various gradation sizes. During the manufacturing process, they are selected in certain proportions in the overall blend mixture. The gradation distribution of asphalt shingles is determined by the size and number of granules.

As the weight of the granules in asphalt roofing increases, the thickness of the roofing will also increase. Roofing materials with overlap will have a higher weight per square foot. A granule can weigh from 30 to 40 percent less than a shingle that is new. Nevertheless, a shingle with an old age is less than half the weight of a brand new one.

Cost of shingles

If you’re buying new asphalt shingles for your roof, you may wonder what it will cost in metric. The answer depends on your location, the complexity of your project, and whether you need professional help. Asphalt shingles are one of the least expensive types of shingles available, but they also have the lowest price per square foot. To find out how much asphalt shingles will cost in metric, compare prices for the various types of shingles.

In metric, the cost of asphalt shingles is measured in kilograms. A kilogram weighs approximately one pound. They are sold in multiples of ten kilograms, and there are many shades of asphalt shingle. The difference between metric and imperial units is quite minimal, making them a great choice for international shipping. However, if you plan to ship them to Europe, you should know that metric units are not available in every country.


The cost of asphalt shingles in metric is quite reasonable, and they are a great choice for international shipping. However, be aware that not every country uses the metric system, so you may need to convert the prices when shopping in Europe. Thanks for reading! We hope this article was helpful.

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