What Are Roof Shingles Made Of

Shingles made with asphalt as the main ingredient are the most popular shingles sold in the U.S. today, and so the asphalt used at these roofing facilities is processed to meet the stringent quality requirements needed to create strong, yet flexible, shingles.

Are asphalt shingles toxic?

Modern shingles can be toxic during installation, but they will usually not be harmful unless you’re trying to collect potable rainwater from the roof; chemical constituents in the shingles can find their way into the run-off water. Other than that, shingles themselves are not necessarily toxic per se.

What is the most common roof shingle?

The most common residential roofing material used in the United States, asphalt shingles are popular because they are economical and easy to install. These shingles can be reinforced with fiberglass or organic materials (cellulose) without changing the appearance of the shingle.

Are roof shingles made from asphalt?

Asphalt is the basic water-resistant ingredient in asphalt shingles. After that, a fine mineral powder is mixed with the asphalt, which enables the installed shingle layer to be fire and weather resistant. This asphalt “coating” is pressed on the top and bottom of the fiberglass mat.

Do shingles have fiberglass in them?

Fiberglass shingles are made of a woven fiberglass base mat, covered with a waterproof asphalt coating, and topped with ceramic granules that shield the product from harmful UV rays. Because of the composition of the fiberglass mat, less asphalt is needed to give the shingles their durability and strength.

Do asphalt shingles contain silica?

Silica dust is also present in asphalt roofing material, making it a health concern for those who perform roof services. Even those who do roof replacement services and work on existing buildings can be affected by the silica dust present in the asphalt granules and dust commonly used in various roofing materials.

Which is better shingle roof or metal?

Metal roofing is durable and routinely lasts 2-4 times longer than shingles. Homeowners like the idea of buying only one more roof in their life instead of potentially several. Metal roofing outperforms shingles in cases of hail and other severe weather events.

Are Fibreglass shingles better than asphalt?

Strength: Although fiberglass shingles are thinner and lighter than organic asphalt shingles, a high-quality product can last 20 years or more, as they won’t dry out or change their shape. Environmental Impact: Funnily enough, fiberglass shingles are better for the environment than organic asphalt shingles.

How long are shingles good for?

Your asphalt roof is about 20 years old For a standard 3-tab asphalt shingle roof, that’s 25-years. As long as your roof has been properly ventilated and installed you should get pretty close to that 25 years of roof life.

What are shingles made?

Shingles are held by the roof rafters and are made of various materials such as wood, slate, flagstone, metal, plastic, and composite materials such as fibre cement and asphalt shingles. Ceramic roof tiles, which still dominate in Europe and some parts of Asia, are still usually called tiles.

How are asphalt shingle made?

The Process of Manufacturing Asphalt Shingles Fiberglass mat is mounted and placed into the roofing machine. Hot asphalt is sprayed on one side of the base material. The matting is transformed back into accordion-style folds, as the asphalt coating cools. Asphalt coating is applied on both sides of the mat.

What type of asphalt is used in shingles?

Shingle Composition Asphalt used in shingles is considerably harder than asphalts used in pavement. Organic shingles contain 30 to 36 percent asphalt. Fiberglass shingles contain 19 to 22 percent asphalt.

How can you tell the difference between asphalt and fiberglass shingles?

Fiberglass asphalt shingles differ from organic asphalt shingles in that they do not have the paper or felt base. They have a fiberglass base. Fiberglass asphalt shingles begin with a mat of wet fiberglass held together with urea-formaldehyde resin.

How can you tell if shingles are organic?

There are several signs of organic shingle damage including: pitting, granule loss, discoloration, cracking, blistering, or curling of the shingle. These signs are especially apparent where the roof is exposed to the most direct sunlight, such as south facing sides.

Are fiberglass shingles fireproof?

Fiberglass-Based Asphalt Shingles The fiberglass-based variety also offers excellent fire resistance when installed with fire-code-compliant underlayments.

Are tilers at risk of silicosis?

Exposure to RCS over many years, or in extremely high doses, can lead to serious lung diseases, including fibrosis, silicosis, COPD and lung cancer. These diseases cause permanent disability and early death: it is estimated that over 230 workers die every year from lung cancer caused by exposure to RCS.

Do roof tiles contain silica dust?

Silica occurs in many types of stone and in concrete, including roof tiles and slate. In dust form it will be released during cutting or grinding, and when sweeping/cleaning work areas.

Is it OK to put a metal roof over shingles?

In almost every case, the answer is yes, you can lay down a new metal roof over an existing shingle roof. This is one of the many reasons metal roofs keep growing in popularity – their installation doesn’t require completely tearing off the existing roof, which is a time-consuming and expensive job.

What are the disadvantages of a metal roof?

Disadvantages of metal roofs Affordability. Metal roofs can be as much as two or three times more expensive than other roofing materials. Noisiness. Expansion, contraction and fasteners. Inconsistency of color match. Performance.

Can you walk on a metal roof?

Most metal roofs are manufactured and installed in such a way as to be safe to walk across without the worry of damaging the roof. You might mark or scuff the finish or paint on your metal roof, but average foot traffic shouldn’t significantly impact the longevity or performance of your metal roof.