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What Is Torch On Roofing

November 29, 2025

2 min read

Torch on roofing is a method where workers use a flame torch to heat and seal roofing materials onto your roof. The heat melts a sticky layer on the underside of the roofing material, which bonds it to the roof below. This type of roof lasts a long time and works well in many climates. Torch on roofing is common for flat or low-slope roofs on homes and commercial buildings. Many roofers choose this method because it creates a strong seal that stops leaks.

How Does Torch on Roofing Work?

Workers place modified bitumen roofing material on your roof deck. They use a handheld propane torch to heat the sticky underside of the material. The heat melts the adhesive, which sticks the roofing to the surface below. As they move the torch along, they press the material down to create a tight bond.

This process is fast and creates a watertight seal. According to RubyHome, modified bitumen roofing lasts between 20 and 30 years, making it a reliable choice for many homes.

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How Much Does Torch on Roofing Cost?

Torch on roofing costs vary by size and location. For a typical 1,700 square foot roof, you can expect to pay $6,800 to $68,000 total, according to RubyHome. The price depends on the quality of materials and local labor rates. According to industry data, roof installation costs range from $4 to $40 per square foot.

Your area matters a lot. Roofers in Massachusetts earn $72,390 per year on average, while roofers in other states earn less. This affects your total roofing bill.

What Are the Main Benefits?

Torch on roofing creates a strong, water-resistant seal. It works great on flat roofs where water can sit and puddle. The seal is seamless, which means fewer leaks. This type of roof can handle extreme heat and cold weather.

According to the U.S. Bureau of Labor Statistics, the roofing industry employs 135,140 workers who understand these materials well. Torch on roofing is fast to install compared to other methods. You also save time, which means lower labor costs.

Roofing TypeLifespanCost Range (per sq. ft.)
Modified Bitumen (Torch On)20-30 years$5.50-$7.50
Asphalt Shingles20-30 years$4.25-$8.25
Metal Roofing40-80 years$10.00-$17.05

Is Torch on Roofing Safe?

Safety is important with torch on roofing. Workers must be trained to use the torches correctly. There are fire risks if the flame is not controlled well.

According to OSHA, roofing injuries are projected to cost $2.8 billion by 2025. Companies with good training programs see 30 percent fewer safety incidents. Always hire experienced roofers who know how to handle the torches safely and follow all fire codes.

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If you need help with your roof, reach out to a trusted professional roofer for clear pricing and reliable service.