Torch-down roofing, also known as modified bitumen roofing, is a popular roofing system that involves the application of multiple layers of modified bitumen sheets. These sheets are fused using a torch, creating a seamless and durable roofing surface1. Here are some key points about torch-down roofing:
Materials Used:
- Torch-down roofing is made from modified bitumen, which is asphalt with additives.
- The two main types of modified bitumen are:
- Atactic Polypropylene (APP): A form of plastic that enhances flexibility and responds well to heating and cooling.
- Styrene Butadiene Styrene (SBS): A rubber polymer that makes the bitumen flexible and has a lower melting point than APP.
Installation Process:
- Sheets of modified bitumen are rolled out onto the roof.
- A roofing professional uses a hand-held propane torch to heat the material and adhere it to the surface.
- Seams are melted together to create a waterproof seal.
Advantages:
- Ease of Installation: The self-adhesive feature simplifies installation, reducing labor time and costs.
- Flexibility: SBS remains flexible in various weather conditions.
- Durability: Torch-down roofing can expand and contract without melting or cracking.
- Energy Efficiency: Reflective options are available to reduce cooling costs.
Types:
- Two-Layer Systems: Base sheet and cap sheet.
- Three-Layer Systems: Base sheet, smooth cap sheet, and granule cap sheet for extended life and additional features.
Remember that proper installation by experienced roofing professionals is crucial for maximizing the benefits of torch-down roofing. Whether you have a flat roof or low-slope roof, torch-down roofing provides a strong and reliable solution for your home.
