Torch Down Roofing Underlayment

Gafglas 75 base sheet for built up roofing bur is a premium roofing sheet with a strong fiberglass mat to prevent asphalt bleed through.

Torch down roofing underlayment.

Priming the underlayment is not needed. Torch down roofing consists of modified bitumen which is similar to asphalt. Care must be taken to apply the overlay board correctly to prevent ponding which is when the roof is not level. This membrane contains a core of nonwoven polyester mat that resists splits and tears.

Use flashings approved by your building department. This underlayment helps prevent the roof from developing condensation or moisture issues. This video shows you how to use a torch and also tar to make a repair on a modified bitumen rubber flat roof. The sealed sheet also serves as an effective flame retarder for the application of torch applied modified bitumen membranes.

Secure it with roofing nails and then apply the torch down. These steps show a torch down method which looks a bit scary but actually is not too difficult. It is best to use 75 glass base underlayment. Torch down roofing is a type of roofing material that has been designed for low angle or flat roofs.

While it can last up to 20 years installing torch down roofing can be a dangerous process and as such tends to cost more than traditional roofing materials. As long as it is installed correctly bitumen prevents moisture build up without needing constant maintenance. If you install the smooth product cover it with aluminum coating. Renting a large propane torch is.

The roofing professional will lay down an overlay board or cover board next to support the torch down roofing membrane. The mat is coated with durable app modified bitumen and is designed for torch down application by professional roofing. I originally was going to use ice and water shield but don t think i want to put torch down on top of that. What type of underlayment should i use.

Tri ply 75 base sheet is a premium roofing base sheet constructed with a fiberglass mat reinforcing that is coated on both sides to ensure a closed sheet design to prevent asphalt bleed through.