Torch Down Roofing Underlayment

Priming the underlayment is not needed.

Torch down roofing underlayment.

As long as it is installed correctly bitumen prevents moisture build up without needing constant maintenance. Net membrane roll for low slope roofing in white. What type of underlayment should i use. Care must be taken to apply the overlay board correctly to prevent ponding which is when the roof is not level.

The roofing professional will lay down an overlay board or cover board next to support the torch down roofing membrane. Renting a large propane torch is. It is best to use 75 glass base underlayment. 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.

Use flashings approved by your building department. Gaf tri ply app smooth is a strong resilient membrane that is suitable for new or reroofing projects as well as for use as flashing. The mat is coated with durable app modified bitumen surfaced with granules and is designed for torch down application by professional roofing contractors. Secure it with roofing nails and then apply the torch down.

More product details close tri ply app granular cap sheet 39 625 in. These steps show a torch down method which looks a bit scary but actually is not too difficult. This membrane contains a core of nonwoven polyester mat that resists splits and tears. Gafglas 75 base sheet for built up roofing bur is a premium roofing sheet with a strong fiberglass mat to prevent asphalt bleed through.

This underlayment helps prevent the roof from developing condensation or moisture issues. I m going to be re roofing an addition on our house that is low slop and would like to use torchdown roofing. Torch down roofing consists of modified bitumen which is similar to asphalt. Modified bitumen roofing may have a granular surface as shown here or it may be smooth.

I originally was going to use ice and water shield but don t think i want to put torch down on top of that. If you install the smooth product cover it with aluminum coating.