What is a 3 layer felt roof system?
Torch-on roofing, or torch-down roofing as it is also known, is a flat roof covering solution that involves three layers of modified bitumen (felt) melt-welded onto the roof surface and each other with the use of a blowtorch to create an impenetrable, waterproof seal.
What is 3 ply built up roof system?
A 3-Ply Hybrid BUR differs from other membrane options due to its combination of a 1ply base sheet with two plies of glass felt that enhances the performance of the membrane with a quicker installation time and less weight on the roofing system itself.
What is the average lifespan of a 3 layer felt roof system?
Felt roofing Most felt roofs are guaranteed between 10-20 years, but if treated well and well maintained they can last longer.
What is the best felt for flat roof?
EPDM Membranes Quite possibly the best flat roofing membrane, EPDM is a relatively low-cost flat roof material that offers a number of significant advantages. Clean, straightforward installation, incredible strength, a long lifespan, and a smart finish combine to make EPDM membranes a difficult one to beat.
Which is better felt or Fibreglass?
Fibreglass is much more durable than felt and stronger too. It has no seams, so it’s less likely to fail and let water in, and it’s relatively easy for a professional to repair if damaged. The downside to fibreglass roofing is its cost. It typically costs 10 times more than felt, depending on the brand used.
Is TPO better than tar and gravel?
We most certainly advise customer to use TPO instead of a Tar & Gravel roof based on what we’ve mentioned above. It’s cheaper, more environmentally friendly and, generally, easier to repair should something happen.
How long should a built up roof last?
20 to 30 years
In general, a properly installed built-up roofing system will last 20 to 30 years.
What is the difference between 15 pound roofing felt and 30 pound felt?
While #15 is a good option for most roofing jobs, #30 provides more protection and performance for steep roofs and flat roofs. But if your roof has a steep pitch, #30 is a better option because it is thicker and tears less during installation. With #30 you get a thicker layer of underlayment and protection.
Can you put felt over old felt?
It’s best to tear down to the bare roof deck so you can also check for any decking damage. But you can also add another layer of felt on top of existing. This will add additional thickness to the roof, so be sure that fasteners (nails) are long enough to penetrate both layers.