Underlay Felt Flat Roof

Synthetic underlayment technically non bitumen synthetic underlayment is the preferred underlayment of most roofing professionals today.

Underlay felt flat roof.

It starts with installing solid decking usually plywood or oriented. United roofing gator skin synthetic roof underlayment 42 in x 285 8 ft 1 000 sq ft synthetic roof underlayment. The substance itself is made from bitumen which comes from the distillation of crude oil that has been either mixed with sand or crushed limestone. This layer is not bonded to the decking so that the decking can move without damaging the felt roof.

Laying the top bonded layer of top sheet felt. Laying the second bonded layer of underlay felt. How to install felt underlayment for a new roof. Laying the first nailed layer of underlay felt.

Installing a roof is much more than just nailing shingles onto some boards. Depending on local weather waterproof underlayment may be recommended. Bituminous felt is a form of waterproof sheeting that is used to cover flat roofs or as an underlay beneath slate or tile roofing. Felt paper is applied across the entire roof deck.

It protects your roof deck while you work on it roofing felt prevents the deck from being exposed to the elements before or while the shingles are being applied.