Weight Of 3 Layer Felt Roof System

Melt the bitumen by heating on the underside of the membrane from a gas torch.

Weight of 3 layer felt roof system.

Second layer is a sanded underlay which is to. Please contact us if you have any queries by clicking here. Felt tar and slag roofing 3 ply 4 5 lb m ft 2 22 kg m 2 felt tar and slag roofing 4 ply 4 8 lb m ft 2 23 4 kg m 2. Each of the three layers is laid in a half lap system so any joint in the roof is as far away as possible from another joint.

Anderson tecnatorch sbs torch on mineral felt capsheet is used as the final layer of the felt roofing process. 3 layer felt roofing system expert installation of 3 layer felt roofing systems the first layer is a 3g perforated membrane felt which is loosed lay onto the primed deck. Atlantic single ply system 17000 system 17000 plus system 5000 classic commodity systems. They had a stereotypical belief they were only good enough for your shed or garage.

Fitted using a blowtorch the 3 layer felt roof system benefits from being more stable than the older methods. The 3 layer felt roof system is also versatile when it comes to appearance. The weight of roofing constructions above the truss rafter may be estimated with the calculator below. When it comes to estimating the weight of an existing roof field verification of the in place construction is necessary.

Of course how many rolls you need will depend on the size of the roof so ensure you measure correctly. You can return to viewing our roofing products by clicking on the below titles. The products used today are a 3 layer membrane system applied with the use of a gas gun. Three layer felt system.

If the slope is between 3 12 and 4 12 use two layers of 15 felt for asphalt shingles. Use our table below to compare membrane thickness and weight for our range of flat roofing. If the slope is greater than 4 12 which provides more water drainage from the roof use one layer of 15 felt. This includes the roof deck and the supporting structure typically roof trusses and or rafters as well as the roof system itself.

The type and amount of roofing felt to apply varies according to roof slope. Typically it s applied as a 3 layer system usually consisting of a perforated underlay a 2mm underlay layer then thick 4 5mm felt. They are no longer laid with hot bitumen and have stone chippings put on top. This type of felt roof comes on rolls and is laid with the aid of a very large blow torch that heats and melts the rear of the felt melting it onto the roof structure below.

Don t forget to add all roof assembly materials when calculating total roof weight.