3 Layer Flat Roof System

Bitumen roofing is also available in 1 2 or 3 ply.

3 layer flat roof system. The covering which makes them water tight can be achieved using various products with 2 standing out as the industries norm. The 3 layer felt roof system is also versatile when it comes to appearance. Warranty on your shingles and all qualifying gaf accessories plus non prorated coverage for the first 10 years. I would strongly recommend you hire a licensed and insured roofing contractor to perform the installation for you.

The 1 ply material is not durable and if used can pose certain problems such as breaking down prematurely while the 2 and 3 ply material roofs cost significantly more to install which can make this one of the most costly types of flat roofing products around. Light weight shed roofing felt is not suitable for flat roof construction. Asphalt shingles typically can have one more layer added over the top two roofs total. In short any roof covering that can make a flat roof waterproof in one layer unlike roofing felt with its 3 layer system for instance.

For many years it was acceptable to put even the third layer. Fitted using a blowtorch the 3 layer felt roof system benefits from being more stable than the older methods. The underlying deck must be constructed of moisture tolerant materials such as 18mm wbp plywood or suitable chipboard stirling board on treated timber joists. Make sure the roof is clean dry and that all nail heads are flush with the deck.

Flat roofs usually come with a 10 to 20 year warranty but can last 25 years if you build the roofs right and maintain them using commonsense rules. The first being a 3 layer felt systems and second grp glass reinforced plastic. Flat roofs are hard to replace. Pros and cons for flat roof materials.

Cost can add up quickly especially if you re a novice and have never attempted a 3 layer torch down roof installation before. But now flat roofs often are constructed with fewer layers because of improved waterproofing technology. All three types of flat roofing cost 250 to 350 per square 100 square feet but prices vary according to region and size of the roof. Install any gaf lifetime shingle at least 3 qualifying gaf accessories you ll automatically get.

This can include epdm rubber and fibreglass talked about above but commonly especially in the trade and in this article it refers to pvc tpo tpe and pib. 3 layer torch down roof total average cost per square foot 4 00 4 72 5 55. This could mean flat roofs may not raise the same red flags they used to. Some observers suggest it s harder to replace a flat roof than a traditional pitched shingle roof because of the labor required to remove its layers especially on older flat roofs.

The majority of all loft conversions will have a flat roof constructed to them. On most flat roofs such as epdm tpo or modified it is perfectly acceptable to two layers of roofing. Three layer felt system.