Asphalt Flat Roof Detail

Let owens corning help you determine when it is time for a new roof and then let us help you choose the shingles for your roof that are right for you.

Asphalt flat roof detail.

A flat roof s design is both efficient and economical. Just enough slope to drain water but also flat enough to be a problem if not constructed properly. This could mean flat roofs may not raise the same red flags they used to. In general materials used on flat roofs cost less than ones used on sloped ones.

Tpo is 1 70 per sq foot. Experience the total owens corning roofing system and high quality roofing shingles. Modified bitumen and rolled asphalt roofs cost 1 30 2 20 per sq foot depending on the number of plies. Other flat roof construction details often refer to the types of flat roof coverings.

Pvc is 1 90 per sq foot. 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. Cad details document name pdf dwg download all cad construction details 37 1 mb 3 4 mb mc01 identification of roof areas 694 kb 167 kb mc01a single layer underlayment 678 kb 302 kb mc01b double layer underlayment 711 kb 322 kb mc02 vent pipe flashing 626 kb 349 kb mc03 valley. Astm e 1592 physical testing was performed on three test roof assemblies in order to determine the wind uplift resistance of an rsprs installed over existing structural metal panel roof systems fastened directly into purlins.

Of course flat roofs are not flat but have a very slight roof pitch of between 1 4 to 1 2 per foot. A waterproof exterior layer is essential and there are a number of options including bitumen based felt or asphalt epdm rubber and pvc based systems as well as cold applied liquid systems bitumen coverings. Flat roofs are hard to replace. But now flat roofs often are constructed with fewer layers because of improved waterproofing technology.

Flat roofs are nothing new nor are some of the proven materials that cover these often expansive roofs such as those found on factories warehouses big and small box stores apartment buildings large public structures and schools universities. Epdm is 1 50 per sq foot making it the cheapest single ply membrane. Due to their size the technical guides have been divided into sub sections. Please select a section to open below.

Wind uplift is a primary concern when installing a retrofit single ply roof system rsprs over a structural metal panel roof. We can even help you find a professional to install it. Each document will open in a new window. Asphalt roofing systems that really resist structural and thermal movement even in temperatures below 0.