Residential Flat Roof Detail

Flat roof systems are a bit of an outlier.

Residential flat roof detail.

A flat roof usually consists of the following. Flat roof construction for residential. Of course you don t need to live in a modern house to deal with a flat roof. This could mean flat roofs may not raise the same red flags they used to.

Flat roofs make replacing a roof a challenge. Having a manual for warm flat roof construction with details and a summary of rules to follow helps. However in many u s. But now flat roofs often are constructed with fewer layers because of improved waterproofing technology.

Yet for historic modern style buildings like this old house s cambridge tv project flat roofs are at the core of the architecture meant to reflect the broad horizontal lines of the natural landscape. A roof is considered to be flat when it is of a slope of 1 5 o to the horizontal. The basic construction of a flat roof starts with roofing timber that is laid across two upright items usually two walls. Of all these membrane types epdm synthetic rubber is the most common single ply membrane roof material in both residential and commercial use.

There s a lot to know about flat roof systems and how they. 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. Cities with older housing stock think federal hill in baltimore or alexandria virginia s old town the roofs are often flat or have very low slopes. Most modern residential homes have relatively steep pitches.

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. That will help you remember certain factors and details to build the best possible flat roof. Of course flat roofs are not flat but have a very slight roof pitch of between 1 4 to 1 2 per foot. Just enough slope to drain water but also flat enough to be a problem if not constructed properly.

Flat roofs aren t architecturally logical as rain and snow will shed much more quickly off a sloped roof. 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. Flat roofs are hard to replace. Ultimately a flat roof should play a part in a total architectural composition and has the ability to enhance the aesthetic and practical outcomes of a home.

Pros and cons for flat roof materials 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. A typical flat roof repair costs at least 350 400 and involves locating sources of leaks and patching the seams or holes. Flat roofs come in many shapes and sizes which include parapet roofs roof decks and green roofs to name just a few of the options available. Although flat roofs are cheaper to build than pitched roofs they have a shorter life span.