Residential Flat Roof Detail

A flat roof usually consists of the following.

Residential flat roof detail.

Waterproof membrane to prevent water penetrating the structure and interior of the. Flat roofs are hard to replace. This could mean flat roofs may not raise the same red flags they used to. Choosing a flat roof how to find the best options for your commercial roofing project.

Flat roof construction for residential. Flat roofs aren t architecturally logical as rain and snow will shed much more quickly off a sloped roof. The major difference between the warm flat roof and the cold flat roof has to do with the air flow between the roofing timbers known as joists that help to hold up the roof. However depending on the severity of the damage and the type of material installed repairing a flat roof can cost as much as 600 800.

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. 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. 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.

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. Pros and cons for flat roof materials. Of course you don t need to live in a modern house to deal with a flat roof. A roof is an integral part of a building and people try to personalise the roof designs to achieve optimum architectural splendour.

Poorly constructed roofs endanger the people living in a building so you need to make the roof compatible to the rest of the building in a well engineered style. Although flat roofs are cheaper to build than pitched roofs they have a shorter life span. A typical flat roof repair costs at least 350 400 and involves locating sources of leaks and patching the seams or holes. Pvc membranes are easy to maintain and repair.

In the warm flat roof construction there is insulation packed into every possible space where air can flow. A roof is considered to be flat when it is of a slope of 1 5 o to the horizontal. 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. The good news is that there are material options for your flat roof beyond traditional hot mopped built up roofing that will increase the reliability of the flat roof.