Flat Roof Details Pdf

A roof must have some slope in order to shed rainwater.

Flat roof details pdf.

This could mean flat roofs may not raise the same red flags they used to. Flat roofs are hard to replace. 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. It is more accurate to describe such a roof as semi flat.

Cad pdf drawings testing bim. Location page 5 factors such as the amount of sunshine temperature surrounding buildings or wind affect a flat roof and need to be considered. Warm and cold roofs householder s guide to flat roofing in a flat roof the waterproofing is always supported by a structural roof deck. It dealt in detail with flat roof constructions and can be regarded as one of the first guidelines for such roofs fig.

The ceiling if any is usually fixed directly to the underside of the joists. Flat roof construction for residential. Airtightness page 7 very good levels of airtightness are required for all flat roof constructions. Although flat roofs are cheaper to build than pitched roofs they have a shorter life span.

Valley detail clip valley detail one piece vented ridge detail. But now flat roofs often are constructed with fewer layers because of improved waterproofing technology. The basic construction of a flat roof starts with roofing timber that is laid across two upright items usually two walls. This is usually a timber boarding of some type which in turn is supported on joists.

So in reality flat roofs are never totally flat but rather have a slight fall the minimum of a flat roof is 1 50. A blower door test is strongly recommended. The overhang of the roof at the wall is called the eaves. A roof is considered to be flat when it is of a slope of 1 5 o to the horizontal.

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. Pac ss ridge vent slope to high wall spec sheet download. That will help you remember certain factors and details to build the best possible flat roof. Factors that affect a flat roof construction.

Slope to flat roof spec sheet download.