Flat Roof Details Pdf

The ceiling if any is usually fixed directly to the underside of the joists.

Flat roof details pdf.

A roof must have some slope in order to shed rainwater. Flat roof construction for residential. It dealt in detail with flat roof constructions and can be regarded as one of the first guidelines for such roofs fig. A roof is considered to be flat when it is of a slope of 1 5 o to the horizontal.

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. Pac ss ridge vent slope to high wall spec sheet download. Having a manual for warm flat roof construction with details and a summary of rules to follow helps. This could mean flat roofs may not raise the same red flags they used to.

Slope to flat roof spec sheet download. Roof of the building seems to float suspended from four welded solid. Factors that affect a flat roof construction. So in reality flat roofs are never totally flat but rather have a slight fall the minimum of a flat roof is 1 50.

But now flat roofs often are constructed with fewer layers because of improved waterproofing technology. It is more accurate to describe such a roof as semi flat. Although flat roofs are cheaper to build than pitched roofs they have a shorter life span. 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.

The basic construction of a flat roof starts with roofing timber that is laid across two upright items usually two walls. That will help you remember certain factors and details to build the best possible flat roof. This is usually a timber boarding of some type which in turn is supported on joists. Location page 5 factors such as the amount of sunshine temperature surrounding buildings or wind affect a flat roof and need to be considered.

Flat roofs are hard to replace. Cad pdf drawings testing bim. Airtightness page 7 very good levels of airtightness are required for all flat roof constructions. Valley detail clip valley detail one piece vented ridge detail.

The overhang of the roof at the wall is called the eaves.