Flat Roof Detail Section With Hvac

What typical detailing methods are used to seal flat roof penetrations.

Flat roof detail section with hvac.

A roof is considered to be flat when it is of a slope of 1 5o to the horizontal. The base flashing extends onto the roof a minimum of 4 and is soldered to the ventilator. Although flat roofs are cheaper to build than pitched roofs they have a shorter life span. 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.

Otherwise the system may not work the way it should. Isometric section through sun terrace hospital in waiblingen d 1928 richard dăścker roof edge detail according to the frankfurt standard for small dwellings 1927 proposal for roof edge. If for instance you wanted to add 1 4 inch per foot to a dead flat roof you would get foam that ranges from 1 2 inch thick to 1 1 2 inches thick over 4 feet. A flat roof usually consists of the following.

Flat roofs aren t architecturally logical as rain and snow will shed much more quickly off a sloped roof. Of course you don t need to live in a modern house to deal with a flat roof. Hold your cursor over the file name to view when a drawing was last updated. Factors that affect a flat roof construction.

Airtightness page 7 very good levels of airtightness are required for all flat roof constructions. Dimensions weight component details cross braces supply return opening layout dimensions and notes which are unique to each unit. Of course there is an installation spec manual from ib roofs which we always keep handy and actually had to use once or twice. The lower edge is hemmed for stiffness.

Installing a flat roof pvc single ply roofing membrane in this case can be a pretty straight forward process or a very confusing endeavor because each component must be installed in a particular order. The detail drawings are grouped by detail type and can be downloaded below in dwg or pdf format. Banding is typically used to seal soil vent pipes on single ply roofs such as fdt rhepanol pib and involves wrapping an unreinforced membrane around the pipe to a minimum height of 150mm. Large flashings are formed with a hook edge on the top and sides and cleated to the sheathing at 12 o c.

Typical methods include banding pitch pockets and cover flashings. Location page 5 factors such as the amount of sunshine temperature surrounding buildings or wind affect a flat roof and need to be considered. You d start at the bottom edge with a 1 2 inch to 1 1 2 inch piece and then at the up slope side place a sheet of 1 inch flat foam and layer another piece of the tapered foam on top of it. York does not provide roof system materials required in the fl ashing of a structural member through a roof deck.

This detail illustrates a method of flashing a ventilator on a sloped roof. A blower door test is strongly recommended.