Roof Construction Details Low Slope Roof On Posts

We often hear low slope roofs referred to as flat roofs but no roof should be dead level.

Roof construction details low slope roof on posts. Sunday august 5 2018 the traditional metal roof types such as 5v crimp shown above and corrugated are rated by the manufacturers for use down to a 3 12 pitch three inches of vertical rise for every foot of horizontal run. Problems at these points typically arise from improper application methods and the use of inappropriate or incompatible materials. The closer a roof is to level the more likely sagging rafters will make a pond. By low slope roofing we mean any roof that is pitched at less than 4 inches of rise in 12 inches of run or 4 12 pitch.

An adequately pitched roof with a sagging middle will still slope enough to drain. Residential low slope roofing can generally be divided up into two broad categories. The most critical application points on low slope roof systems are at flashings penetrations and accessories. For a low slope residential roof there are two main options.

That includes soldered metal roofing or synthetic membranes. Ceilings product comparison tool. 1 cover the entire surface with a self adhesive flashing membrane such as grace ice water shield there are many equivalent products. Designers and specifiers should pay close attention to roofing details in these areas and.

Insulation itools quick and easy online tools and calculators that can help you determine your insulation needs as well as how much you could save. These critical junctures account for the majority of roof leaks. Then apply standard asphalt shingles over the membrane. 1 3 5 design pressure coefficients for roof zones.

For buildings with low slope roofs less than 2 12 slope the wind speed at eave height is used. A comprehensive roofing specification writing tool allowing users to quickly write accurate steep and low slope roofing specifications for job submittal packages. Regular asphalt shingles and standard skylights will work at pitches of 4 12 or greater but at lower pitches you have to use different materials. 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.

Can metal roofing be used on a low slope pitch roof. Roof design wind pressures are determined using the wind speeds at the mean roof height of the building i e average of the eave and ridge heights.