Flat Roof Valley Gutter Detail

Alwitra flat roof details.

Flat roof valley gutter detail.

Roof valleys are like gutters with a steep pitch but the stakes are higher for valleys than they are for gutters in a previous video we covered how to flash roof edges before shingling. Valleys with central upstands are beneficial where two roof slopes of unequal pitches meet at a valley. Maximum catchment areas for valley gutters are given in table 8 of e2 as1 for minimum roof pitch and gutter widths. When a valley is flat like this one in the image it is more problematic.

Catchment area must be no more than 25 m gutter must be at least 250 mm wide. Gutters are often a viable option for flat roofs directing water on the outside of the structure to downspouts. Gutters can also be installed to work in tandem with a scupper system. In reality a flat roof isn t fully level and flat roofs built for gutters should direct water to one or more sides where the gutters are installed.

Details and technical drawings of the flat roof drainage as downloads in the practical pdf dxf and dwg formats. 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. Roll detail at drips and abutments 41 flat roof roll and drip intersections 42. A lock hem drip edge on a sheet metal brake ben bogie walks us through the process of bending a really short piece of roof flashing which he will use on.

Pitched roof intersection with valley 44 vertical cladding joints and fixings 45 vertical cladding head finishes 46 dormer windows jambs and s ill 46. These valleys have large upstands each side of the upstand to direct water towards the gutter without discharging over its edges. Most roofers that do shingles will use a heavy base paper instead of a rubber membrane. Cost alternative to the restructuring of existing gutter detail.