Flat Roof Valley Gutter Detail

Gutters can also be installed to work in tandem with a scupper system.

Flat roof valley gutter detail.

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. Details and technical drawings of the flat roof drainage as downloads in the practical pdf dxf and dwg formats. 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. 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.

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. Where the roof pitch is between 8 12 5 the. Roll detail at drips and abutments 41 flat roof roll and drip intersections 42. Pitched roof intersection with valley 44 vertical cladding joints and fixings 45 vertical cladding head finishes 46 dormer windows jambs and s ill 46.

Alwitra flat roof details. Water like to follow the valley to the edge and flow back under the valley. Maximum catchment areas for valley gutters are given in table 8 of e2 as1 for minimum roof pitch and gutter widths. Valleys with central upstands are beneficial where two roof slopes of unequal pitches meet at a valley.

Catchment area must be no more than 25 m gutter must be at least 250 mm wide. Valley areas are prone to leak due to the lack of using proper materials. Gutters are often a viable option for flat roofs directing water on the outside of the structure to downspouts. When a valley is flat like this one in the image it is more problematic.