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.

Flat roof valley gutter detail.

Catchment area must be no more than 25 m gutter must be at least 250 mm wide. Where the roof pitch is between 8 12 5 the. Maximum catchment areas for valley gutters are given in table 8 of e2 as1 for minimum roof pitch and gutter widths. Details and technical drawings of the flat roof drainage as downloads in the practical pdf dxf and dwg formats.

Gutters can also be installed to work in tandem with a scupper system. 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. Water like to follow the valley to the edge and flow back under the valley.

Most roofers that do shingles will use a heavy base paper instead of a rubber membrane. 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. Roll detail at drips and abutments 41 flat roof roll and drip intersections 42. Valley areas are prone to leak due to the lack of using proper materials.

Pitched roof intersection with valley 44 vertical cladding joints and fixings 45 vertical cladding head finishes 46 dormer windows jambs and s ill 46. When a valley is flat like this one in the image it is more problematic. These valleys have large upstands each side of the upstand to direct water towards the gutter without discharging over its edges. Alwitra flat roof details.