Roof Valley Gutter Construction Details

Cover valley with a strip of underlay not less than 600mm wide underlapping general underlay.

Roof valley gutter construction details.

Purpose made valley trough tiles should be supported by gutter boards where the roof uses single lap interlocking tiles. Cut adjacent tiles and tile and a half tiles so that valley tiles course in and fit neatly. Closed valleys or open valleys. Roof valleys are like gutters with a steep pitch but the stakes are higher for valleys than they are for gutters.

Valleys shall have suitable weathering details including flashings to resist the passage of moisture to the inside of the building. There are two common methods for completing the flashing of a valley in a shingle roof system. Valley gutters detailing around the intersection of a valley gutter and a fascia board can be a little tricky. Roof ridges and ridge tiles roof hips and hip tiles roof valleys roof verges and lead flashings.

One of the details that varies between homes is the method of flashing the valley areas of the roof. To get the most out of it is helpful to also read parts 1 and 2. Flashing a humpy old roof valley requires a little give and take and a backup plan. Soakers and step flashings step and cover flashings and secret gutters 30 cover flashings 31 apron flashings 32 chimney flashings 33 pitched valleys 34 ridges and hips 35 mitred hip and valley soakers 36 parapet and tapered gutters 36 drips and rolls for gutters 37 chute outlets for gutters 37 pipe outlets for gutters 38 roll and drip joints 39.

Here are a few pointers. The width of the open valley is dependent upon the roof pitch and the volume of water expected to drain into the gutter. Design right by alide elkink freelance technical writer wellington cross sectional details for valley gutters are given in both acceptable solution e2 as1 and the nz metal roof and wall cladding code of practice. Valley with valley tiles ensure that continuous support is provided for ends of tiling battens on each side of valley.

First clean the debris out of the valley including sawdust nails and whatever else is in there. Part 3 of the four part guide to roof construction covers pitched roof detail. Roof problems valley gutters. Proprietary gutter or valley systems.

To understand what makes a valley either closed or open it is important to understand how a valley is constructed. We use lots of sketches and photos in our building surveys. Part 1 a guide to roof construction covers an overview of flat and pitched roofs. 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.

This valley has seen its better days but the. 1stassociated co uk surveyors can provide help and advice with regard to property reports building surveys structural surveys independent valuations structural reports engineers reports specific defects report home buyers reports or any other property matters. In this video we ll flash the valley.