Pitched Roof Valley Gutter Detail

A common misconception is that the mortar bedding is there to prevent water access.

Pitched roof valley gutter detail.

Purpose made valley trough tiles should be supported by gutter boards where the roof uses single lap interlocking tiles they should be mechanically cut to the correct rake adjacent coverings should be neatly cut to form a smooth junction and preferably be cut from tile and a half tiles. With a clean valley you can lay down some peel and stick roofing membrane. The lowest course of tiles slates should not touch the roof membrane. It is an area where water is directed towards rather than away from therefore correct detailing and construction is essential.

Where the roof pitch is between 8 12 5 the. Fold the top over the roof ridge and cut the bottom along the drip edge metal. Part 1 a guide to roof construction covers an overview of flat and pitched roofs. One of the areas of a pitched roof most prone to leakage if not constructed properly is the valley.

Roof ridges and ridge tiles roof hips and hip tiles roof valleys roof verges and lead flashings. Valley gutters are generally considered to be a problem area. The valley gutter problem areas can be made worse where there are surrounding trees and associated leaves and branches that can block the valley gutters up. Ensure that valley boards plywood sheathing and tilting fillets provide full support for metal 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. To get the most out of it is helpful to also read parts 1 and 2. Catchment area must be no more than 25 m gutter must be at least 250 mm wide.

A valley gutter is where two main roofs meet or where there is a change in roof direction. Cut underlay to rake and dress over tilting fillets to lap onto metal valley. How to do a roof valley martin s roofing and guttering merton ltd for all your roofing needs. Ensure that underlay is not laid under metal.

Maximum catchment areas for valley gutters are given in table 8 of e2 as1 for minimum roof pitch and gutter widths.