Pitched Roof Valley Detail

To get the most out of it is helpful to also read parts 1 and 2.

Pitched roof valley detail.

A roof valley is formed where two roof slopes meet. Essentially there are three main ways to shingle a roof valley. Maximum catchment areas for valley gutters are given in table 8 of e2 as1 for minimum roof pitch and gutter widths. Catchment area must be no more than 25 m gutter must be at least 250 mm wide.

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. One of the areas of a pitched roof most prone to leakage if not constructed properly is the valley. Cut underlay to rake and dress over tilting fillets to lap onto metal valley. Pitched roof is a type of roof which is provided with some slope as structure covering.

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. Your choice of valley installation method is critical because when improperly installed valleys are risks for serious leaks. Pitched roofs are generally used where rainfall is heavy. To transition the eaves the horizontal fascia extends to the last rafter tail and a vertical return finishes the transition.

Ensure that underlay is not laid under metal. Valley with metal lining. At the low end of the valley the subfascias of the two roofs are mitered with a block filling in the roof framing. Water collects in a valley to flow off the roof.

Ensure that valley boards plywood sheathing and tilting fillets provide full support for metal valley. Where the roof pitch is between 8 12 5 the. Pitched roof detail part 3 july 11 2014 by jon davies 10 comments part 3 of the four part guide to roof construction covers pitched roof detail. We know that the roofs are generally provided at top to cover and protect the structure from different weather conditions.

Cut tile and a half tiles neatly and fix to form a gap minimum 125mm wide centred on valley. Roof ridges and ridge tiles roof hips and hip tiles roof valleys roof verges and lead flashings. A common misconception is that the mortar bedding is there to prevent water access. Sheathing blocking is added along the valley and the sheathing pieced in for both roof planes.