Cut underlay to rake and dress over tilting fillets to lap onto metal valley.
Pitched roof valley gutter detail.
Part 3 of the four part guide to roof construction covers pitched roof detail.
Roof ridges and ridge tiles roof hips and hip tiles roof valleys roof verges and lead flashings.
Roof problems valley gutters.
Where the roof pitch is between 8 12 5 the.
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.
Ensure that underlay is not laid under metal.
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.
Part 1 a guide to roof construction covers an overview of flat and pitched roofs.
It is an area where water is directed towards rather than away from therefore correct detailing and construction is essential.
Ensure that valley boards plywood sheathing and tilting fillets provide full support for metal valley.
One of the areas of a pitched roof most prone to leakage if not constructed properly is the valley.
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.
How to do a roof valley martin s roofing and guttering merton ltd for all your roofing needs.
Our basic fitting guides are designed to assist installing rolled lead sheet in a range of roofing applications including flashings valleys gutters and flat roofing.
To get the most out of it is helpful to also read parts 1 and 2.
A common misconception is that the mortar bedding is there to prevent water access.