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.
Roof valley gutter detail.
Fold the top over the roof ridge and cut the bottom along the drip edge metal.
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Cover valley with a strip of underlay not less than 600mm wide underlapping general underlay.
Note that it is not.
However a valley gutter with a minimum clearance of 100 mm allows the gutter to be accessed more easily for cleaning see figure 3.
With a clean valley you can lay down some peel and stick roofing membrane.
These valleys have large upstands each side of the upstand to direct water towards the gutter without discharging over its edges.
Valleys with central upstands are beneficial where two roof slopes of unequal pitches meet at a valley.
Where a valley gutter is less than 250 mm wide for profiled metal and masonry tile roofing e2 as1 allows the roof overhangs to be reduced to 60 mm to give a 40 mm clearance between overhangs.
Cut adjacent tiles and tile and a half tiles so that valley tiles course in and fit neatly.
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.
The roof was very very old and we had two leaks that damaged our inside walls.
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.