Note that it is not.
Valley board roof.
This is a lead valley.
Cover valley with a strip of underlay not less than 600mm wide underlapping general underlay.
To join to new roof at a valley using layboards no valley beam no other structure under valley.
Existing room in roof ex tiled pitchedroof specified by struct eng.
Valleys are typically found where gable dormer roofs meet the main roof or when a house has angled wings or additions where two roof sections in different planes meet.
On the left of the valley the board is cut between the rafters as they were existing and too shallo to notch out.
Preformed grp valleys in many ways the roof construction for a pre formed grp valley is the same as that for a lead lined valley.
The piece in the centre is the lay board that the right hand rafters are sitting on.
The valley area of a roof the straight lines formed when two different planes of the roof meet is a critical area that handles a tremendous amount of water run off.
On the right the rafters are notched to take the valey board.
I still needed to cut back the old battens so that i could lay boards up the other side of the valley too.
Some grp valleys are sufficiently robust to enable them to be laid directly over the rafters rather than being supported on valley boards.
Not around this week cant find any pictures diagrams in books or internet havent a clue really what this looks detailed.
Cutting the boards at an angle to fit between the rafters was a bit of a pain.
Grp valley troughs provide you with a durable and cost effective alternative to lead products.
Soup to nuts riley shows the proper way of installing a valley on a roof.
Also will it matter that the 2 sides of valley are 25 mm diff heights.
Valley support boards laid up one side of the first valley.
Valley with valley tiles ensure that continuous support is provided for ends of tiling battens on each side of valley.
It is therefore worth asking the valley manufacturer for guidance on this.
Cut adjacent tiles and tile and a half tiles so that valley tiles course in and fit neatly.
Looking for something specific.
Section c cross section through alternative valley gutter detail to e2 as1.
Other roof is standard so do i need to recess valley boards or can i use 6mm on top of rafters.
The grp valley manufacturers have good installation details with their product.
New extension i am fitting valley boards one side of valley roof is warm ie with counter battens so valley board can be fitted on top of rafters and tile battens sail over o k.
