Graphical Construction Glossary >> Roofs and roofing. >> Roof Features >> box gutter

box gutter
A horizontal gutter at the intersection of two parallel roof surfaces.

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We are talking about the gutter that lies behind the rainwater header on the right hand side. That is the one that lies in the valley between the two gable roofs.

B-gutters although they look flat should have a fall to the outlet with a minimum of 1:200 and a maximum of 1:400.

They should be well supported on gutter boards or be of a sufficiently stiff material to span the framing members to allow foot traffic.

It is critical that the the gutter and outlets are designed with a sufficient capacity.

Unlike valley gutters between sloping roofs they have little fall and so they should be made a lot larger to be able to cope with the amount of water expected.

box gutter
A gutter between two parallel roof surfaces.

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Please Note! The information on this site is offered as a guide only!  When we are talking about areas where building regulations or safety regulations could exist,the information here could be wrong for your area.  It could be out of date!  Regulations breed faster than rabbits!
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