Aluminium Valley Gutters are normally fitted between two roof pitches but can also be manufactured as a gutter liner. Our metal valley gutters will be manufactured to suit each project as we can produce an infinite amount of valley gutter sizes specifically to your individual project requirements. Special profile valley gutters can be fabricated or pressed.
Valley Gutter Design
Having the correct valley gutter flow capacity is more critical than with an eaves gutter so calculating the flow rates accurately is essential. These flow rates can be calculated by our designers so please contact our Technical Department if you need assistance. An additional freeboard (of up to 75mm) over the maximum water level is recommended to allow for splashing and waves.
Consideration needs to be taken when deciding on the gutter gauge and support to whether the valley gutter is going to take foot traffic. It is good practice to have some gutter overflows as the consequences of overflow or leakage are serious, so their correct design and installation is very important.
If valley gutters are part of the roof, they may also need to be insulated to comply with thermal requirements with respect to excess heat loss, thermal bridging and the risk of condensation.
Please Note: Due to our ongoing product development policy, we reserve the right to alter specifications without prior notice.