Calculating Gutter Sizes Uk

If a roof s various drainage areas call for different size gutters go for the biggest one k style.

Calculating gutter sizes uk.

Determine the surface area of your roof. Add a fall to the gutters which we recommend you do anyway. Calculate the square footage by getting up there with a tape measure. Then use the chart below to see what size gutter you need.

As a consequence sizing the gutter spout is key to properly sizing a gutter system. For example if your roof is 40 feet long and 20 feet wide you area will be 800 square feet. 5 inch 5 520 square feet. L1 l2 selecting gutter size there is no standard rate of rainfall in the uk so for accurate calculations refer to an approved weather authority to get a site specific rainfall level.

Change the style of gutters to one with a greater capacity. 6 inch 7 960 square feet. Use the formula a l x w where a is area l is length and w is width. For a typical gutter run up to a maximum of 10m the ratio of gutter lengths is calculated from.

Move the outlet downpipe from the end of the gutter to the middle. Design area effective area 5 x 10 x 1 29 64 5m run off 64 5m x 0 022 l s per m 1 42 l s from chart 125 x 100 gutter with 76 ø downpipe appears suitable but check. The most logical way to choose your gutter size would be according to the area of your roof. Increasing the capacity of your gutter system.

Gutter ratio l1 l1 l2 where.