Calculating Gutter Sizes Uk

Determine the surface area of your roof.

Calculating gutter sizes uk.

Move the outlet downpipe from the end of the gutter to the middle. Lg 10 133 therefore reduction factor 0 86 d 0 1 gutter capacity x reduction factor 2 84 x 0 86 2 44 l s therefore the proposed system is suitable. The most logical way to choose your gutter size would be according to the area of your roof. Gutter ratio l1 l1 l2 where.

As a consequence sizing the gutter spout is key to properly sizing a gutter system. Calculate the square footage by getting up there with a tape measure. For a typical gutter run up to a maximum of 10m the ratio of gutter lengths is calculated from. Increasing the capacity of your gutter system.

Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted square footage. 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. 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.

For example if your roof is 40 feet long and 20 feet wide you area will be 800 square feet. Add a fall to the gutters which we recommend you do anyway. Change the style of gutters to one with a greater capacity. Use the formula a l x w where a is area l is length and w is width.

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