Calculating Gutter Sizes Uk

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

Calculating gutter sizes uk.

Gutter ratio l1 l1 l2 where. Move the outlet downpipe from the end of the gutter to the middle. The most logical way to choose your gutter size would be according to the area of your roof. For a typical gutter run up to a maximum of 10m the ratio of gutter lengths is calculated from.

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. 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. Determine the surface area of your roof.

Increasing the capacity of your gutter system. 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. If a roof s various drainage areas call for different size gutters go for the biggest one k style.

6 inch 7 960 square feet. If you ve got a simple gable end roof then it s easy you only need to know two figures one for either slope. 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.