Calculating Gutter Sizes Uk

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

Calculating gutter sizes uk.

5 inch 5 520 square feet. Add a fall to the gutters which we recommend you do anyway. 6 inch 7 960 square feet. Increasing the capacity of your gutter system.

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. If a roof s various drainage areas call for different size gutters go for the biggest one k style. Calculate the square footage by getting up there with a tape measure. As a consequence sizing the gutter spout is key to properly sizing a gutter system.

The most logical way to choose your gutter size would be according to the area of your roof. Determine the surface area of your roof. Then use the chart below to see what size gutter you need. Move the outlet downpipe from the end of the gutter to the middle.

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. 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. For example if your roof is 40 feet long and 20 feet wide you area will be 800 square feet. Use the formula a l x w where a is area l is length and w is width.

Gutter ratio l1 l1 l2 where.