Calculating Gutter Sizes Uk

Move the outlet downpipe from the end of the gutter to the middle.

Calculating gutter sizes uk. If a roof s various drainage areas call for different size gutters go for the biggest one k style. The most logical way to choose your gutter size would be according to the area of your roof. If you ve got a simple gable end roof then it s easy you only need to know two figures one for either slope. Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted square footage.

Calculate the square footage by getting up there with a tape measure. Use the formula a l x w where a is area l is length and w is width. Gutter ratio l1 l1 l2 where. For a typical gutter run up to a maximum of 10m the ratio of gutter lengths is calculated from.

5 inch 5 520 square feet. 6 inch 7 960 square feet. Determine the surface area of your roof. For example if your roof is 40 feet long and 20 feet wide you area will be 800 square feet.

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. Add a fall to the gutters which we recommend you do anyway. Change the style of gutters to one with a greater capacity. Increasing the capacity of your gutter system.

As a consequence sizing the gutter spout is key to properly sizing a gutter system.