Calculate Gutter Size Uk

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

Calculate gutter size uk.

Refer to bsen 12056 part 3. 5 inch 2 500 square feet. 6 inch 7 960 square feet. Then use the chart below to see what size gutter you need.

That part of the gutter in which the angle obstructs the flow. 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. 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.

Depending on building type a safety factor should be allowed for the sizing of internal gutters. Then use the information below to see what size gutter you need. For example a 5 inch gutter system requires at least 2 x 3 downspouts and a 6 inch gutter system requires 3 x 4 downspouts. Picking your gutter size.

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. Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted square footage. Calculate the area of a roof to work out how much guttering is required. So for a roof that is 5 m long with a height of 4 m and the roof width is 8 m which makes the half roof width 4m we can calculate the effective roof area like this.

Gather some basic weather information to calculate the proper size for gutters and downspouts for a house. If a roof s various drainage areas call for different size gutters go for the biggest one k style. These figures are based on a rainfall intensity of 75mm hr roof pitch not exceeding 50º gutters running full. 5 inch 5 520 square feet.

An inch of rain is not much but it if falls in half an hour it could flood a gutter. Roof drainage layout and calculations. 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. Match your downspouts to the gutter size you chose in step 7.

Total roof area also affects runoff. 6 inch 7 960 square feet. Determine the size of your downspout. The total rainfall and how rapidly it falls will affect the runoff from the roof.

5 inch 5 520 square feet. Refer to the gutter packaging or specification for the recommended downspout size. 5 inch 5 520 square feet. For accurate project specific advice on rainwater flow calculations contact our friendly knowledgeable team on 0800 644 44 26.

Calculate effective maximum roof area b c 2 x length of roof area in m installation.