Standard Gutter Size Nz

It s important to note that your calculations should always be based on the size of the largest section of roof.

Standard gutter size nz. Now architects engineers designers and contractors can easily and accurately size downspouts and gutters according to the specifications in smacna s architectural sheet metal manual 7th edition 2012. If a roof s various drainage areas call for different size gutters go for the biggest one k style. The largest plan area is area a at 38 m. The type of gutters you buy and the size of the gutter pieces you buy should be able to handle all the rain your home gets in a year.

This ensures the gutter will have sufficient capacity for all other smaller roof sections on the building. Gutters will be the same size for all the roof so use the largest plan area to work out the appropriate size gutter. They can be 4 5 or 6 inches. 6 inch 7 960 square feet.

New zealand building code clause e1 table 5. Gutters come in different sizes. 5 inch 5 520 square feet. Made form galvsteel zincalume colorsteel.

Then use the chart below to see what size gutter you need. Nz s leading provider of steel roofing guttering products for residential commercial customers. According to this old house while 5 inch k style gutters and 6 inch half rounds are usually suitable for homes houses with big steep roofs or those located. A standard 5 inch k style gutter can handle annual rainfall for a majority of houses in most of the u s.

You can also add additional or oversized downspouts to improve drainage if necessary. Gutter sizing guide gutter downspout sizing methodology. Gutter sizing step 1 determine roof area to be drained. Gutters come in different sizes.

Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted square footage. Downspouts also come in different sizes such as 2 3 inches and 3 4 inches in size. New zealand building code clause e1 figure 15. Work out the minimum gutter capacity or cross sectional area required and use this to select the right gutter.