Internal Copper Gutter Minimum Slope

Working out gutter slope as a general rule gutter slope is set at 1 4 inch per 10 feet of guttering.

Internal copper gutter minimum slope. Table 8 1b shows the minimum recommended slopes using these special details. Expansion joints in copper gutters must be provided to allow for the natural expansion and contraction of copper caused by thermal changes. Lower slopes are possible under certain conditions using modified details. Expansion joints may also be required at changes in gutter width or depth at corners and at end conditions.

E2 as1 8 1 6 1 requires all internal gutters to have a minimum 1 100 slope. Most contractors tend to set the slop at one quarter inch per ten feet of guttering. With the exception of membrane roofs water from internal gutters must discharge into a rainwater head or to an internal outlet as shown in e2 as1 figures 63 a and b and figures 64 b or c see figure 3. This means the downspout end of the gutter should be set 3 4 of an inch lower than the other end.

E2 as1 8 1 6 1 requires all internal gutters to have a minimum 1 100 slope. Table 8 1a shows the recommended minimum slopes for various copper roofing systems using the details shown throughout this handbook. The modified details are discussed below. This brings up another important rule to keep in mind.

All guttering must slope toward the nearest downspout. For example if you have 30 feet of guttering the calculation is 1 4 x 3 0 75 i e.