Internal Copper Gutter Minimum Slope

The modified details are discussed below.

Internal copper gutter minimum slope.

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. This means the downspout end of the gutter should be set 3 4 of an inch lower than the other end. Expansion joints may also be required at changes in gutter width or depth at corners and at end conditions.

Most contractors tend to set the slop at one quarter inch per ten feet of guttering. E2 as1 8 1 6 1 requires all internal gutters to have a minimum 1 100 slope. Expansion joints in copper gutters must be provided to allow for the natural expansion and contraction of copper caused by thermal changes. All guttering must slope toward the nearest downspout.

Lower slopes are possible under certain conditions using modified details. So if you have a 25 foot section of guttering you should set the downspout end of the gutter 5 8 of an inch lower 1 4 x 2 5 5 8 than the other end. 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. 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.

For example if you have 30 feet of guttering the calculation is 1 4 x 3 0 75 i e. This brings up another important rule to keep in mind.