Gutter Expansion Joint Distance

Presents practical troubleshooting and corrective tips for typical problems of roof panels gutters downspouts fascia copings flashing ridges and hips valleys expansion joints penetrations fasteners and soldering.

Gutter expansion joint distance.

Expansion allowances gutter specific expansion tables based on girth profile metal predicted annual δt expansion of building materials table with various expansion coefficients must be used for fascia and copings with consideration of both metal and substrate flat seam roof expansion guidance over 30 feet use batten seam design to allow for expansion. Sidewalk curb and gutter expansion joints sshall be installed at all radius points at both sides of each driveway at both sides of each alley entrance at every change of depth in the concrete and shall provide. Expansion joints may also be required at changes in gutter width or depth at corners and at end conditions. Maximum allowable length between expansion joints with one end fixed.

An invaluable inspection resource for owners of standing seam batten seam or bermuda type roofs. However the joint spacing depends on the metal and the gauge used. In general long straight runs should have joints spaced a maximum of 48 feet apart. For complete separation of adjoining structures.

For runs that require longer than 50ft an expansion joint can be used or two shorter runs of gutter with end caps can be butted together with a piece of aluminum folded over the joint. The depth shown in the calculations is at the upstream end. For 5 6 gutter. Therefore any slope on the gutter will make the downstream end deeper or the flashing longer.

The spacing of the expansion joints depends on the size of the gutter and thickness of the metal but a. Following smacna guidelines a 20 ounce copper built in gutter with a 12 inch bottom dimension should have a maximum distance to a fixed point such as a downspout ranging from 17 feet to 20 feet then there would be an expansion joint. Required gutter slope 1 40 to 1 200 there is always some confusion as to how the slope affects the overall depth. Where movement is restricted by an outlet or corner for example an expansion joint should also be sited within 1 metreof that restriction.

According to smacna the best way to protect your gutter system from thermal expansion is to split any run of 50 ft or more into two separate runs capping both ends and leaving gap between the top edges of the end caps fig 1.