Repairing a gutter

Zinc gutters

If the gutter is very oxidized and leaks in several spots, the damaged part must be replaced.

Cut the element to be replaced with a hacksaw or better with a metal cutting disc on an angle grinder. Then file the edge with a metal file to deburr the cut piece.

Cut a piece of new gutter 4-5cm longer than the removed section and deburr it.

Clean the edges for 5cm on both the gutter and the replacement section with fine sandpaper until the oxide layer is removed, then degrease with trichloroethylene or nitro thinner.

Position the new section following the drainage slope, making sure it fits precisely; if necessary, use pliers to adjust.

Coat the soldering area with flux paste to improve the hold of the solder joint.

Secure the new section in place with clamps to maintain a tight fit and create a continuous solder joint along the entire profile.

Tack the edges with three points and then create a convex bead without protrusions.

Zinc gutter with a hole

In the case of a small hole, brush the area and sand it with sandpaper, then degrease with trichloroethylene or nitro thinner.

Coat with soldering paste and create a solder joint to close the hole. If the hole is very large, replace the compromised section.

PVC gutter with a hole

Clean the damaged area and the edges of the hole thoroughly within the surrounding 5cm. Degrease the area and once dry, brush on the appropriate mastic.

Cut a strip of fiberglass cloth large enough to cover the area to be sealed and apply it over the hole. Dab the cloth to make it adhere perfectly, then cover it with mastic using a spatula.

Replacing a PVC gutter section

If the damaged area is very extensive, cut the section with a hacksaw and once the area is cleaned, glue a new section in place with the appropriate adhesive, overlapping by 3-4cm.