How do I fix leaking gutters?

The shingle damage in this picture is caused by a leaking gutter from above. Left unrepaired, the leak has the potential to cause serious damage. (Photo: Hugh Cairns)

Roof drainage is one of the fundamental considerations of building design. A good guttering and drainage system is essential to the longevity of a roof, and to the preservation and care of a property. A roof not only provides a covering over the dwelling, but it also keeps out the elements and preserves what is underneath it. It is easy to see why a good drainage system, its maintenance and upkeep, is essential.

Gutters and downspouts perform two major functions. They protect the walls of a building from water which would ordinarily run off the roof. This water can damage the wall surfaces and cause localized erosion at ground level. The most important function of gutters and downspouts, however, is their contribution towards ensuring a dry home below grade. Gutters should collect all water run-offs, and downspouts should discharge the water into proper drains or onto the ground a good distance away from the foundation walls.

Blocked by debris, runoff water can overflow gutters, and seams that require caulking can leak. Ensuring that gutters are performing properly is vital to the health of your home because they can cause and water intrusion damage. A leaking gutter should be repaired as quickly as possible. Leaking gutters can often be caulked to restore them to working condition.

The trickiest part of caulking a gutter seam is to make sure the area is clean and dry. If it’s not, the caulking may not set properly and the leak may not be fixed. Anytime that we have a string of sunny days is a good time to fix gutter leaks. You should leave yourself plenty of time to clean your gutters and let them dry. Roughen up the seams with a wire brush or some sandpaper. This will help the caulking adhere better to the surface to be repaired.

Apply plenty of caulking at the seam. Make sure that you cover the entire seam and not just a portion of it. Remember that it can take up to 48 hours to dry depending on what type of caulking you're using. Make sure you use the proper sealant. The joints and seams in gutters expand and contract with changing temperatures.

This article is written by or on behalf of an outsourced columnist and does not necessarily reflect the views of Castanet.