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Ask a pro: Leaky eavestrough

5-Eavestrough

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My eavestrough leaks, between the aluminum fascia and the eavestrough itself. I installed it according to the instructions for slope and fastening. What did I do wrong and what can I do to fix it? -Ross Johnson, Saskatoon

My guess is that you have one of two problems. Water could be leaking over the back of the eavestrough–the part that sits against the fascia–because the eavestrough is overflowing. The solution: make sure the downspouts are clear and sized properly.

More likely, however, your water flows off the roof shingles and then down between the eavestrough and the fascia. Make sure that the eavestrough is mounted high enough on the fascia so that it sits just below where the shingles will dump off the water. The shingles should be overhanging the roof deck by at least 1″. An easy fix for this problem, if you don’t already have it, is to install a drip edge along the eaves, tucked under the shingles. The drip edge ensures a continuous path for the water and it helps to support the shingles, so that they don’t break or droop at their edges.

Michel has contributed to Canadian Home Workshop since 2003. Even though he works as a contractor and furniture builder, he really enjoys motivating others to do things for themselves. He really believes that with a little investment in tools and time, most people can learn to craft and fix things, rather than buy or discard them.

In home improvement terms, he generally works on projects involving cabinetry, tile and trimwork.

Michel is also a great fan of the Arts and Crafts aesthetic, and he likes building furniture pieces that reflect that style, though since moving to the West Coast, he’s become more interested in contemporary design.


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DrBob

Dec. 3, 2011

5:03 pm

My eavestrough is fastened with aluminum spikes through the trough into the fascia, creating a perforation well below the back of the trough. The spikes loosen with ice and snow load and allow water to flow through the holes before it overflows the back of the trough. There are screw fasteners available and I will soon use them to replace the spikes. Worse yet, the front of the house has a Mansard roof (no overhang) and water flowing along the spike is likely getting into the wall framing. Another thing to look at .



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