Hello,
I just put up a new rain gutter and the water is missing the gutter. Is the gutter to be installed up under the drip edge on the roof? I positioned them under the edge of the roof and some of the slower running water just follows the roof to the drip edge and down the fascia board. What happened?
Mike
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Mike,
The shingles are supposed to overhang the edge of the facia or gutter board at least one if not one and one-half inch. But on low-slope roofs, this is not always a guarantee that dripping water will not roll back and up the shingles. This is caused by capillary attraction.
It sounds as if you will have to install a metal flashing that slides up under the shingles about four inches. The metal is bent to lap over the back of the gutter. This metal drops inside the gutter and then kicks away from the back of the gutter at a 45 degree angle. This little kick is only 1/4 inch long. If you don't create this kick angle, the water can actually be pulled up between the flashing and the back of the gutter and leak once more onto the facia board.
Tim Carter
www.askthebuilder.com
W3ATB