Our first instinct, but it doesn't appear to be the case -- there is no sign of drippage in the attic itself, only *below* the attic.
Well, yes. The snow melts high on the roof, and flows down (under the snow blanket) to the gutter, and encounters a dam there, and backs up under the flashing and shingles - and from there it finds the path of least resistance. If you stop the snow from melting high up, it cannot flow down to the gutter.
Which is not to say that your problem isn't with the gutter, but that a normal ice dam does not necessarily leak into the attic proper, so that isn't in and of itself telling.
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Date: 2007-12-21 06:45 pm (UTC)Well, yes. The snow melts high on the roof, and flows down (under the snow blanket) to the gutter, and encounters a dam there, and backs up under the flashing and shingles - and from there it finds the path of least resistance. If you stop the snow from melting high up, it cannot flow down to the gutter.
Which is not to say that your problem isn't with the gutter, but that a normal ice dam does not necessarily leak into the attic proper, so that isn't in and of itself telling.