Is a continuous baffle length needed?
We will have a conditioned attic that is 12’ wide by 72’ long spanning the length of the house. We realize that we need at least 2 baffles: one baffle at the soffit and one at the attic ceiling deck (where the ceiling meet the roof) Both shown in red circles
The question is, should we run the baffles continuously from the soffit to past the attic ceiling deck to guarantee the air goes out the roof vent? Shown with blue circle
Details:
We will have blown in cellulose. Zone 6a on a windy hill with the highest wind so far at 70 mph.
We want to use AccuVent baffles for durability, but don’t want to add to the cost if it isn’t necessary.
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Replies
As far as I understand it, the only reason for baffles is to make sure the air doesn't get cut off by insulation. If air can move, then there's no need.
Hopefully others with more experience will chime in.
The baffles only need to go a little beyond the highest level of insulation.
thanks!
Hill_builder,
Consider framing down the roof where the walls and ceiling of the attic meet to allow more depth for insulation there.
yes, we will be doing that so we can get the baffle and thicker insulation in that point.
We just trying to figure out if we need to extend the baffles the whole way to the soffit or just put at the soffit where the blown in cellulose will be.
Hill_Builder,
As Michael said, you just need to run them a few inches above the level of the cellulose to stop air scouring the surface.
thank you!