blowing in wall insulation from attic
Trevor_Lambert
| Posted in General Questions on
Is there a reason I can’t fill the wall cavities of a double stud wall with cellulose from above, in the attic, then just fill the attic with insulation? That way if there is any settling in the walls, it just gets filled in by the insulation above. Seems like it would be easier overall, as well. I’m picturing the top plates of the inner and outer stud walls would be joined with perpedicular 2x4s at each stud, then have a another top plate above that which the roof trusses would rest on.
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Replies
TPLB,
Robert Riversong used to insulate his walls that way.
A few comments:
- The stud walls will already have top-plates and don't need to be joined together that regularly. I would frame them conventionally and avoid the complications the extra layers cause.
- Check your code. It may require the walls to be separated from the roof space above by fire-blocking, and every so often horizontally as well.
- If settling occurs in dense-pack cellulose it generally isn't uniform. I'm not sure the insulation installed in the attic can be relied on to fall into the top of the wall and fill voids.