Hello:

Have been looking into whether we want, or need, a ridge vent to be
installed when we get a new roofing job. Anyway, we noticed that the
insullation in the attic has, over the years, crept over the soffett
ventillation holes, thus making them probably useless.

It was suggested that we use those thin plastic channel pieces that go
between the roof rafters in the attic, and that then serves to channel the
air flow from the outside soffetts toward the ridge vent. These would also
stop the insullation from migrating backover the soffetts holes.

The mfg's web sites say to use the whole 4 feet up the underside of the
roof. As they are 4 feet in length, so, for our roof, would be perhaps 2/3
of the way up toward the peak.

They would also stop the insullation (once moved back) from re-migrating
over the soffett holes.

Started thinking about these channels that supposedly provide "better" attic
ventillation than just using a ridge roof vent without these channels. Two
of these channels are called Raft-R-Mate and also one by ADO Pro Vent.

I'm obviously missing something here.

Wouldn't the ventillation of the whole attic be better if these channels
Weren't used ?

I would think that you want drawn in air from the soffett (by the slight
negative pressure caused the hot air flow out the ridge vent) to mix with
the complete attic's air volume (and then out).

Not to just channel the drawn in air up and out, without any real attic air
mixing.

What am I missing here ?

Thanks,
Bob