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Posted by Walter R. on July 31, 2005, 5:07 pm
My 3000 sqft, single story, house has screened soffit openings (8"x16") into
the attic, every 15 feet.
However, there is no vent in the roof, at all. The roof is cement tile over
plywood and tarpaper.
I suppose, the design relies on cross ventilation between soffits.
Is this acceptable or should I install additional vents in the roof? (not
easy!)
--
Walter
www.rationality.net
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Posted by SQLit on July 31, 2005, 11:36 am
> My 3000 sqft, single story, house has screened soffit openings (8"x16")
into
> the attic, every 15 feet.
>
> However, there is no vent in the roof, at all. The roof is cement tile
over
> plywood and tarpaper.
>
> I suppose, the design relies on cross ventilation between soffits.
>
> Is this acceptable or should I install additional vents in the roof? (not
> easy!)
>
> --
> Walter
> www.rationality.net
I will bet there are gable vents on the ends. Up near the roof.
Personally I would not try putting new holes in a tile roof.
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Posted by Todd H. on July 31, 2005, 12:34 pm
> My 3000 sqft, single story, house has screened soffit openings (8"x16") into
> the attic, every 15 feet.
>
> However, there is no vent in the roof, at all. The roof is cement tile over
> plywood and tarpaper.
>
> I suppose, the design relies on cross ventilation between soffits.
>
> Is this acceptable or should I install additional vents in the roof? (not
> easy!)
I don't do this for a living, but my homeowner discussion with roofing
and inspector types indicates that you really would want to add a
gable vent to this mix, and/or some active device (powered ventilator)
to improve the airflow situation there. Though, all these
discussions have been in the context of asphalt shingle roofs.
Another important thing to verify is that your bath exhaust fans
really do vent out to the roof vs into the attic, for the obvious
moisture reasons.
Best Regards,
--
Todd H.
http://www.toddh.net/
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Posted by on July 31, 2005, 1:45 pm
Pop makes a point. Get into the attic and check, if you haven't
already.
I suggest you look at the Building Science Corporation web site.
It has some useful research on venting.
TB
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Posted by Pop on July 31, 2005, 1:53 pm
> My 3000 sqft, single story, house has screened soffit
> openings (8"x16") into the attic, every 15 feet.
>
> However, there is no vent in the roof, at all. The
> roof is cement tile over plywood and tarpaper.
>
> I suppose, the design relies on cross ventilation
> between soffits.
>
> Is this acceptable or should I install additional
> vents in the roof? (not easy!)
>
> --
> Walter
> www.rationality.net
> -
>
Are you sure you don't have a ridge vent? Sometimes
they aren't continuous, and sometimes are hard to
identify unless you look closely.
If no ridge vent, yeah, you need to do some research
and add some venting; there are several alternatives.
HTH,
Pop
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