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It's Hot Upstairs More Insulation or Attic Fan? Tom in PA 07-05-2008
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Posted by Tom in PA on July 5, 2008, 3:20 pm
Hi!

We have a two-story home in Flagstaff, AZ. It's normally cool enough
around here that, without using our central air, the downstairs stays
pretty comfortable during the day if we open things up at night to
cool the house down. But the bedrooms upstairs get pretty toasty.
The attic gets very toasty, naturally. I'm thinking about either
adding insulation in the attic to keep that heat out of the bedrooms
or putting in an attic fan. The house is two years old.

Each bedroom has two walls and of course the ceiling that are adjacent
to the attic, so I can add insulation to both walls and ceiling.
Currently, the walls have fiberglass insulation between 2x6s and the
ceiling has roughly 6" of blown-in insulation. There are three gable
vents in the attic and a good number of 3-4" diameter vents on the
eaves.

So..... any suggestions? Will either the fan or additional insulation
make a significant difference in bedroom comfort? Any advice would be
appreciated!

Thanks!

Tom

Posted by dpb on July 5, 2008, 3:24 pm
Tom in PA wrote:
...
> So..... any suggestions? Will either the fan or additional insulation
> make a significant difference in bedroom comfort? Any advice would be
> appreciated!

Additional insulation may help, yes.

Attic fan could aid when is cooler in evenings to hasten the cooldown by
drawing in cooler air more quickly.

I'd look first, however, at whether there is adequate are movement
through the attic -- what's the area of soffet venting and are they free
and open (not blocked w/ insulation or otherwise)...

--

Posted by on July 6, 2008, 8:58 pm
> Tom in PA wrote:
>
> ...

Tom covered this very well.

First make sure you have enough vents for the area and that they
are clear and working.

I have never had much luck with fans, but they can help at times.
It sort of depends on the area where you live.


Posted by hallerb@aol.com on July 5, 2008, 3:27 pm
> Hi!
>
> We have a two-story home in Flagstaff, AZ. =EF=BF=BDIt's normally cool en=
ough
> around here that, without using our central air, the downstairs stays
> pretty comfortable during the day if we open things up at night to
> cool the house down. =EF=BF=BDBut the bedrooms upstairs get pretty toasty=
.
> The attic gets very toasty, naturally. =EF=BF=BDI'm thinking about either
> adding insulation in the attic to keep that heat out of the bedrooms
> or putting in an attic fan. =EF=BF=BDThe house is two years old.
>
> Each bedroom has two walls and of course the ceiling that are adjacent
> to the attic, so I can add insulation to both walls and ceiling.
> Currently, the walls have fiberglass insulation between 2x6s and the
> ceiling has roughly 6" of blown-in insulation. =EF=BF=BDThere are three g=
able
> vents in the attic and a good number of 3-4" diameter vents on the
> eaves.
>
> So..... any suggestions? =EF=BF=BDWill either the fan or additional insul=
ation
> make a significant difference in bedroom comfort? =EF=BF=BDAny advice wou=
ld be
> appreciated!
>
> Thanks!
>
> Tom

do both but make CERTAIN all the vents are open, often they get
covered with blown in insulation

Posted by Tony Hwang on July 5, 2008, 3:42 pm
Tom in PA wrote:
> Hi!
>
> We have a two-story home in Flagstaff, AZ. It's normally cool enough
> around here that, without using our central air, the downstairs stays
> pretty comfortable during the day if we open things up at night to
> cool the house down. But the bedrooms upstairs get pretty toasty.
> The attic gets very toasty, naturally. I'm thinking about either
> adding insulation in the attic to keep that heat out of the bedrooms
> or putting in an attic fan. The house is two years old.
>
> Each bedroom has two walls and of course the ceiling that are adjacent
> to the attic, so I can add insulation to both walls and ceiling.
> Currently, the walls have fiberglass insulation between 2x6s and the
> ceiling has roughly 6" of blown-in insulation. There are three gable
> vents in the attic and a good number of 3-4" diameter vents on the
> eaves.
>
> So..... any suggestions? Will either the fan or additional insulation
> make a significant difference in bedroom comfort? Any advice would be
> appreciated!
>
> Thanks!
>
> Tom
Hi,
Improve attic vent and if insulation is not enough increase it. I saw
attic fan lifting insulation from ceiling due to lack of vents.

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