Shed roof ventilation: no soffit?
Howdy all,
Please forgive me if this is covered somewhere…I did a search but didn’t see it exactly.
My house has an addition that is about 12×12 with a shed roof that mates into the gable roof of the old part. The only attic ventilation of this part comes from two pot vents near the top of this shed roof. This room stays hot in the summer, and I think it’s partly because of inadequate attic ventilation. There is no soffit to install soffit vents. It’s a flat ceiling, not a cathedral.
I would like to know if it would be acceptable/useful to install small vents like these
http://www.seiho.com/product/sfx/sfx.html
onto the sidewall of this attic space, near the floor of the attic, the idea being to get some intake ventilation to allow air to flow up to the pot vents. I have seen another site that suggested placing pot vents near the bottom of this roof section for intake, but I’d rather not as we’ve had some leakage issues with this section and the less holes in it, the better.
Thanks for any opinions; I can provide more detail if it doesn’t make sense.
John Mark
Edited 7/19/2007 8:32 pm ET by lojoma
Replies
Greetings lojoma,
As a first time poster Welcome to Breaktime.
This post, in response to your question, will bump the thread through the 'recent discussion' listing again which will increase it's viewing.
Perhaps it will catch someone's attention that can help you with advice.
Cheers
"In any weather, at any hour of the day or night, I have been anxious to improve the nick of time, and notch it on my stick too; to stand on the meeting of two eternities, the past and future, which is precisely the present moment; to toe that line."
-Thoreau
Well John, let's run this thru once again.
bump
Answer is maybe.
A house like that has some complicated ventilation issues that can be hard to prescribe for without seeing it and crawling around and getting dirty.
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Well, a maybe is better than a no, I guess.Any other thoughts on this? I know it is complicated but I would appreciate any specifics on what to look for or consider that makes this complicated. I can provide photos or more details...
We used to install thermostatically controlled roof vents on some of the new roofs we did.
Fairly easy install, same as a can vent. But needed a 12-2 wire ran for it.
Matt
I like the look of the vents you showed via the link. I'd put one in each side wall, as far from the pot vents as possible. If that's not enough to cool things down you could add a couple more, near the opposite corner. I like turbine vents over high hat pot vents. They can move a lot of air and are surpisingly dry inside, even during very heavy rain storms. Just make sure that you adjust them very close to level.
Thanks for the advice. More info if helpful:
One side wall is exposed to outside; other side "wall" actually ties into gable roof of old part of house. Shed roof attic is open to this old part so they do actually "share" some of the exhaust; the gabled part has a turbine. The old gabled part had no soffit vents at all and I am installing some. Still, my concern is that without some intake vents on the shed roof I don't think I'll have enough intake. I'm glad the vent design I linked seemed to be acceptable.
For more information from other sources try http://www.google.com using the words "turbine roof vent".
Best wishes for cooler days.