Cooling an attic.........
 

The best thing you can do is have a continuous ridge vent installed along the peak of the roof. That will give you continuous hot air venting without having to install a fan or other type of powered vent. I had that done several years ago when I had my home re-roofed and it made a lot of positive difference!

Too late! Re-roofed 5 years ago. I doubt that I'll live long enough to need another.

Thanks, though.

We switched to a ridge vent on the roof after a hail storm destroyed the original roof. The builder had put in electric powered fan motors that had a temp sensor and they kicked on at some preset temp. After several years they start to make a lot of noise, and I had to replace one. I can tell you standing on a ladder in the attic to get up 15 feet to the motor, and take it out from underneath is something I would never do again.

The ridge vents are nice.

Ridge vent...........
 

A roofer could install a new ridge vent over your existing roof since shingles overlap from bottom to top. Probably would not be too expensive. I would at least call a roofer and ask!

Good to know. Thanks!

Thanks! Low E is the schizzle, for sure. I already replaced one with Low E and will do the others too at some point.

My understanding is the ridge vent is not as effective without soffit venting to help the flow.

I'm not saying a ridge vent isn't a good idea, but that the whole venting process usually includes more than one aspect for it to all come together.

When we re-roofed my house in metal earlier this year, we decided against a ridge vent, and just stay with the two existing gable vents and passive venting. They are oriented north-south so that should work the best for our prevailing wind directions here.

Earlier in the thread I mentioned the prospect of adding a thermostatically controlled fan to push hot air out one end and that is something I'm probably going to try. I have a recording thermometer on order to help me with stats.

Bingo! That last piece of the missing puzzle.

The ridge vent vents the air inside the attic space.
-Heat travels to the ridge.
-Outside winds help pull air out.

It cools the underside of the roof (rafters/sheeting/shingles) with airflow.

But it doesn't work without an incoming source of air, lower down, where it is cooler.

That's exactly what I tell my clients and never forget to double up on the cost of the engineering. how the hell do you think I pay for my "Porch" parts?

It works, just not as effective. Hot air rises and if there's an exit, it will go out through there as long as there another source or opening it will work. Its too slow for me and by the time it makes any difference, the whole damn house it hotter then heck. I like moving air mechanically, it just a bigger helper doing the work

Pop those fans right on the inside of the gable vents and have one pull and one push air through. You can even install a shield to push deflect the air up near the ridge to help recirculate the hottest part of the attic. Those fan will help a lot. During those 95 degree days here in socal, they are running 8-9 hours daily.

So you're saying use 2 fans, huh? Interesting. I'm on board but am going to take it one step at a time.....and analyze. ;)

To that point....I received my recording thermometer with three sensors and have two sensors outside and one in the attic.

Guess which one is in the attic? :p

http://forums.pelicanparts.com/uploa...1587159018.JPG

Wait another month, it aint gonna to be 78, more like 98:eek:

75deg in the attic space in Florida?

What kinda shingles you got?
Mexican clay tiles coated with titanium white?

BTW...if you are feeling a bit too hot....it is SNOWING in Michigan today.

Yup. And we have been breaking records for heat on top of the usual Florida "God-awful" heat we get. I know it's also happening elsewhere so don't mean to sound like we're special or anything....lol....

I have a 2 car garage with a flat roof and peel and stick that we replaced the tar and gravel with about 10 years ago. I just bought some Black Jack silicon roof paint to apply to that to get the reflective thing going there. It is not climate controlled (yet) so hoping this will help for that structure.


New metal roof which replaced shingles.

Looking at the image I uploaded, the top reading is inside my home where the base unit sits. #1 is outside front patio, #2 is attic, and #3 is outside back patio. Note the 10 degree higher temp delta. And that's under cloudy skies! :eek:


Yeah that doesn't help, thanks. :D Not too bad here yet - but it's coming.....

Every time I see the title of this thread I wonder why anyone want to try to store light. Just flip the switch and take the light with you.