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I am in the process of installing solar power on our roof. As part of the project I have painted the roof white (solar panels are more efficient the cooler they are.) The old color was blue. The temperature difference is amazing.
On occasion I need to do jobs in ceiling crawl spaces. If it is not a cloudy day, I try to do this in the am. I once measured a temperature of 125 degrees in a crawl space.
Jerry
Art and Orchids B&B
http://www.artandorchids.com
Posts: 6,214
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We have a gable end solar vent (if you have gable end attic space...) that was fairly easy to put in (no through the roof stuff!)
We also added reflectix attic radiation barrier to all of the attic (have weird suspended ceiling, so popping in & out was fairly easy....) The radiation barrier really helped... could feel the difference as we were installing... almost like putting up an umbrella....
Newer roof metal from HPM is treated with a radiation barrier topcoat... also good for reducing attic temps...
The most important thing about attic ventilation is upward flow.
You can add all the vents you want, but if you don't have sufficient soffit vents under your eves you'll never get the thing to exhaust right.
If you have vents at you ridges and soffits, natural convection will work miracles for you.
Radiant barrier is also a huge help.
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Thanks to Lokahi I contacted Ken Sheets at;
"Hawaii Skylights and Solar Fans" a Solatube Premier Dealer - Kenneth and Deborah Sheeks, Owner/Certified Installation Consultant. 808.345.1779-cell.
www.hawaiiskylights.com or email-info@hawaiiskylights.com. PO Box 1169 Kapa`au HI 96755
We will have one fan installed to vent our 1300 sf attic. The installed price seems very reasonable. Hopefully that will do the trick!
Thanks to everybody who offered advice or experience.
Jon
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Carey: We are looking to install a solar gable vent and were wondering if you remember where you got yours and approx what it cost. Tried to e-mail you through PW, got a delivery failure. Dickwilson836@msn.com. Thanks Dick & Kathy.
dick wilson
"Nothing is idiot proof,because idiots are so ingenious!"
dick wilson
"Nothing is idiot proof,because idiots are so ingenious!"
Posts: 6,214
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Joined: Feb 2006
We got ours at Lowes in Kona.... it is $202.
It was fairly easy to install
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I helped my brother put a ridge vent along the entire length of his roof. That helped a lot. I later installed a whole-house fan that sucked air from the kitchen and pushed it into the attic. This forced the hot attic air out through the ridge vent and sucked cool outdoor air in through the doors and windows. Between the two it went from 130 degrees to 105 degrees in the attic with a noticeable decrease in radiant heat from the ceiling. You could feel the radiant heat on your face when you looked up, before.
If you have enough vertical distance from where the cool air enters the attic under the eaves to where the air leaves along the ridge, through roof vents or gable end vents, the chimney effect will be enough. If you put in a fan powered roof vent but don't ensure enough intake area under the eaves, you won't get the full benefit of the ventilation.
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Cool, Mahalo Carey.
dick wilson
"Nothing is idiot proof,because idiots are so ingenious!"
dick wilson
"Nothing is idiot proof,because idiots are so ingenious!"
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Joined: Jan 2006
Of course its May and everyone is attacking the same problem!! ha ha
We are fixing sheet rock and insulating ceiling etc in a loft room that was always unbearable even in the winter during the afternoon. We added two 3' x 2' openings (already a 9046 window existing) and screening them (eventually awning or jalousies will go in but not this week!) Also when the sheet rock was being fixed it allowed the old guy to get into the attic and add gable end vents and insulation. The temp dropped about 10 degrees in the loft in the afternoons. When the trades are blowing it is totally comfortable, when they are dead the loft still ends up with a chimney effect and is cooler.
Has anyone had any luck with floor venting on P&P? Does it create enough air flow and how many did you need to put in if so? Did anyone check actual temp under house? What is the temp diff under house and ambient interior temp?
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Mylar is cheap and works great. you can really feel the difference.
Daniel R Diamond
Daniel R Diamond
