[Greenbuilding] [BULK] Re: [BULK] Re: vented roofs

[Lawrence Lile]

I've used power vents before, too, and like them, they can ventilate a
roof in cases where natural ventilation doesn't cut it. Although a home
inspector told me that he always finds them burned out (who would know?)
They sell solar power vents, an interesting idea.   

With R-50 or R-60 in the attic, maybe venting won't make much difference
in the temperature on the upper floor.  I'm willing to bet your 1960's
house had but a whiff of insulaiton in the attic. 

--Lawrence Lile

-----Original Message-----
From: greenbuilding-bounces at listserv.repp.org
[mailto:greenbuilding-bounces at listserv.repp.org] On Behalf Of Chris
Green
Sent: Monday, September 18, 2006 9:31 PM
To: Greenbuilding at listserv.repp.org
Subject: [BULK] Re: [Greenbuilding] [BULK] Re: vented roofs
Importance: Low

Lawrence Lile wrote:
> Despite some strong arguments on this list, I could not be convinced 
> to install a "hot roof" nonventilated attic.  I still don't know if I 
> made the right choice, but that's how we are building it.
>   
The 1960's era house I live in had screened vents that were way too
small, and in the hottest part of the year the heat in the attic would
build up past the 150*F range and radiate into the top/ main floor. When
my landlady's son put in power vents, set to turn on at a certain
temperature,  the attic temps dropped and the upstairs apartment became
much cooler compared to previous years. Good quality non-powered
'whirly-bird' or turbine vents would be nearly as effective and use no
electricity.

Chris Green.

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