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Posted by Robert Gammon on May 17, 2006, 4:04 pm
Joseph Meehan wrote:
> floatee@gmail.com wrote:
>
>> a roofer just walked through my finished attic, trying to give me
>> ideas about ventilation. at the moment, the roof has none at all.
>> (it's a 1930 bungalow, about 1800 sq ft, attic and main floor
>> together). and boy does it get hot up there.
>>
>> at first he talked about adding 4-5 roof vents onto the roof on the
>> non-visible side (north facing), along with a ridge vent. cost would
>> be about 150 per vent installed, with $300 for the ridge vent.
>>
>> but the more he thought about it, the more he thought a powered roof
>> vent would be the ticket. he said the one unit could solve all my
>> ventilation needs, that with one of them i'd no longer really need any
>> additional roof vents or a ridge vent. he said the vent itself would
>> cost about $400, with $200 to install it.
>>
>> so, does all this sound about right and accurate? i live in RI and,
>> believe it or not, during the summer it does get hot here. or at
>> least in my attic it sure does, to the tune of around 130 degrees.
>>
>> thanks for any help you can offer.
>>
>
> You estimates seem high, but it is difficult to tell from here. I
> suggest you get a second opinion locally.
>
> I am not a fan of power vents (pun not intended). They tend to fail
> and they tend to vibrate. Good old natural draft works wonders.
>
>
Powered vent price quote is WAY too high. Home Depot sells several
models, NONE cost more than $90 $200 to cut a hole in the plywood, run
power to the motor, mount the thermostat, install the vent, brace it
adequately, and seal the opening sounds about right.
Adding soffit vents is easy, just cut a hole of the right size and screw
in the grill. Grills are under $10 for a 6x9 size and adding 5 or more
on BOTH sides of the roof is a WISE thing to do. You can install the
soffits, it takes one with a bit more skill to properly install a ridge
vent. Nope not impossible, but the risk of creating a leak says that I
want this job performed by a pro.
However agree that ridge vent plus adequate soffits is the LONG term,
LOWEST cost solution. Powered vents can be troublesome and the motor
DOES need to be replaced from time to time, (maybe twice in 25 years)
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