Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Roofing/Siding

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 05-08-2013, 09:15 PM   #1
Newbie
 
Join Date: May 2013
Posts: 4
Rewards Points: 0
Share |
Question

Gable mount fan with no undereave vents


I bought a house that was built in 1951. The house has really no eaves around the entire house, so there are no undereave vents. The house does have a Gable mounted vent fan. I needed to replace it because it makes some horrible rattling noises, but when I was reading the instructions, they were talking about how many undereave vents you need for this particular fan and such.

The only vents that I can see that my attic has are roof vents and the gable fan. Is that bad?

Thanks,

John

postalservice14 is offline   Reply With Quote
Old 05-08-2013, 09:45 PM   #2
DIY staff
 
Join Date: Sep 2009
Location: Kane county,Illinois
Posts: 21,637
Rewards Points: 30
Default

Gable mount fan with no undereave vents


Yep--that's bad----the ideal attic receives fresh air from the soffits and that coold dry air passes along the roof sheeting and out through the vents---

Tell us about the house? Ranch? Cape Cod?
Any new roof going on soon?

I once saw a retrofit vent for the facia posted by The Lone Framer---but that bookmark vanished with a fried computer--

__________________
New members: Adding your location to your profile helps in many ways.--M--
oh'mike is offline   Reply With Quote
Old 05-08-2013, 09:53 PM   #3
Newbie
 
Join Date: May 2013
Posts: 4
Rewards Points: 0
Default

Gable mount fan with no undereave vents


Thanks for the quick reply. It's a ranch style, around 1700 square feet. The attic, I'm guessing, is around 1000-1200 square feet though.

I've got about ~10 years left on my roof I'm guessing.

I'm looking at something like this: http://www.gaf.com/Roofing/Residenti...asciaFlow_Vent

But I'd be very interested in what other idea the Lone Farmer had.
postalservice14 is offline   Reply With Quote
Old 05-08-2013, 10:11 PM   #4
DIY staff
 
Join Date: Sep 2009
Location: Kane county,Illinois
Posts: 21,637
Rewards Points: 30
Default

Gable mount fan with no undereave vents


That looks like what he posted a picture of-----perhaps a different brand but the same idea---

Do get them installed----and be sure the insulation in the attic is not blocking the soffit area--there are baffles available that will keep the insulation away from the roof deck.
__________________
New members: Adding your location to your profile helps in many ways.--M--
oh'mike is offline   Reply With Quote
The Following User Says Thank You to oh'mike For This Useful Post:
postalservice14 (05-08-2013)
Old 05-08-2013, 10:16 PM   #5
Newbie
 
Join Date: May 2013
Posts: 4
Rewards Points: 0
Default

Gable mount fan with no undereave vents


Great, thanks for your help.

So do you think the fan is useless right now? Is it doing more harm then good? Should I just turn it off?

John
postalservice14 is offline   Reply With Quote
Old 05-08-2013, 10:29 PM   #6
Member
 
Join Date: Nov 2011
Location: Hartfield VA
Posts: 26,389
Rewards Points: 108
Default

Gable mount fan with no undereave vents


All that fans doing is causing a negative pressure in the attic and sucking the heated or cool air out of the main home.
Got a picture or two of the house, showing the fashia areas?
http://www.dciproducts.com/html/smartvent.htm
__________________
When posting in forums, letting us know your location will help others give better feedback/advice/solutions to your questions
joecaption is offline   Reply With Quote
Old 05-08-2013, 10:48 PM   #7
Newbie
 
Join Date: May 2013
Posts: 4
Rewards Points: 0
Default

Gable mount fan with no undereave vents


A couple things.

I just remembered. My intake duct for my furnace comes from the attic into my garage. The whole for that duct is much bigger then the duct itself (I'd say around 8 square feet. So my guess is the fan is drawing a lot of it's air from the garage. And the garage is hardly air tight. :-) Anyway, still probably should have some vents under my eaves, but thought that was worth mentioning.

Pictures attached. Hopefully, they were what you were looking for.
Attached Thumbnails
Gable mount fan with no undereave vents-dscn2974.jpg   Gable mount fan with no undereave vents-dscn2975.jpg   Gable mount fan with no undereave vents-dscn2976.jpg   Gable mount fan with no undereave vents-dscn2977.jpg  
postalservice14 is offline   Reply With Quote
Old 05-08-2013, 11:07 PM   #8
Member
 
Join Date: Nov 2011
Location: Hartfield VA
Posts: 26,389
Rewards Points: 108
Default

Gable mount fan with no undereave vents


I just hate it when I see a house built that way.
Over hangs help the siding and trim last longer, there not only a place to add the needed vent.
Looks like your stuck with adding them to the roof.

Take a straw and suck on one end and place your finger over the other end. That how that fan is working, with no make up air it's doing nothing.
__________________
When posting in forums, letting us know your location will help others give better feedback/advice/solutions to your questions
joecaption is offline   Reply With Quote
Old 05-09-2013, 07:44 AM   #9
Roofmaster
 
Join Date: Oct 2012
Location: Maryland
Posts: 3,621
Rewards Points: 22
Default

Gable mount fan with no undereave vents


Just put a gable end louver in the opposite end of your home, and clean your camera lens.

Under deck ventilation has very little to do with cooling the roof shingles. It has to do with eliminating the threat of ice dams, and the problem of mold that occurs from the dew point falling just under the deck, and this occurs from heat loss from the interior.

Millions of homes were built in the 50's with little to no ventilation at the eaves and ridge, and still the shingle roofs installed back then lasted 30 years or so, and ice dams never occurred.

Now why do you suppose that is?
__________________
" A lot of men build things, and a lot of things fall down "

jagans is offline   Reply With Quote
Old 05-09-2013, 11:24 PM   #10
Registered User
 
Join Date: Mar 2009
Posts: 9,968
Rewards Points: 0
Default

Gable mount fan with no undereave vents


"The only vents that I can see that my attic has are roof vents and the gable fan. Is that bad?"---------- probably. Depends on; 1. how many, what NFVA of roof vents; 2. where the house is located; 3. if you see evidence of ice dams, asphalt shingle curling or moisture on attic framing; 4. CFM of the fan; 5. if the attic is air-sealed or not; 6. if bath fan exhaust is in attic; 7. if HVAC is in attic; 8. type, amount of insulation.

Gary
PS. Welcome to the forums!
__________________
If any ads are present in my answer above, I do not condone/support/use the product or services listed, they are there against my permission.
Gary in WA is offline   Reply With Quote
Old 05-11-2013, 09:02 PM   #11
Member
 
Join Date: Apr 2007
Posts: 515
Rewards Points: 10
Default

Gable mount fan with no undereave vents


It must be something amazing that my old 50's house didn't fall in on itself, suffer from a virulent mold issue, or have some other terrible goings on.


No eaves, no roof vents. Only those two lowly gable vents, one with a fan that I added on in the 70's, and the roof was still looking good many years after I moved on.


ktkelly is offline   Reply With Quote
Old 05-12-2013, 11:17 PM   #12
Registered User
 
Join Date: Mar 2009
Posts: 9,968
Rewards Points: 0
Default

Gable mount fan with no undereave vents


Every house is different; http://www.fpl.fs.fed.us/documnts/pdf1999/tenwo99a.pdf

Gary

__________________
If any ads are present in my answer above, I do not condone/support/use the product or services listed, they are there against my permission.
Gary in WA is offline   Reply With Quote
Reply

Tags
eaves, gable fans, roof vent, vents


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
need some help with ridge vent + soffit vents allthumbsdiy Roofing/Siding 14 10-19-2012 03:44 PM
new cool vent roof; close gable vents? MNhome Roofing/Siding 17 08-22-2012 09:32 AM
Powered Vent or Ridge Vent matt151617 Roofing/Siding 27 03-28-2012 02:13 PM
Question versus ridge/gable vents clashley Roofing/Siding 12 12-31-2010 08:13 PM
Leaking attic gable vents MoMo Roofing/Siding 2 04-02-2005 09:00 PM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.