Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Building & Construction

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

Reply
 
Thread Tools Search this Thread Display Modes
Old 09-12-2007, 09:55 AM   #1
Newbie
 
Join Date: Sep 2007
Posts: 6
Rewards Points: 10
Default

Hear a Banging Noise from Bathroom Fan When its Windy


Hello---I have a bathroom fan that vents through a soffitt---there is a soffit cover with flaps. When its windy outside, I hear a banging/flapping noise through the fan...I do NOT hear it when the fan is on. The soffit cover flaps don't seem to move with the wind...any ideas?

wjk7320 is offline   Reply With Quote
Old 09-12-2007, 09:59 AM   #2
Member
 
Join Date: Jan 2006
Location: Toronto, Canada
Posts: 1,861
Rewards Points: 1,000
Default

Hear a Banging Noise from Bathroom Fan When its Windy


would it be as simple as outside exhausted cover is loose up or got part broken... did you check?

KUIPORNG is offline   Reply With Quote
Old 09-12-2007, 10:18 AM   #3
Newbie
 
Join Date: Sep 2007
Posts: 6
Rewards Points: 10
Default

Hear a Banging Noise from Bathroom Fan When its Windy


Everything is new---we recently put new siding on---the soffits have the vinyl covering with vent holes---the soffit covers are new.
wjk7320 is offline   Reply With Quote
Old 09-12-2007, 10:32 AM   #4
Member
 
Join Date: Apr 2007
Location: Downeast Maine
Posts: 999
Rewards Points: 500
Default

Hear a Banging Noise from Bathroom Fan When its Windy


There's probably a damper flap somewhere in the vent (usually at the outside louver), and that will clap open and closed, especially if you have a window open somewhere in the house.
NateHanson is offline   Reply With Quote
Old 09-12-2007, 11:12 AM   #5
Member
 
Join Date: Mar 2007
Location: Long Island, NY
Posts: 9,519
Rewards Points: 2,000
Default

Hear a Banging Noise from Bathroom Fan When its Windy


As Nate said, there is another flap on the fan where the vent hose is attached. You don't hear it when the fan is on because the fan is holding it open. If the soffit vent is working correctly, it shouldn't be letting too much air back into the hose to effect the fan flapper. Is this a dedicated soffit vent?
Ron
Ron6519 is offline   Reply With Quote
Old 09-12-2007, 11:38 AM   #6
Newbie
 
Join Date: Sep 2007
Posts: 6
Rewards Points: 10
Default

Hear a Banging Noise from Bathroom Fan When its Windy


Yes---its a dedicated soffit vent---the flaps hang down at an angle and are closed when the fan is off----it does sound like the flap from the fan is being opened and closed when it is windy outside---how can I stop the flap from making this noise....?
wjk7320 is offline   Reply With Quote
Old 09-12-2007, 11:59 AM   #7
Newbie
 
Join Date: Sep 2007
Posts: 6
Rewards Points: 10
Default

Hear a Banging Noise from Bathroom Fan When its Windy


Would caulking around the soffit vent cover help? (might it prevent air from flowing up into the ducting causing the fan flapper to move and make noise?)
wjk7320 is offline   Reply With Quote
Old 09-12-2007, 12:37 PM   #8
Member
 
Join Date: Apr 2007
Location: Downeast Maine
Posts: 999
Rewards Points: 500
Default

Hear a Banging Noise from Bathroom Fan When its Windy


See if closing the bathroom door makes a difference.
NateHanson is offline   Reply With Quote
The Following User Says Thank You to NateHanson For This Useful Post:
jcfmustang (03-29-2011)
Old 09-12-2007, 01:20 PM   #9
Newbie
 
Join Date: Sep 2007
Posts: 6
Rewards Points: 10
Default

Hear a Banging Noise from Bathroom Fan When its Windy


Still happens when the door is closed....
wjk7320 is offline   Reply With Quote
Old 09-12-2007, 03:43 PM   #10
Member
 
Join Date: Jan 2006
Location: Toronto, Canada
Posts: 1,861
Rewards Points: 1,000
Default

Hear a Banging Noise from Bathroom Fan When its Windy


You should lift the fan cover to check if the noise is indeed from the fan flag first... this is a malfunction fan then if this is the case in my opinion...
KUIPORNG is offline   Reply With Quote
Old 09-12-2007, 05:19 PM   #11
Member
 
Join Date: Mar 2007
Location: Long Island, NY
Posts: 9,519
Rewards Points: 2,000
Default

Hear a Banging Noise from Bathroom Fan When its Windy


The noise from the flapper is from air leaving the house, not air entering it. Air is not coming in the soffit vent.
I'm not really convinced the soffit vent is functioning properly. If the flapper is in place on the soffit vent it should preclude air movement in the duct to the fan. If wind is blowing outside, past the soffit vent, it's possible it could draw the soffit flapper open. But it would take a sustained wind to also effect the flapper on the fan.
How close the the soffit vent is the fan?
Easy experiment. Immobilize the vent flapper and see if the fan flapper, well, flaps.
Ron
Ron6519 is offline   Reply With Quote
The Following User Says Thank You to Ron6519 For This Useful Post:
jcfmustang (03-29-2011)
Old 09-12-2007, 06:44 PM   #12
newer than a newbie...
 
Join Date: Mar 2007
Posts: 130
Rewards Points: 75
Default

Hear a Banging Noise from Bathroom Fan When its Windy


Our bathroom fan makes a similar sound on very, very windy days. I'm thinking it's just the fact that there is a natural air pressure point which causes the noises that you cannot do anything about. I think if you were to go to the roof and cover up the air vent (which is not to code I would think), the noises would disappear.

In fact, when in the washroom, we can clearly hear the voices of kids playing basketball on our dead end street, which echoes through the bathroom vent. I think this is as design?
mcvane is offline   Reply With Quote
Old 09-12-2007, 06:44 PM   #13
Newbie
 
Join Date: Sep 2007
Posts: 6
Rewards Points: 10
Default

Hear a Banging Noise from Bathroom Fan When its Windy


I've tried immobilizing the soffit vent flaps and the fan flapper still flaps when its windy...I think this is because the openings to the soffit vent are exposed directly to the wind and some wind leaks into the duct and causes a backdraft....any way to correct this?
wjk7320 is offline   Reply With Quote
Old 09-12-2007, 10:13 PM   #14
Member
 
Join Date: Mar 2007
Location: Long Island, NY
Posts: 9,519
Rewards Points: 2,000
Default

Hear a Banging Noise from Bathroom Fan When its Windy


As I said before, it's air coming out of the duct that causes the fan flapper to move, not air going in. You can try adding another flapper at the end of the duct,before it's attached to the soffit vent. Or trying a different design in soffit vents.
Ron

Ron6519 is offline   Reply With Quote
Reply


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
Wiring in New Addition? sandyman720 Electrical 6 11-27-2011 03:34 PM
Flush toilet, hear shower drain noise joedadog Plumbing 1 04-01-2006 12:52 AM




Top of Page | View New Posts

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