Bathroom Fan Duct Not Connected To Roof Cap - HVAC - DIY Chatroom Home Improvement Forum

Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > HVAC


Thread Tools Display Modes
Old 09-29-2015, 12:34 AM   #1
Join Date: Feb 2010
Location: San Jose, CA
Posts: 17
Rewards Points: 24

Bathroom fan duct not connected to roof cap

I'm in the process of renovating a bathroom and noticed when removing the old fan that the exhaust duct ran vertically into the roof cap but wasn't connected to it in any way, rather it was just sitting up in there, being held up by its connection to the fan. Is this a typical installation that I can repeat with the new ducting or does it need to be secured and sealed within the roof cap? I'm concerned about moist air dumping into the attic space rather than completely out the roof cap. Hopefully this pic illustrates the question, you can see all the space around the duct where it pokes up into the cap. Thanks!
Attached Thumbnails
Bathroom fan duct not connected to roof cap-image_1443504773941.jpeg  


Eclipse99 is offline   Reply With Quote
Old 09-29-2015, 09:56 PM   #2
Join Date: Jun 2013
Location: Maine
Posts: 126
Rewards Points: 81

I'd hit that area with a can of spray foam to seal it. All those cobwebs mean there is air leakage coming in there.


MaineLL is offline   Reply With Quote
Old 09-29-2015, 09:58 PM   #3
griz's Avatar
Join Date: Sep 2015
Location: California
Posts: 285
Rewards Points: 570

Very common install for California in homes in your time period.
griz is offline   Reply With Quote

Thread Tools
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
rerplace roof on 200 year old house newroof Roofing/Siding 7 11-24-2013 05:23 PM
Bathroom Exhaust Fan Duct Sizing Lyndon HVAC 6 02-06-2012 07:35 AM
Roof leak nightmare..... it won't stop amandat37 Roofing/Siding 52 04-22-2011 12:47 PM
Wrong roof vent for bathroom exhaust? vanishingson Roofing/Siding 18 04-04-2011 06:25 AM
roof vent opening for bathroom fan pttcc HVAC 3 09-10-2010 12:08 PM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1