Page 1 of 2 12 LastLast
Results 1 to 10 of 14
  1. #1
    Elite Member
    Join Date
    Mar 2005
    Posts
    2,587
    Location
    Bedford, VA
    Tractor
    John Deere 2320

    Default Insulation above bathroom vent

    We got a very light snow a while back and I noticed there was a 18"x 18" spot on our hip roof that was not snow covered.. From the attic I can see that the spot is right above a halfbath exhaust vent/light and there was no insulation covering the vent ..

    Should there be insulation covering this vent?

    Brian
    Bedford, VA
    2320 w/ 62D MMM, 200CX FEL, Pats EZ Change, LX4 Cutter
    Co-owner (with my father) of John Deere 790, 30 HP, 4x4, 513 cutter, 70 FEL
    2012 Nissan Xterra Pro-4x

  2. #2
    New Member
    Join Date
    Aug 2010
    Posts
    10
    Location
    Maryland
    Tractor
    Kubota BX24

    Default Re: Insulation above bathroom vent

    Is this a fan/light combination?

    Most of these fixtures are rated for contact with insulation.
    You will want to make sure it is before you cover it.

    Does the vent go outside or just dump into the attic?

  3. #3
    Gold Member Mounted Madness's Avatar
    Join Date
    May 2009
    Posts
    423
    Location
    Cobble Hill, British Columbia
    Tractor
    2014 BX2370 as of today

    Default Re: Insulation above bathroom vent

    There was a repair clip on "This Old House" last fall. Here's a link for you to take a look at. I think it'll answer most of your questions/concerns.

    Ventilation | How-to | This Old House

  4. #4
    Platinum Member
    Join Date
    Apr 2007
    Posts
    686
    Location
    Central Ohio
    Tractor
    Yanmar 2402D

    Default Re: Insulation above bathroom vent

    I have made a box out of 2" Dow Score board over them. I used an ahesive for foam insulation to hold it in place.

    If it comes in contact with the fan make sure it is rated for "Insulation Contact".

  5. #5
    Platinum Member Craig Clayton's Avatar
    Join Date
    May 2009
    Posts
    863
    Location
    Uxbridge Ontario Canada
    Tractor
    L2250 Kubota

    Default Re: Insulation above bathroom vent

    Make sure you exhaust fans vents out properly or you will have MAJOR problems in your attic. I strongly agree with take your info from This Old House.
    Craig Clayton

  6. #6
    Elite Member
    Join Date
    Mar 2005
    Posts
    2,587
    Location
    Bedford, VA
    Tractor
    John Deere 2320

    Default Re: Insulation above bathroom vent

    Thanks.. it is a light/fan combo and is vented to the outside - Ill see if I can dig up the owners manual and see if it is rated for insulation contact

    brian
    Bedford, VA
    2320 w/ 62D MMM, 200CX FEL, Pats EZ Change, LX4 Cutter
    Co-owner (with my father) of John Deere 790, 30 HP, 4x4, 513 cutter, 70 FEL
    2012 Nissan Xterra Pro-4x

  7. #7
    Gold Member
    Join Date
    Sep 2008
    Posts
    332
    Location
    Poniatowski, WI
    Tractor
    Bobcat CT225

    Default Re: Insulation above bathroom vent

    Another question, was the fan intentionally not covered with insulation, or is it leaking and blowing the insulation away from itself? (Assuming loose cellulose or fiberglass, not bats). As others have mentioned, if it is IC, bury it, otherwise build a box around it and bury that instead.

    -rus-
    --
    Bobcat CT225
    middle buster, three-point forks, chain-on brush forks
    "borrowed" drag & disc stored at my house

  8. #8
    Gold Member SARG's Avatar
    Join Date
    Aug 2009
    Posts
    479
    Location
    Upstate New York
    Tractor
    NH T1030- 49G Brockway

    Default Re: Insulation above bathroom vent

    Last summer I noted our roof sheathing i.e. plywood was turning up at the edges creating humps that were lifting the shingles. Found out that the vent stack pipe had an opening that was allowing moisture from the home to enter the attic space.

    Had to replace three sheets of plywood and the shingles...... after replacing the vent stack.

  9. #9
    Super Member CompactTractorFan's Avatar
    Join Date
    Jul 2010
    Posts
    7,958
    Location
    Pennsylvania
    Tractor
    Kubota BX25

    Default Re: Insulation above bathroom vent

    Our vent is vented to the attic...
    Kyle - CompactTractorFan

    Kubota BX25 w/R4's (23 hp, 17.7 PTO hp), Loader, Backhoe, 60" Mid Mount Mower, Cyclone Rake Z-10 Lawn Vacuum, CountyLine Carryall, Ferris 48" Walk-Behind Mower, Honda 21" Walk-Behind Mower, Mighty Mac 4" Chipper/Shredder,
    2000 Dodge Intrepid, 2012 Ford F-150 EcoBoost

  10. #10
    New Member
    Join Date
    Aug 2010
    Posts
    10
    Location
    Maryland
    Tractor
    Kubota BX24

    Default Re: Insulation above bathroom vent

    If the unit is a Nutone Broan 744 - which is the typical builder grade unit for this application(at least for the houses I work in). Then it is approved for contact with insulation. But a foam box as mentioned earlier adds insulation as well as prevents air leaks. A foam box sealed to the drywall with loose fill insulation on top would be your best DIY combination.

    If you build a foam box make sure you use a glue or caulk that will not "eat" the foam like most generic construction adhesive will.

Page 1 of 2 12 LastLast

Similar Threads

  1. ? make your own cellulose insulation?
    By BHD in forum Build-It Yourself
    Replies: 19
    Last Post: 04-23-2010, 12:27 PM
  2. 5500 trans vent leak
    By walt5500 in forum Mahindra Owning/Operating
    Replies: 7
    Last Post: 06-18-2009, 06:59 PM
  3. Insulation over HVAC system in Attic
    By dmccarty in forum Related Topics
    Replies: 12
    Last Post: 10-13-2008, 07:13 PM
  4. Bathroom exhaust fan AND laundry vent question
    By Richard in forum Projects
    Replies: 24
    Last Post: 02-08-2006, 09:04 PM
  5. Pole barn insulation advice
    By Heath568 in forum Projects
    Replies: 26
    Last Post: 02-02-2006, 08:31 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
© 2014 TractorByNet.com. TractorByNet is a registered trademark of IMC Digital Universe, Inc. Other trademarks on this page are the property of their respective owners.