Another 100 Year Old House Insulation Question - Insulation - DIY Chatroom Home Improvement Forum
Advertisement


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

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

Reply
 
Thread Tools Search this Thread
Display Modes
Old 08-18-2014, 09:22 PM   #1
Newbie
 
Join Date: Aug 2014
Posts: 1
Rewards Points: 10
Default

Another 100 year old house insulation question


Hello,
I was hoping someone could help me figure out how to most effectively insulate my old house ceilings that are beadboard and plank.

The previous owner only threw paper backed fiberglass batt insulation down between the ceiling joists. However, there is no air barrier, like you have with sheetrock, so I am not sure the insulation is doing much good.

When I started researching this, I think I came up with more questions than answers. For instance, how do you create an air barrier without creating a vapor barrier? Do you want a vapor barrier? What about attic venting? Currently, the attic is not vented with a metal roof. I was thinking I probably need to at least add some gable vents. I really don't want to put any sort of venting through the metal roof, in fear of creating leaks. The area is southeast Texas, where we have hot, humid summers. Another convoluting factor - I have read that you shouldn't use blown-in insulation with plank or bead board ceiling because you risk it migrating down to the living area over time.

The best I have come up with is to remove the batt, lay down some foam board between the ceiling joists (possibly sealing between the foam board and ceiling joists with spray foam?), then lay the insulation back down. However, I am not sure if this is violating the rules for create a vapor barrier on the wrong side of the insulation (seems like most things I have read say to put the foam board/air dam on the hot/humid side of the insulation).

Any help or guidance would be greatly appreciated.

Thanks in advance.

Joseph
JSM1 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 08-18-2014, 10:15 PM   #2
Exterior Construction
 
Windows on Wash's Avatar
 
Join Date: Aug 2011
Location: Washington DC Metro Area (VA, MD, DC)
Posts: 26,041
Rewards Points: 878
Blog Entries: 41
Default


Pictures and location of the home are going to help here Joseph.
Windows on Wash is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 08-19-2014, 07:41 AM   #3
Member
 
Join Date: Nov 2011
Location: Hartfield VA
Posts: 37,113
Rewards Points: 1,866
Default


Google "insulation zone map" for the suggested minimum amounts of insulation you should have.
If they installed that insulation with the paper side down I'd just leave it and go over it with blown in insulation if you need more.
Attic needs to be air sealed before adding more insulation.
Air sealing is nothing more then sealing up any gaps around any wiring, plumbing or ceiling fixtures with expanding foam.
In order for a gable vent to work you also need soffit vents.
__________________
When posting in forums, letting us know your location will help others give better feedback/advice/solutions to your questions
joecaption is online now   Reply With Quote
Sponsored Links
Advertisement
 
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
Insulating your attic Bob Mariani How To Guides 5 07-07-2013 08:49 PM
Whole house insulation advice... Huggins90 Insulation 7 02-02-2013 09:46 PM
difference between fiberglass insulation for house and ovens Druidia Insulation 2 08-03-2012 08:44 AM
rafter insulation question Jeremy Hillary Boob, PhD Building & Construction 7 08-02-2009 08:19 AM
attic insulation question dderolph Building & Construction 10 11-03-2007 05:21 PM




Top of Page | View New Posts