Go Back   DIY Chatroom Home Improvement Forum > DIY Repair > General DIY Discussions

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

Reply
 
Thread Tools Search this Thread Display Modes
Old 07-16-2007, 01:38 PM   #1
Newbie
 
Join Date: Jul 2007
Posts: 2
Share |
Default

Rigid insulation question


I am replacing a failed ceiling in an 85 year old flat roofed home. When I took out the original ceiling a ton of black particles were in the small attic space. I assume this is years of roofing tar that has fallen through spaces between roof boards. Anyhow, I am considering putting rigid insulation up against the ceiling of the attic (underside of roof boards). Then I plan to put regular rolled insulation between the ceiling rafters before I hang drywall. There is about 18-24 inches of attic space with one vent out the side of the attic.

I am thinking that the rigid insulation will prevent the old black tar from falling and smashing the rolled insulation below and provide and extra layer of heat/cool loss protection.

Is this overkill? Will the rigid insulation actually do me any good when there is an attic vent?

Endeavor is offline   Reply With Quote
Old 07-17-2007, 06:18 AM   #2
Agent 000
 
SecretSquirrel's Avatar
 
Join Date: Jun 2007
Posts: 334
Default

Rigid insulation question


You absolutely should not insulate the underside of your roof decking. The reason being; it requires exposure to insure that adequate ventilation is taking place. Without proper ventilation, condensation can occur resulting in mold, rot, and potential damage to your ceilings. An attic is not meant to be enveloped. It should be hot in the summer and cold in the winter. The best place to put your money is in insulation between and above the ceiling joists.

As far as the debris falling out of the decking... put up chicken wire or something else to restrain it. Whatever you do make sure the decking is exposed and has ventilation.

SecretSquirrel is offline   Reply With Quote
Old 07-17-2007, 10:27 AM   #3
Newbie
 
Join Date: Jul 2007
Posts: 2
Default

Rigid insulation question


Very good point on putting rigid insulation against roof decking. I will just insulate the ceiling and perhaps put up some sort of screen to keep debris from falling.

Thanks again.
Endeavor 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
Cape Cod Style House Attic/Crawl Space Insulation Help Danielg Insulation 24 05-21-2012 08:20 AM
Insulation question Outbacker HVAC 16 12-29-2008 09:54 PM
Insulation question hswaters General DIY Discussions 9 12-28-2008 08:18 PM
yet another insulation question bobbyhill Building & Construction 2 12-06-2006 12:01 PM
insulation question steele Building & Construction 4 05-15-2006 08:24 PM




Top of Page | View New Posts

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