Chimney Insulation - Concrete, Stone & Masonry - DIY Chatroom Home Improvement Forum


Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Concrete, Stone & Masonry

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

Reply
 
Thread Tools Display Modes
Old 01-17-2014, 04:06 PM   #1
DIY Homeowner
 
Barry J's Avatar
 
Join Date: Nov 2008
Location: Gardner,MA
Posts: 224
Rewards Points: 154
Default

Chimney insulation


My chimney goes thru the middle of my house. Right where my chimney joins my ceiling, on one side, I've noticed a dark yellow build-up. I painted over it and in two days it was back. I went in the attic and noticed metal flashing type of material running around the brick chimney, parallel to the ceiling. That metal strip had the same type of build-up on it but just a little. No obvious wet spots on chimney. The chimney was partialy covered with un faced fiberglass insulation. I put that back and also stuffed some into the two inch space above that metal strip. I then went up to the roof and found no obvious leaking source, but noticed my chimney cap was covered with a black rubber type material, with a few holes (small) in it. What do you think is the cause of the dark yellow build-up on my ceiling??
Should I wash the area with TSP and replace the pop corn type material and ttry to paint again??
Any suggestions
Thanks Barry

Advertisement

Barry J is offline   Reply With Quote
Old 01-17-2014, 06:42 PM   #2
Member
 
Join Date: Nov 2011
Location: Hartfield VA
Posts: 27,811
Rewards Points: 738
Default

Chimney insulation


Anyone in the house smoke of do you burn candles?
I'm just guessing the air leak may be acting like chimney and sucking dirty air into the attic. When the warm air hit the colder metal the moisture condenses and more dirt sticks to it.
It's called ghosting.

Advertisement

__________________
When posting in forums, letting us know your location will help others give better feedback/advice/solutions to your questions
joecaption is offline   Reply With Quote
Old 01-17-2014, 06:45 PM   #3
DIY Homeowner
 
Barry J's Avatar
 
Join Date: Nov 2008
Location: Gardner,MA
Posts: 224
Rewards Points: 154
Default

Chimney insulation


Nobody smokes, we do burn candles but not that often
Barry J is offline   Reply With Quote
Old 01-17-2014, 06:53 PM   #4
Member
 
Join Date: Nov 2011
Location: Hartfield VA
Posts: 27,811
Rewards Points: 738
Default

Chimney insulation


http://inspectapedia.com/interiors/ThermalTracking.htm
__________________
When posting in forums, letting us know your location will help others give better feedback/advice/solutions to your questions
joecaption is offline   Reply With Quote
Old 01-17-2014, 08:22 PM   #5
DIY Homeowner
 
Barry J's Avatar
 
Join Date: Nov 2008
Location: Gardner,MA
Posts: 224
Rewards Points: 154
Default

Chimney insulation


The area is more yellowish



Chimney insulation-image-309790160.jpg

Here is what it looks like
Barry J is offline   Reply With Quote
Old 01-18-2014, 12:16 PM   #6
Member
 
Join Date: Jun 2009
Location: Somerset, England
Posts: 680
Rewards Points: 500
Default

Chimney insulation


Could be Hygroscopic salts.
http://www.dynamicpropertycare.com/s...3f9d5b29095ca8
stuart45 is offline   Reply With Quote
Old 01-18-2014, 04:25 PM   #7
DIY Homeowner
 
Barry J's Avatar
 
Join Date: Nov 2008
Location: Gardner,MA
Posts: 224
Rewards Points: 154
Default

Chimney insulation


How should I fix it, wrap the chimney better with insulation down to that metal strip, patch any hole on the outside of the chimney??
Barry J is offline   Reply With Quote
Old 01-18-2014, 06:36 PM   #8
Exterior Construction
 
Windows on Wash's Avatar
 
Join Date: Aug 2011
Location: Washington DC Metro Area (VA, MD, DC)
Posts: 7,151
Rewards Points: 3,318
Default

Chimney insulation


What is the chimney flashing like on the roof side condition wise?

Also, is the chimney sealed tight where it penetrates the ceiling? Warm moist air hitting that cold metal = condensation.

The metal in the attic should be air tight as well so as to prevent the moisture carried in the air from reaching the attic air.
Windows on Wash is offline   Reply With Quote
Old 01-20-2014, 08:18 AM   #9
DIY Homeowner
 
Barry J's Avatar
 
Join Date: Nov 2008
Location: Gardner,MA
Posts: 224
Rewards Points: 154
Default

Chimney insulation


The outside flashing looks good,

How should I seal it, I've noticed a slight space where the ceiling and chimney meet, should I use chaulking from the inside ceiling?
Thanks
Barry J is offline   Reply With Quote
Old 01-22-2014, 09:28 AM   #10
DIY Homeowner
 
Barry J's Avatar
 
Join Date: Nov 2008
Location: Gardner,MA
Posts: 224
Rewards Points: 154
Default

Chimney insulation


Should I seal from the attic or ceiling??? In the attic I can't use "Great Stuff" near the chimney correct??

Advertisement

Barry J is offline   Reply With Quote
Reply


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
Colonial Split level drew7ster Insulation 11 01-09-2013 04:44 PM
Chimney Rattles/Sways in Windy Weather cprice12 Concrete, Stone & Masonry 10 09-28-2012 11:36 PM
Chimney Liner Insulation Rockford Insulation 2 08-13-2012 10:22 AM
Chimney liner insulation Rockford HVAC 0 08-07-2012 09:38 AM
Insulation Around Chimney myfirstrodeo Insulation 2 07-19-2012 01:44 PM




Top of Page | View New Posts