Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Building & Construction

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

Reply
 
Thread Tools Search this Thread Display Modes
Old 11-02-2010, 10:20 AM   #1
Newbie
 
Join Date: Dec 2009
Posts: 5
Share |
Question

Installing new attic insulation in old house


Hi guys, I'm looking to put new insulation in the attic of our older home. What's in there now literally looks like dirt (see pics) and there's hardly any of it down. I plan on just buying the rolls of insulation because the attic is pretty small. Here are my questions:

1. Do I put the new stuff right over this old stuff?
2. Paper side down?
3. What can I do or buy to protect the can lights from the new insulation?
4. Is there anything else I should know before starting this project?

Thanks a ton guys!! See the pics of the attic below







Upnya is offline   Reply With Quote
Old 11-02-2010, 11:23 AM   #2
Newbie
 
Join Date: Nov 2010
Posts: 2
Default

Installing new attic insulation in old house


My home is like this. I would suggest renting one of the vacuums that sucks it out from Home Depot/Menards. Get the old stuff out.

The lights should be safe to just roll the new stuff over. If the old stuff is there and isn't catching fire, I don't think you should have a problem, but check the code on the light to make sure it is safe.

Finally, don't buy the paper backed stuff. Either put down plastic before or there should already be plastic in place. Just roll out the non-backed stuff.

I personally removed the old stuff, had plastic in place and blew in insulation from Menards. VERY EASY and much easier than rolling the stuff I did.

Highly recommend it as you can have on person outside stuffing the insulation into the machine and you can be upstairs with the controls and hose.


Good luck!

Nickum7 is offline   Reply With Quote
Old 11-02-2010, 12:16 PM   #3
Member
 
Join Date: Jan 2009
Location: South of Boston, MA
Posts: 17,248
Default

Installing new attic insulation in old house


In order to cover the can lights they must be IC rated
I do not think those cans are
You can either replace them with IC rated
Or keep the insulation 3" away

I would not touch the old stuff....just my preference
It will be a mess to remove/move it
I think I'd just put non-faced insulation on top
Scuba_Dave is offline   Reply With Quote
Old 11-02-2010, 03:21 PM   #4
Chicago, IL
 
Michael Thomas's Avatar
 
Join Date: Jan 2008
Location: Chicago, IL
Posts: 1,037
Default

Installing new attic insulation in old house


Is there any sort of vapor barrier currently installed under the insulation?
__________________
Home Inspections, Infrared (Thermal Imaging) Leak Identification and Inspection Services, Roof, Attic, Building, Basement and Foundation Moisture Intrusion and Water Leak Inspections, Troubled Building Consultations - Serving Chicago and Suburbs http://paragoninspects.com/
Michael Thomas is offline   Reply With Quote
Old 11-02-2010, 09:40 PM   #5
Registered User
 
Join Date: Mar 2009
Posts: 9,968
Default

Installing new attic insulation in old house


You really need to air seal the attic first, click on the download-pdf file in top right-hand corner for around the older lights and the bath fan box. Adding fiberglass before air sealing is pointless, as it's much easier to move a little insulation now to gain access to sealing areas listed: http://www.buildingscience.com/docum...ealing%20guide

They show pictures of light boxes and fan insulation, none with air permeable f.g. It appears you don't have a vapor barrier, what is your location?

Gary
__________________
If any ads are present in my answer above, I do not condone/support/use the product or services listed, they are there against my permission.
Gary in WA is offline   Reply With Quote
The Following User Says Thank You to Gary in WA For This Useful Post:
whataboutj (11-10-2010)
Old 11-02-2010, 09:53 PM   #6
Member
 
Join Date: Jan 2009
Location: South of Boston, MA
Posts: 17,248
Default

Installing new attic insulation in old house


Does that bath fan exhaust to the outside ?
I can't tell if there is an exhaust hose on there
It should not be venting to the attic
Scuba_Dave is offline   Reply With Quote
The Following User Says Thank You to Scuba_Dave For This Useful Post:
Gary in WA (11-03-2010)
Old 11-02-2010, 11:04 PM   #7
Newbie
 
Join Date: Nov 2010
Posts: 1
Default

Installing new attic insulation in old house


Put the new insulation over the old. Blowing it in will save you time and money and you will get a better install with less air gaps. You do not need a paper faced roll. Unfaced or blown-in is all you need. Add a bow in radiant barrier for superior heating and cooling performance.

www.smarthomesllc.net
danielbyrne is offline   Reply With Quote
Old 11-03-2010, 06:33 AM   #8
Chicago, IL
 
Michael Thomas's Avatar
 
Join Date: Jan 2008
Location: Chicago, IL
Posts: 1,037
Default

Installing new attic insulation in old house


Quote:
Originally Posted by danielbyrne View Post
Add a bow in radiant barrier for superior heating and cooling performance.
Before adding any type of "radiant barrier", take a look here:

http://www.greenbuildingadvisor.com/...search-problem
__________________
Home Inspections, Infrared (Thermal Imaging) Leak Identification and Inspection Services, Roof, Attic, Building, Basement and Foundation Moisture Intrusion and Water Leak Inspections, Troubled Building Consultations - Serving Chicago and Suburbs http://paragoninspects.com/
Michael Thomas is offline   Reply With Quote
Old 11-03-2010, 07:08 AM   #9
Mold!! Let's kill it!
 
Join Date: Feb 2008
Location: Central Pennsylvania
Posts: 2,843
Default

Installing new attic insulation in old house


FYI, the stuff you are calling dirt is cellulose fiber insulation. One of the better insulating products out there. I agree, the lights don't look like they are rated for insulation contact. If you add more insulation, you also need to install baffles at the soffit area to prevent insulation from piling up against the bottom of the roof deck and getting out into the soffit where it can block air circulation.
Maintenance 6 is offline   Reply With Quote
Old 11-03-2010, 07:43 AM   #10
Retired from the grind
 
gregzoll's Avatar
 
Join Date: Dec 2006
Location: Midwest - Central Illinois
Posts: 14,023
Default

Installing new attic insulation in old house


What is with all of the wire snakes going everywhere?
gregzoll is offline   Reply With Quote
Old 11-03-2010, 08:00 AM   #11
Enough is Enough
 
H. A. S.'s Avatar
 
Join Date: Aug 2010
Posts: 80
Default

Installing new attic insulation in old house


Agree with Maintenance6, just add more cellulose.
H. A. S. is offline   Reply With Quote
Old 11-03-2010, 08:33 AM   #12
Chicago, IL
 
Michael Thomas's Avatar
 
Join Date: Jan 2008
Location: Chicago, IL
Posts: 1,037
Default

Installing new attic insulation in old house


Quote:
Originally Posted by Scuba_Dave View Post
Does that bath fan exhaust to the outside ?
I can't tell if there is an exhaust hose on there
It should not be venting to the attic
Appears not:



Why that's a bad idea:

__________________
Home Inspections, Infrared (Thermal Imaging) Leak Identification and Inspection Services, Roof, Attic, Building, Basement and Foundation Moisture Intrusion and Water Leak Inspections, Troubled Building Consultations - Serving Chicago and Suburbs http://paragoninspects.com/
Michael Thomas is offline   Reply With Quote
Old 11-04-2010, 12:23 AM   #13
Member
 
Join Date: Aug 2010
Location: metro
Posts: 1,041
Default

Installing new attic insulation in old house


oh man i need to start my own attic thread!
federer is offline   Reply With Quote
Old 11-04-2010, 07:14 AM   #14
Retired from the grind
 
gregzoll's Avatar
 
Join Date: Dec 2006
Location: Midwest - Central Illinois
Posts: 14,023
Default

Installing new attic insulation in old house


Going back and looking at the pictures, it also appears that the exhaust from the dryer vents into the attic. That is not normal dust up there covering the cellulose.

gregzoll 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
AC Flex Duct - Suspend above attic insulation or lay it on top? fritzycat1 HVAC 13 08-17-2011 10:19 PM
Recently Topped Up Attic with Blown Insulation...Now I have Frost/Condensation earthad1 Building & Construction 81 02-18-2011 12:42 PM
Idea for attic insulation baffles. What are your thoughts? Ininkus Building & Construction 8 02-26-2009 12:46 PM
Attic Insulation - Do's and Don'ts reikiray HVAC 1 07-27-2007 10:21 AM
Is adding insulation in attic cost effective? AllGoNoShow Building & Construction 1 12-05-2006 11:31 AM




Top of Page | View New Posts

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