Garage Insulation - Insulation - DIY Chatroom Home Improvement Forum


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

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

Reply
 
Thread Tools Display Modes
Old 01-29-2014, 01:14 PM   #1
Member
 
Join Date: Nov 2013
Location: Grand Rapids, MI
Posts: 62
Rewards Points: 59
Default

Garage insulation


I have an uninsulated attached garage. The garage door is somewhat insulated with some sort of foam core. I know what kind of insulation I want to add to the walls but the bigger question is what to do with the ceiling. There is no ceiling, just the roof trusses. I am looking for a low cost "ceiling" idea. Aesthetics are not much of a concern. I just want some way to suspend some insulation at the base of the trusses.
My current idea is to add some blocking 2x4s between trusses and put foam board on top of that. Then, possibly, fiberglass batts or blown insulation on top of that.
I don't want to heat the garage all the time. Mostly want it insulated so it is slow to freeze in the winter with occasional use of a propane space heater when I need to work on something.

Advertisement

chiraldude is offline   Reply With Quote
Old 01-29-2014, 02:58 PM   #2
Exterior Construction
 
Windows on Wash's Avatar
 
Join Date: Aug 2011
Location: Washington DC Metro Area (VA, MD, DC)
Posts: 7,129
Rewards Points: 3,292
Default

Garage insulation


I wouldn't both with the low cost option.

Putting up drywall isn't that much more expensive and it will be the proper way to do it.

Stapling some sort of housewrap or plastic up is not advisable nor is leaving the fiberglass exposed.

If you drywall it, you can blow in loose fill and actually have it work for you to help insulate the garage so the temps are palatable.

Advertisement

Windows on Wash is offline   Reply With Quote
The Following User Says Thank You to Windows on Wash For This Useful Post:
joecaption (01-29-2014)
Old 01-29-2014, 06:01 PM   #3
Member
 
Join Date: Nov 2011
Location: Hartfield VA
Posts: 27,782
Rewards Points: 680
Default

Garage insulation


Both foam, paper face fiberglass and your local codes will state it can not be left exposed.
In fact there was suppose to be 5/8 fire code drywall all the way from the foundation to the roof air sealing off the garage from the house.
Rent a drywall lift and install 5/8 fire code to the ceiling and insulate with blown in as suggested after adding baffles to keep from blocking off the air flow from the soffits to the roof venting, all openings where wires or plumbing was run must be sealed with fire rated caulking or foam.
__________________
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 01-30-2014, 09:49 AM   #4
Member
 
Join Date: Nov 2013
Location: Grand Rapids, MI
Posts: 62
Rewards Points: 59
Default

Garage insulation


I thought about drywall initially but I don't think the structure could support that much weight. The trusses are 3' on center which seems barely adequate as it is.
As far as fire rating goes, the exterior walls are covered by 1/8" wood paneling so there wouldn't be any point in making the ceiling fire resistant.

The wall connecting with livings space is finished with 5/8 drywall all the way up to the roof deck so there is a good fire barrier where it counts. Apparently the garage was considered an expendable afterthought 30 years ago.
chiraldude is offline   Reply With Quote
Old 01-30-2014, 11:33 AM   #5
Exterior Construction
 
Windows on Wash's Avatar
 
Join Date: Aug 2011
Location: Washington DC Metro Area (VA, MD, DC)
Posts: 7,129
Rewards Points: 3,292
Default

Garage insulation


Put some purlins or strapping across the underside to bridge the added span.
Windows on Wash is offline   Reply With Quote
Old 01-31-2014, 08:47 PM   #6
Registered User
 
Join Date: Mar 2009
Posts: 9,993
Rewards Points: 2,052
Default

Garage insulation


Sounds like rafters at 3' apart..... strapping may be too much weight with insulation and some covering, picture would help... http://www.diychatroom.com/f98/

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
Old 02-03-2014, 06:55 AM   #7
Member
 
Join Date: Nov 2013
Location: Grand Rapids, MI
Posts: 62
Rewards Points: 59
Default

Garage insulation


I measured and the trusses are actually 4' apart. Now I am more concerned about whether I need to add more structural support. I didn't see any obvious sagging but, just to be safe, I shoveled the snow off the roof. It was 2 feet deep on the downwind side so if it was holding that, it must not be too bad.
But, I have notice that the 2x4s are nailed with framing nails. I don't see any nail plates and there a number of places where someone has nailed pieces of plywood over the connections for reinforcement. At the very least I will want to do some serious reinforcement of what is there but I think adding a few extras trusses will have to happen before I get to the insulation.
chiraldude is offline   Reply With Quote
Old 02-03-2014, 11:34 AM   #8
Newbie
 
Join Date: Feb 2014
Posts: 12
Rewards Points: 10
Default

Garage insulation


The drywall is the way to go. But blown insolation is messy and if you use the attic for storage every time you go up it is dusty. My suggestion is use fiberglass roll insulation and staple it up to the roof rafter then drywall. Leave room for access if you do use it for storage. The project will cost a little more then using blown in insolation but you be happier with the job. ONLY IF YOU USE IT FOR STORAGE. If not use the blown in insolation.

Reading the rest of the remarks that you and others have made. Trusses are to be 24" on center 48" sounds like someone didn't follow code, and is not structurally sound. With a heavy snow year it is very posable the roof could cave in.

Advertisement


Last edited by dusty247; 02-03-2014 at 11:43 AM.
dusty247 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
Garage insulation.. sh40674 Insulation 4 01-09-2014 10:38 AM
Finishing the garage with insulation and drywall. Snapper12 Insulation 2 10-24-2012 07:14 AM
Garage ceiling insulation MNHouseRepair Insulation 16 12-05-2011 03:57 PM
Garage Door Insulation PaliBob Building & Construction 4 03-27-2009 04:05 PM
Insulation questions for new detached garage mpt1123 Building & Construction 2 03-01-2009 09:18 AM




Top of Page | View New Posts