My Garage is about 21' x 21' with 8' ceiling. The garage door is a double door 16' wide, metal, composed of four sections, each section made of 4 panels.
All walls and ceiling are finished sheetrock.
The garage door was insulated with ultratouch denim (NOT their radiant barrier product). The walls and ceiling were insulated with blown in Celbar insulation. Ceiling was R38 (10.6" thick). Walls were blown until packed. The technique for wall was to drill three 1" holes (near bottom, center, and near top) for each space between the studs and blow in the insulation through these holes. After the insulation was installed, the holes were patched. I pulled up my attic flooring ahead of time because I wanted to re-do it anyway. If it had been left in place, they would have drilled holes or blown in through the ends of the spaces, as appropriate.
An experienced insulator will know how to handle various situations.
Our cost (labor and materials)
Garage door: $499
Attic: $375
Walls: $625
All the work was done simultaneously. I believe there was a $600 or $700 minimum job size which I obviously exceeded.
I think the radiant barrier has to be installed so it makes tight air spaces in your door to be effective as an insulator. That is a bit tricky. That is why I went with the insulation instead. The installer said the insulation worked very well for all seasons, including the hot summer for our Houston area. I have found it to be quite effective.
Bob
From: DoIt_Yourself@yahoogroups.com [mailto:DoIt_Yourself@yahoogroups.com] On Behalf Of Jan Flood
Sent: Wednesday, November 21, 2012 5:15 PM
To: DoIt_Yourself@yahoogroups.com
Subject: Re: [DIY] Insulate garage door
Bob, this is something we really need to do with our garage. Would you mind sharing the size of your garage and the cost to do this? Our house is extremely well insulated and the garage is completely finished so can't imagine why they didn't insulate it during construction. The side walls are concrete about 36" up with 2x4 and sheetrock the rest of the way. Ceiling is at least 10', maybe 12'. Two walls back to the house - one wall to the outside and the metal roll-up doors make up the 4th side. There is blown in insulation in the attic over a portion of the garage ceiling - but none in the area where an attic floor was put in. Would not want to remove the sheetrock so have thought the blown in stuff would be the best method for the one exterior wall. The Ultra-touch Radiant Barrier has good reviews and looks like it might work for our garage doors. Need to take a trip to Home Depot and talk to them.
On Nov 15, 2012, at 5:34 AM, bob@wrobertdavis.com wrote:
I just had my attached garage insulated. This included all the walls, the attic, and the garage door. I did this to be able to efficiently air condition and heat the garage for use as a part time hobby and woodworking shop. I live near Houston, Texas so my primary concern was air conditioning.
I used a commercial insulation company. They installed a product called Ultratouch denim insulation in the door panels. It is held in place with metal bands that are attached to my garage door with sheet metal screws.
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