Blow either loose fill cellulose or spray foam into walls from the outside with.
Insulating garage walls after drywall.
You can also add insulation to existing walls without removing drywall by cutting holes in the exterior siding.
Fiberglass or mineral wool insulation blowers are available from many building supply stores that sell insulation and they may give a discount if you buy the insulation from them.
If you live in a colder climate installing drywall over insulation can keep your garage above freezing in the winter which helps keep your pipes from freezing.
If an uninsulated wall already has drywall up you can use blown insulation.
Consider renting a residential dumpster to toss it away.
Ultimately there are so many compromising elements that insulating the exterior walls are not particularly effective.
Insulate and air seal the garage ceiling and interior walls and your house will be warm and comfortable during the winter.
How to insulate a garage step by step.
Here s my step by step process for how i added insulation to my garage.
The preferred method is to cut holes between each stud and use an insulation blower to fill the wall with loose insulation.
If you didn t do that before you put the frame up you can still do it now although it s going to be.
How to insulate a garage wall in four easy steps step 1.
I wrote a tutorial on how to waterproof and seal your garage walls using drylok.
A common technique is to cut and remove a band of drywall top and bottom.
In a perfect world you would be able to unscrew invisible bolts remove drywall panels install insulation and reinstall the panels our less than perfect world of permanently attached wallboard means time consuming hacking away of gypsum individually removing drywall screws or nails installing r 13 or greater fiberglass roll insulation and re installing the drywall.
If your garage has drywall remove it.
Make sure to clear up any dirt and clear out the stud cavities.
In warmer climates like florida where i live insulation and drywall help keep the hot air outside where it belongs.
Insulating the garage ceiling insulating garages is a challenging home project.
Insulating a finished wall is a lot more complicated but it might be worth it if your walls have no internal insulation and your heating bills are through the roof.
Either way your garage is more comfortable to work in.