You can insulate the walls ceiling and door of the garage to the highest r value possible but if you fail to fill those air gaps you ll still be wasting a lot of heat.
Insulating a concrete garage ceiling.
So before insulating go around the garage with a can of low expanding spray foam and seal all gaps and cracks that let in the daylight.
There are two main ways to insulate a concrete garage.
If there is no finished space insulate at the interior wall.
How to insulate a garage step by step.
And don t forget to take flooring into account.
Just remember to use thicker r 40 insulation.
Last chance to waterproof your wall.
If you didn t do that before you put the frame up you can still do it now although it s going to be.
The ceiling is concrete panels that lay over a steel beam in the center and on the foundation walls on the perimeter.
If you plan on using your garage for temporary activities like a mechanic or woodworking shop you would insulate both the interior and exterior walls.
This is part 1.
How to insulate a garage ceiling.
Insulating a concrete ceiling the space is under a garage that is part of the house.
It s about time i had a better work environment.
Fumes can seep in underneath the wall framing where the wood rests on the concrete or block foundation.
I wrote a tutorial on how to waterproof and seal your garage walls using drylok.
This will help while you re up on the ladder.
If there is an finished space over the garage insulate at the garage ceiling.
How to install insulation in garage ceiling for insulating your garage.
Here s my step by step process for how i added insulation to my garage.
Insulating the ceiling of your garage involves the same process as insulating the walls.
The second is to use a coated foam sheet like the ones manufactured by kingspan or celotex.
Measure the height and width between the framing in the ceiling and pre cut the pieces you ll need.
Run a bead of silicone caulk along the bottom of the wall between the wood and the concrete.
The first is to use a fibreglass insulation much like the type found in any typical loft.