Cut the 2 by 4 boards to match the wall height you wrote down in step 2.
Insulate concrete wall in garage.
Of unfaced expanded polystyrene r 15 that allows the foundation to dry inward and condition the space with air from inside the house.
Concrete is cold and hard but an insulated concrete slab can make a heated garage significantly warmer and more energy efficient.
Batt insulation is designed to fit snugly in between your studs as long as your studs are a standard width either 16 or 24.
And don t forget to take flooring into account.
The best way to insulate a slab is to isolate it from the ground.
Actually it needs to trap the cold air between the exterior wall and not let it through to your garage.
Make a mark on the wall every 4 feet.
Leave the floor above it uninsulated vapor seal the ground below with polyethylene and a thin concrete slab insulate the walls with a foam based insulation such as 4 in.
Its the same thing in principal.
Write the height on a piece of paper.
Consider all aspects of insulating your garage not just the walls but also the garage doors and the ceiling particularly if you plan to add a heating and or cooling system.
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.
For example while an epoxy coating will add a protective layer to the floor it won t necessarily add insulating values.
The insulation needs space to breathe.
The second is to use a coated foam sheet like the ones manufactured by kingspan or celotex.
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.
Your only option is to cover the inside of the exterior walls with a continuous layer of insulation as though you were insulating a basement wall.
For example if you have a 7 foot wall you ll need 6 foot 10 1 2 inch long studs.
And there is no effective way to fill the voids in an existing concrete block wall.
Cut 2 by 4 lumber to the height of your concrete wall minus 1 1 2 inches for a header and footer.
The first is to use a fibreglass insulation much like the type found in any typical loft.
Measure the height of the wall.
First mark the 2 by 4s according.