The foam insulation and two layers of plywood can add as much as 2 inches of height to the garage floor.
How to raise garage floor.
Second and far more critical is when the garage floor has begun to tilt backward toward the house.
This can be a problem if the garage will continue to be used to store vehicles since it leaves you with a substantially raised lip at the doorway to the garage.
Plywood gusset to both sides of studs that occur at every 4 ft.
I want the new space to be at same level as the existing main house floor.
First the floor may be so out of level that the garage floor does not meet the bottom edge of the door.
If there is a dampness problem tackle this first with poly or other liners.
Normally garage floors are about 8 inches below the general house level.
How to raise garage floor for living space.
From the garage floor.
Along the ledgers.
My plan is to run a 2x12 stringer around the entire perimeter of the garage and to then run joists across the span.
Once the ledgers are up drive three double headed 16d form nails through the ledgers into each stud.
Then nail a triangular 3 4 in.
The garage is an old structure 1946 made from cinderblock walls on a concrete floor.
I am planning on converting my garage into a master bedroom with master bath.
You can correct this issue by raising the garage floor to meet your house.
Dealing with the edges.
However an out of kilter garage floor may require leveling when two critical scenarios happen.
The garage conversion requires the floor to be raised to match the house so first job is to build a suspended floor.
Raising garage floor 2 feet.
Garage floors are normally of almost the same level as driveways and there is every chance the dampness from surrounding areas could get into your garage.
Long 2 8 ledgers to the northeast and southeast walls about 2 ft.
Unfortunately your garage floor may not be level with the floor of your household creating a possible tripping hazard.
I need to raise the floor about 2 feet.
Adding 5 or 6 inches of concrete to your existing garage floor should be just fine if the existing concrete floor is in good condition meaning it hasn t settled drastically or heaved from freeze thaw cycles.
When converting a garage space into a living area installing a framed wood floor offers an opportunity to add insulation from the cold concrete slab access for electrical circuits to any interior walls being planned and effectively provides a level floor platform over a standard garage floor that can be sloped 4 to 5 inches from front to back.