Using the long 2x4 and the 4 foot level you should be able to find the high spots and the low spots on your floor.
Add 2x4 to level floor.
Fill the low spots or dips with the concrete leveling compound before addressing the hills.
This room looked crazy.
When a joist deflects its bottom edge stretches slightly.
There are probably as many ways to level a floor as there are out of level floors being leveled by someone so here s matt jackson s take on making precise extra long shims.
Figure out how much taper you ll need.
For this method to work the 2x4 must be long enough to run the full length of the joist.
Once the concrete fill has dried place the 2x4 back on the floor to ensure you ve created a relatively level concrete subfloor.
And add another row of perpendicular blocking 12 out to minimize any future sagging.
Whereby new joists are attached to the existing joists to add strength to the floor.
Often filling the dips will also help in reducing the bumps.
The process of fixing both an out of level and an out of plane floor is simply known as leveling a floor.
I jacked up the h.
Sister a 2x4 or scribe a 2 x on top.
Level these out with a putty knife.
So you can level the remainder of the 3 x s much simpler than your pic.
Adding a 2x4 to the underside helps keep it from doing this.
If the floor is uneven lift up the board until it is level so you ll know how much flooring compound you ll need to even it out.
There are many ways to do it but you can always start by using a 4 foot level.
If the area is very large use a long straight 2 in 4 in 5 1 cm 10 2 cm board and set your level on top of it.
The builders forgot some load points in this house along with some really bad crowned joists.
Tom bonds the two together with construction adhesive and sinks a 12d nail up through the 2x4 every 8 to 12 inches.
Since your room is 12 x 12 it would also be useful to have a straight 2x4 that is 11 10 long.
Step by step process for cutting a six foot ling shim from a 2x4.
Find a straight board.
Floors are rarely perfectly level.