Before you begin your floor tile installation, You may need to add the job of leveling a floor. Check to make sure your floor is level. You may need to use a self leveling compound.
You can tile over a slightly slanted floor, but if the floor has lots of hills and valleys, thinset alone won't do.
If you desire to use vinyl floor tiles or any other resilient tile, it is of major importance that the subfloor be smooth and level. Vinyl floor tiles as well as all other resilient tiles show all the imperfections found in the subfloor below.
Thank Goodness for self leveling floor compound. It will settle into a flat and level surface before it hardens.
Patching compound requires extensive troweling. It is hard to use for do it yourself tilers.
Self leveling material is a much smarter choice. Self leveling floor compound does not add strength to the subfloor, but it does add weight. This increases the importance of needing a strong tile underlayment.
Place your bubble level on the floor. If it shows that your bubble is not centered, the floor is not level. Lift the low end of the level until the bubble is centered. Measure the space between the level and the floor.
If you are using a 2 foot level, and measure a gap of more than 1/4 inch you will need to use these instructions for leveling a floor before your floor tile installation. Leveling For a 4 foot level's distance is 1/2 inch. When you are using an 8 foot level, anything more than 1 inch needs to be leveled.
keep repeating this process using your bubble level all around the floor, while moving the level in different directions, wherever the slope seems too steep.
Cut 2x4s to the length of your doorways. Tack the 2x4s to the floors of the doorways using drywall screws.
You can use either Duct tape, masking tape, or blue painters tape, to cover the seams where each 2x4 meets the subfloor. Use additional tape to seal gaps in the subfloor, to stop the compound from pouring through any holes.
Step 3-Prime the floor
To ensure good adhesion, most self leveling compounds require a latex primer to be applied to the floor. Apply it using a roller and brush. Allow it to dry for about 2 hours before you mix your compound.
Follow the package instructions for the amount of water to add to the self leveling compound. and use a mixing paddle loaded into a drill with a 1/2 inch shank, to combine your self leveling compound ingredients.
Gently pour some of the leveling compound onto the low spot of the floor. Use a flat trowel to push and pull the self leveling compound around the floor. Keep adding more compound as you back out of the room.
The self leveling compound will even itself out, and harden into a flat plane. It will be ready for your floor tile installation in about 12 hours. After hardening if you need to apply another coat of the self leveling compound, do a second one the next day.