Preparing the Floor Levelling

To ensure a smooth installation, it is important to prepare the surface onto which you’ll be laying your floor.

The most important thing is to have a dry, even and clean subfloor. If the floor is uneven (tile joints, parquet bevels or any type of cracks), think about using a levelling compound. Remember, vinyl is a soft flooring and any bumps underneath will show.

The floor should be stable before applying a self-levelling compound. With concrete floors, this is hardly an issue, but with wooden subfloors, the task may be almost impossible to handle. If a wooden subfloor moves when you step on it, a self-level compound might not be the best decision: it will break. Furthermore, the floor needs to be cleaned from dust and dirt before applying a self-levelling compound.

Before placing the self-levelling compound, it is essential to apply a brush or two of primer. This way, you will ensure a solid bond for the self-levelling compound. You have to wait until the primer dries very well because if wet, it may react with the self-levelling compound and make it less stable. As part of the process, air the room after applying the primer and you will speed up drying and eliminate unpleasant smells.
You can slide a framing square over the floor and find if it has any cavities. Mark these spots: they will be the ones where the self-levelling compound will be applied.
It is important to work fast because the self-levelling compound dries very fast. The whole process of pouring, mixing and spreading the compound should take no more than 20 minutes. The manufacturer’s guide should be followed. It is recommended to work with gloves and to avoid breathing the dust from the self-levelling compound: it may lead to cough or even allergies. For best results, you should mix the compound with a drill and add as much water as specified in the instructions. It is better to use cold water, thus lengthening the period before the compound dries up.
Immediately after mixing the compound, you need to spread it to the previously identified uneven areas. Wait a little until it begins to thicken and then use a drywall tool to make it even. Then you can spread it out to the whole room and ensure that the floor is even. It is important to know what you are doing and to do it quick. When the compound begins to thicken, you shouldn’t try to slow down the process by heating it up or by adding additional water. It will spoil the self-levelling compound and make it break afterward. In 4 hours, the compound will be hard enough to step on it.