How Many Coats of Polyurethane Do You Need for Hardwood Floors?

Oil and water-based polyurethane are the two basic types of polyurethane available. You may find other variations, such as latex or oil-modified polyurethane. However, the main difference is in the color of the finish. In this article, we will deal with the pros and cons of the two basic types.

One of the best things about a water-based polyurethane finish is that it dries in just a couple of hours. Also, water-based polyurethane is almost odor free. The recommended number of coats is 4, so if you start re-coating early in the morning, you might be able to finish in one day. However, if the area is too big this might not be possible.

Even though water-based polyurethane finishes are more eco-friendly, they tend to be less durable than oil-based ones. Water-based polyurethane can also be more expensive.

Oil-based polyurethane is very tough and dense. This affects how many coats of polyurethane are required for hardwood floors. If your floor isn’t too old or damaged, applying just two coats might be enough. Also, it is easier to apply and less temperamental when you work with different types of wood. Usually, it is less expensive than the water-based variety.

The drying time is notoriously long. It may take between 8 to 10 hours before one coat completely dries. Due to this and the strong odor, you need to stay away from the room until it dries.

Unlike water-based polyurethane, oil-based polyurethane turns yellow as it ages. However, this is not a disadvantage to some people because they like the patina.

If you are applying the coats yourself, there are some things you should avoid. These tips may speed up the recoating process and allow you to use fewer coats to get the same result.

1. Applying oil-based polyurethane over a water-based bottom layer can be difficult. The recommendation is to not try it at all. On the other hand, you can apply water-based polyurethane over oil-based polyurethane.
2. Make sure the floors are properly sanded and cleaned before applying each new coat.
3. Protect yourself from the urethane fumes. The room should be airy, so you can use a fan if needed. Respirators are recommended regardless of whether you use water- or oil-based polyurethane.
4. Remember to always carefully sand down the dried coat before applying another one.

The condition of your floor will determine how many coats of polyurethane you need to apply for hardwood floors. However, it usually shouldn’t be more than four.