You must apply the right number of latex paint coats to get proper coverage and a smooth finish. So, how many coats do you need?
You need to apply 2-3 coats of latex paint. Latex paint contains plastic resins and synthetic latex, which makes the paint thicker than most water-based paints.
For low-traffic surfaces, apply 1-2 coats, while for high-traffic surfaces, apply 3. Latex paint isn’t durable, so you must seal it with a sealant for high-traffic surfaces.
Why Does it Matter?
The number of coats matters because it determines the durability and color shade of the finish. If you don’t apply enough coats, the finish will have a lighter color shade. That’s because there will be fewer paint pigments on the surface, leading to a light (low vibration) finish.
If you don’t apply enough coats, the finish will be weak and have poor coverage. A weak finish will get washed off if exposed to minimal contact or water. The minimum number of coats is 1.
If you apply too many coats, the finish will remain wet and sticky for a few days. That’s because too many coats will reduce the evaporation rate, meaning it will take longer for the solvent to evaporate. This leads to a sticky finish.
Too many coats will lead to a cracked finish because the paint won’t be able to penetrate the surface. If the wood pores are full, the remaining paint will stay over the top layer and dry. The paint on the top layer will have a weak bonding with the surface and will crack, peel off, or break with minimal contact.
Apply Another Coat if:
To know if you need another coating, inspect the finish and color shade. For example, apply more coats if the color shade is lighter than on the container. On the other hand, if the shade is the same as the container, you don’t need more coats.
If the finish has patches or unpainted spots, apply more coats. That’s because the finish has poor coverage, and you must apply more latex paint to cover the whole surface. If you don’t, the finish will be weak and look unprofessional.
The surface type will also determine the number of coats. Apply 3 coats of latex for high-traffic surfaces because it needs better coverage and protection. For low-traffic surfaces, apply 2 coats, as they don’t need much protection.
If you are painting non-porous materials, such as metal, you need fewer coats (1-2) because paint can’t penetrate these surfaces and will peel off if you apply too many. However, for porous materials, such as fresh wood, you can apply 3-4 coats because the paint will penetrate the material.
Latex Re-coat Dry Time
It takes latex paint 3 hours to dry enough for a re-coat. However, the dry time depends on the humidity levels, room temperature, and surface type. For instance, latex paint will take 2 times more to dry during humid conditions than usual.
If you re-coat too soon, the finish will turn sticky and might peel off. That’s because you will trap the existing coat solvent by applying another coating over it. Since the solvent can’t evaporate, the finish will remain wet and sticky for several days.
Though 2-3 coats of latex paint are needed, you can’t apply all the needed coats at once – you need to wait for each coat to dry and harden properly before applying the next one. However, you must wait 24 hours for the latex paint to dry fully before sealing it with a sealant.
- Wood – For wooden surfaces, you need 2 coats of latex paint. On wood decor surfaces, you can apply one coat only. If the surface is exposed to traffic or water, you must seal it with spar varnish or polyurethane.
- Furniture – You only need 2 coats of late paint on the furniture. This will give you a vibrant finish and proper wood protection.
- Cabinets – For cabinets, you need two coats. However, you must seal the paint with a waterproof sealant so it doesn’t get washed off by water.
- Tabletop – On a tabletop, you need 2 coats. But, you must seal the finish to protect it from scratches, pencil marks, and food and water spills. If you don’t, the finish will get dirty, and you must clean it more often. The more you clean unsealed paint, the faster it will get washed off.
- Non-porous Surfaces – You need one coat of latex paint for non-porous surfaces, such as plastic or metal. That’s because non-porous surfaces don’t allow penetration, so the paint will have weak adhesion.
Different Types of Latex Paint:
- Exterior Latex – You need 3 coats of exterior latex paint. That’s because the paint will be used outdoors and needs enough coats to withstand weather elements, such as rain, dust, and moisture.
- Enamel Latex – Since enamel latex paint is thicker than most paints, you only need 2 coats of it.
- Behr Latex – You need 2 coats of Behr latex paint. Behr is a paint brand, and you must follow the Behr manufacturer’s instructions to know how much paint you need.
- Sherwin Williams Latex – Sherwin Williams latex paint offers impressive coverage and durability, so you only need 1-2 coats of it.
- Semi-Gloss Latex – For semi-gloss latex paint, you need 2 coats because this paint contains a higher volume of a sheen. This makes the finish thicker and stronger, so you don’t need too many coats.
In summary, you need 2-3 coats of latex paint for proper coverage and durability. However, the number of coats depends on the surface type. For low-traffic surfaces, you need 2 coats, while for high-traffic surfaces, you need 3 coats of latex.
Tony is a professional painter and an author of DIY Geeks. Tony has completed over 1,000 painting projects for his clients. It's safe to say he knows what he Is talking about,