How Many Coats of Paint Do You Really Need?

The simple answer is two. The useful answer is that it depends on what is already on the wall, the colour you are going for and the paint you buy.

Why two is the standard

The first coat covers and bonds. The second evens out the colour, fills in thin patches and builds a uniform film. Two coats also give the paint the thickness it needs to be durable and washable.

A single coat can look fine in the tin lid and patchy on the wall once it dries and the light hits it from the side.

When one coat may do

Repainting a wall in a very similar colour, in good condition, with a high-quality paint. Even then, a second coat usually earns its keep.

“One coat” claims on tins are optimistic. They tend to apply to specific colours over specific bases, and a decorator will still apply two.

When you need three or more

Dark to light. Painting white over a deep red, navy or black often takes extra coats, or a tinted primer first.

Light to deep colour. Strong colours like deep green or terracotta can need three coats for an even, rich finish. Pigments in these shades are less opaque.

Bare or patched plaster. Needs a mist coat or primer before the two topcoats.

Stains. Require a stain-blocking primer, as we cover in our guide to water-stained ceilings.

Woodwork. Primer, undercoat and one or two topcoats are standard.

Paint quality changes the count

Cheaper paints contain less pigment and more filler, so they cover thinly. You may need an extra coat to get the same depth. A better paint can mean fewer coats, easier application and a finish that lasts. Over a few years, it is usually the cheaper option.

Technique matters too

Painting too thinly, rolling a dry roller and skipping the cutting in at edges all reduce coverage. Applying each coat evenly, in a consistent direction and finishing before the edge dries, gives a much better result.

Drying time between coats

Respect the tin’s guidance. Painting the second coat too soon can drag the first, leave marks and cause uneven sheen. In cold or damp conditions, allow longer. This is one reason a room takes more than a day, as we explain in how long it takes to paint a house.

Finish and coats

The glossier the finish, the more any weakness shows. See our guide to paint finishes before you commit.

A professional’s rule of thumb

Plan for two good coats, and let the wall tell you if it needs more. Our interior painters check coverage in raking light before leaving a room, because that is where any weak spot shows. Request a quote for your home.