A primer preps the painting surface and seals any stains so that the paint adheres well, and you'll get the smoothest, cleanest finish possible. Read on to find out why you should never skip priming before painting.

Is it necessary to prime before painting?

Always prime your walls before painting if the surface is porous. The surface is porous when it absorbs water, moisture, oil, odors or stains. ... This material will literally absorb your paint right into it if you don't prime first. Untreated or unstained wood is also very porous.

What happens if you don't use primer before painting?

If you skip priming, you risk peeling paint, especially in humid conditions. Moreover, the lack of adhesion could make cleaning more difficult months after the paint has dried. You may find the paint wearing off as you're trying to wipe off dirt or fingerprints.