Recognize and Avoid Lap Marks

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Keeping A Wet Edge While Rolling A Wall. Proper Paint Rolling. How to roll a wall.

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What happens here

Chris explains that while the current coat might not be the final one (requiring two coats for full coverage), maintaining a wet edge is still crucial. He warns that if you fail to keep the paint wet enough or apply it too thinly, it won't flow together, resulting in 'stripe and lap marks' on the wall. Furthermore, he points out that a dry roller nap can actually start pulling paint *off* the wall. The key is to keep both the wall and the roller's nap saturated with paint, ensuring the paint can dry evenly and 'gel together' for a smooth, uniform finish.

Goal: Ensure paint dries evenly without lap marks.

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coats to cover this wall. So, our wet edge is not as critical. But if you don't keep a wet edge and put enough paint on the walls to get it to flow together, it'll leave stripe and lap marks on the wall. So, you want to just keep loading your nap, keeping the wall and nap saturated with paint. The paint should never begin to run out of paint. The nap shouldn't. And if the nap runs out of paint, it'll actually start pulling it back off the wall. So, keep loading it. You can see how many time I'm loading this nap, running down this wall, keeping the nap saturated, And that's what keeping a wet edge is. If you don't keep a wet edge and keep your edge, your trailing edge completely saturated, the paint won't flow together, won't gel out, and you'll actually get lap marks or stripe marks up and down your walls. So, it's important to keep a wet edge.

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