Spraying vs rolling paint on new wood?


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Old 06-16-23, 09:00 PM
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Spraying vs rolling paint on new wood?

I知 a novice painter and I have a project to prime and paint about 100 pieces of exterior trim on my house.
I知 using Sherwin Williams A-100 Alkyd primer and Sherwin Williams Emerald Urethane Enamel paint on new Douglas Fir trim boards. I知 painting the boards before installing them by laying flat on some 2 x 4痴 on saw horses
I have access to a professional grade Graco airless sprayer vs rolling the primer and paint.

Question is: will rolling or spraying give better adhesion of the primer to bare wood and paint to primer?

If I spray, is it worth it to back roll after spraying? I want to do this project with the most lasting results.

Thank you.
 
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Old 06-16-23, 11:25 PM
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How you apply the paint, spray or roller makes no difference, what you get are just different finishes.
 
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Old 06-17-23, 02:24 AM
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Spray only just puts the coating on top of the surface while brushing or rolling helps to work it into the grain a little. That is one of the reasons back rolling is recommended. I often spray the primer and brush/roll the finish [or spray and back roll] Whether or not it's worth it to spray depends on how much you have to do along with what steps are needed to take care of over spray. Brushing/rolling generally gives a longer lasting finish over wood than just spraying.
 

Last edited by marksr; 06-18-23 at 03:07 AM.
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Old 06-17-23, 10:17 AM
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Thanks marksr, I was surprised when the salesperson at Sherwin told me the same, but it kinda makes sense I guess. Certainly not what I wanted to hear lol. I had a feeling this might start a debate amongst the experts.

Thanks again
 
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Old 06-18-23, 08:40 PM
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so I went ahead and rolled the primer (SW A-100 alkyd primer) and letting it dry overnight.
My paint is SW Emerald Urethane Trim Enamel.
Is it equally important to back roll both coats of the Emerald top coats? I like the quality of the finish with the sprayer, but don稚 want to compromise adhesion or durability. That is my most important factor here.

Thanks again.
 

Last edited by mchristo; 06-18-23 at 08:43 PM. Reason: Shortening the post
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Old 06-19-23, 02:29 AM
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The main thing is for at least one of the coats [primer or finish] be rolled. Rolling the primer and first coat of finish and spraying the final coat is a good plan.
 
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