The paint on my walls are 10 years .do i need to prime before repainting the same color?

can i paint only that one coat over the primer? they are interior walls of living room , kitchen and bathroom. i also scrubbed with tsp.The paint on my walls are 10 years .do i need to prime before repainting the same color?
I have to agree with some and disagree with others. Your walls are clean from contaminants most likely now that you have washed with the TSP solution. Primer is used mainly for two reasons, to aid the new paint in adhering to the surface to be painted and to block problems that could affect the top coat. If you have neither then I would forgo the primer. That being said, as was mentioned, your walls may soak up some paint. Some cases for that being the case(not just being 10 yr. old): If it is a ten yr. old house with just the original paint job, the sheetrock may still be somewhat porous due to having very little or very cheap paint on the walls. Low grade flat paint was used and didn't seal the surface very well, etc. I agree with the first guy, two coats will make a huge difference in the appearance of the job and is worth the extra effort and if it is any consolation, the second coat is much easier and quicker to do. Also, I would consider using a satin/eggshell finish, especially in the kitchen/bath areas.The paint on my walls are 10 years .do i need to prime before repainting the same color?
As long as you remember what type of paint you used 10 yrs ago (latex, acrylic, oil base) and you use the same type again, you need NOT prime. As for the one coat... I'm a painter %26amp; I have never been happy with just one single coat... My philosophy: If your gonna do it, might as well do it right the 1st time ... take the small effort %26amp; throw a second coat on -- it goes really quick! If your not sure, let it dry completely %26amp; stand back %26amp; take a good look at it, then decide if you want another coat or not.
I have to disagree with the painter of 25+ years.





Walls that haven't been painted in 10 years are going to suck up paint


like crazy.





Use the primer and save yourself from buying more paint that may or may not match the first cans you had mixed.
when u scrubbed with TSP, did u do any damage to the drywall? If not, one coat should cover. No priming needed.
there's also paint with primer built in