Painting - Painting

I have just painted my bedroom walls. They had been painted once before a few years back. I used semi-gloss paint and now you barely have to let something touch up against the wall and the paint comes right off??? Should i have primed the wall first? Is there anything i can do to the wall now except do touch ups? I am moving on to my daughters room with the same problem i think...help...

If the paint comes right off as you describe, it never bonded to the surface. You are likely looking at scraping off all the failed paint, washing, priming and painting again. Was the room at the proper temperature when you painted?

Ya, the paint should have bonded and cured, how long ago did you apply the paint? What brand of paint did you use? Do you know what type of paint was on the wall previously? Was the wall fairly clean before you painted? If you cleaned the walls, what with? was it rinsed properly? As noted, cold temperatures can affect the paint's ability to dry and cure properly.

btw - welcome to the forums!

I used to live in Bithlo :D

You should prime semi gloss walls with a "bonding primer" made for glossy paint.

You may be OK in your situation (you still should have primed), you will need to let the paint cure (give it 30 days) to know for sure.

Latex paints develop adhesion as they cure. Until sufficient cure has taken place, they are soft and subject to gouging.

If your daughter's room is glossy, prime it first with a good bonding primer. It is better to use a solvent primer (oil or pigmented shellac) so that you don't run into the gouging issue. Use good ventilation during and after priming with these types of primers as they have strong odor. If you must use a latex primer, XIM UMA primer is a good waterbased bonding primer, but it will be subject to gouging for a couple of weeks until it develops sufficient cure.

If your house was built after 1978 (the year lead paint was banned), you can sand the walls first, then prime. This will help prevent gouging during the paint curing interval. If you sand thorough enough, you won't need a primer (as a rule).

If the house was built before 1978 - don't sand. Just be sure the walls are clean, then dry, before priming with the bonding primer.

Be sure to remove any sanding dust before priming or painting. Use a micro fiber tack rag or vacuum the walls with a HEPA filtered vacuum.

Thank you for the info.....

I have just painted my bedroom walls. They had been painted once before a few years back. I used semi-gloss paint and now you barely have to let something touch up against the wall and the paint comes right off??? Should i have primed the wall first? Is there anything i can do to the wall now except do touch ups? I am moving on to my daughters room with the same problem i think...help...
yes you should prime first with kilz 2 and then paint and i would just try a sample in the bedroom you did first and then paint and check to see how well it bonds,******************