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Why did I fail at painting?

R

rikadik

Senior member
Last summer my dad built a greenhouse and I painted it for him. Unfortunately, a year on, pretty much all the paint is peeling off so I've offered to do it again. Where did I go wrong?

I was painting on to a wood frame (not sure what type), I used a coat of primer, two undercoats and a coat of gloss. It looked beautiful when it was finished but has now fallen to pieces!

Any tips this time round?

Cheers
 
What kind of paint did you use? I knew a guy who used interior latex on the outside of his house. He wasn't paying attention, I guess. He was not happy a few weeks later when it all started coming off in the rain.
 
Well I didn't sand it all so that may be something to do with it.

The greenhouse in question is in North Wales, UK. Definitely used outdoor paint. It was very hot when the paint went on come to think of it, and its been a pretty miserable rainy winter. Even so, I would have thought it would survive better than it did.
 
Did you paint the greenhouse right away or did you wait for the new wood to dry for about 30 days?

Surface prep is important as is good quality paint. Also avoid painting in really hot day. Paint tend to bubble. Did you use oil or latex paint? Also is there excess humidity escaping from the greenhouse? This matters more with oil than water based latex but it's also a factor.
 
Originally posted by: Naustica
Did you paint the greenhouse right away or did you wait for the new wood to dry for about 30 days?
Click to expand...

Sounds like the wood was "green"/ not cured out.

As far as I can tell you took the correct steps in the painting process but maybe the actual wood itself has rejected the paint.

I am sure if you scrape the old paint off and primer/paint it again you will be good to go.

Jeff
 
If you want paint to stick for a longtime, You need to use a primer.

Also depending on the temperature and the humidity it'll be exposed to, you should use a specific type of paint..

**edit**

nvm, didn't read the thing completely through, maybe you should use a different type of paint ?

 
Well thanks for the input everyone. I'll give it a good sanding and research the paint I'm using more carefully. I'll also get the wood as dry as I can before painting it, but not on a really hot day in summer. Fingers crossed, second time lucky!
 
Originally posted by: rikadik
Well thanks for the input everyone. I'll give it a good sanding and research the paint I'm using more carefully. I'll also get the wood as dry as I can before painting it, but not on a really hot day in summer. Fingers crossed, second time lucky!
Click to expand...

You should be good to go this time. Just use a power sander to sand the flaky paint. Since the wood has cured, you shouldn't have any problem now. You really don't even have to use primer this time. Just double coat everything and you'll be good to go. Primer is nothing more than paint.
 
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