Im having a paint issue in my house.
the water based latex house paint on the market today doesn't stick to the trim in my house. by doesn't stick, I mean painters tape will peel it off in large chunks. the only way paint will stick is to sand off the old paint.
my question is, what is the old paint? Ive lived here about 10 years, the house wasn't that dated and other than a couple spots I covered with pictures, the walls didn't "need" paint, but we are starting to make the rest of the house a bit more us.

 

Most likely the trim is painted with an oil based paint in a gloss finish.

 

^ yes true. I don't think you'd have lead based paint either but this can be an issue.

 

If the house was built prior to 1978, you may have a lead based paint issue......should not be a factor if post 1978 build date.

 

Rather than scraping and sanding,have you tried washing the old surface with real "TSP",=Trisodium Phosphate to remove the gloss and then paint over the old surface?Wear non permeable gloves!

 

non permeable gloves

That means rubber or latex for you folks from Oklahoma
No, no you don’t have to thank me its all just part of the service.


It could be that there is some oxidation of the old paint. Is this occurring only on the outside?

 

oil or enamel john, as above.. it isn't sticking due to the smooth surface below....

A. chemical coat/strip as above (lots of work navy man)
a simple wipe down with muriatic acid may get the gloss off but careful about the eys, nose with that stuff.

B. 220 grit sandpaper on the palm sander prior to any paint.

C. self etching enamel paint- very expensive but it is the coating used to cover seal damaged areas in government buildings...do dit dooo


paint it Navy grey with left over WW11 paint....

hard to find any paints now with toulene (think acid etching) but reading ingredients may be neccesary.....

where are your son-in laws???!!! heheheh

 

Gee thanks Bigfoot, I diden't know you were "into latex" you want maby I should say "DUuuuuuude"?

 

Personally, we always give any trim we work on a hand with sand paper(new or previously painted). Then it gets a coat of primer/sealer, then the finish coat.

 

yup, same here. have to protect the wood.

sorry fronty, i didn't check the poster- thought it was 04ctd....my navy pal, john.

but you DO have two sons....lol

 

Oh not into latex myself. The worst sound in the world IMHO is snap followed by the words “you will feel a little pressure”.
It’s just that I felt our friends to the north could use some assistance with the big words.
Back on subject the others most likely have got it right the surface is to smooth or as I mentioned before oxidized that you will need to ruff it up a little.

 

I was doing the exact thing a few months ago. The trim was painted (by me) with a water based gloss paint. I had to sand it with a 220 grit sand paper IIRC to get the new paint to stick and not peel up with the blue painters tape. A lot of extra work but the finish is perfect this way.

 

Sounds like you have a good excuse to go buy a sandblaster

 

Or put up new trim...

 

House was build in the early 70s and remodeled in the late 80s with an addition on the back.

will that affect the carpet.
The wife gripes enough about the sanding dust, I wouldn't even wanna fire off a sand blaster in the house.
Have you priced trim? Im cheaper than that....