Bubbling Paint On An Old Wall Could Be The Result Of The Wall Not Being Properly Cleaned Before Painting.

For example, did the wall ever have wall paper on it?

Many old houses were wallpapered at some point and the wallpaper was removed and the walls were repaired and painted.

But what if all the glue was not washed off? Today's latex paints or moisture from drywall mudding compound can react with the glue causing it to expand and giving you pealing paint or bubbling.

This video shows how to fix the problem.