My company is building an addition that called for plaster walls and ceilings. The work was completed about three months ago. The painters recently applied two coats of latex based paint to the surfaces. They are currently working on the trim. We have started to notice "veining" and "alligatoring" of the wall and ceiling surfaces. It appears that this is occurring under the paint. There is no chaulking and the surfaces are solid. The addition has been heated and air conditioned. Neither our painter or the plasterer has experienced this problem before(of course!). I would greatly appreciate any input someone out there may have.