Most homes in Lower Bucks County and the greater Philadelphia and New Jersey area need exterior painting every seven to ten years, sometimes sooner. Hot, humid summers and freezing winters make paint expand, crack and peel, especially on older colonials, twins and rowhomes in Levittown, Langhorne, Havertown and Norristown. You will want to call a painter when you see peeling or bubbling paint, chalky siding, faded color, bare wood on trim, or gaps around windows and doors. Many homeowners in New Hope, Doylestown, Lambertville and Ambler also repaint before listing a home, since fresh paint is one of the quickest ways to add value and make a strong first impression.