Plaster walls in Chicago's greystones, bungalows, and pre-war 2-flats need different prep than drywall. Here is how to paint them so the finish lasts.
Many of Chicago's most charming buildings — Logan Square greystones, Andersonville bungalows, Lincoln Park 2-flats, and pre-war courtyard buildings in Lakeview — were built with plaster walls, not drywall. Plaster is a layered system: wood lath or rock lath covered with two or three coats of lime or gypsum plaster. It is harder than drywall, more porous, sometimes alkaline, and almost always at least 70 years old.
That changes everything about how paint adheres, how cracks form, and how moisture interacts with the wall. Property owners who treat plaster like drywall end up with peeling paint, bleeding stains, and finishes that fail within a season. Whether you manage a single Bucktown 2-flat or a portfolio of pre-war Hyde Park condos, painting plaster correctly starts with understanding what you are painting on.
Walk every room before you buy a single gallon of paint. Push gently on suspicious spots — solid plaster feels like a hard plate; failing plaster has a hollow give and the lath has separated from the keys behind it. Look for hairline cracks (cosmetic), wider cracks that follow joist lines (settlement), and stained spots that bloom around the edges (active or historical moisture). In a typical Ravenswood greystone, you will find a mix of all three.
Take photos and tag the worst sections — those need repair, not just paint. If you see large bulges, soft patches, or crumbling plaster around windows or radiators, hold the paint job until you have addressed the underlying cause: a leaking gutter, a failed parapet, or a vintage radiator valve that has been weeping for years.
Hairline cracks open and close with seasonal humidity, so a thin skim coat of joint compound combined with flexible mesh tape will outlast a rigid filler. For larger cracks and holes, use a setting-type compound — the kind that mixes with water and hardens through chemistry, not air-drying. It bonds better to old plaster and will not sag.
Loose sections need to be re-anchored to the lath; plaster washers paired with drywall screws are the standard fix in Chicago restoration work and will save sections of original plaster that would otherwise be torn out. In Lakeview and Andersonville buildings where ceiling plaster has separated from the lath, address it before painting. A fresh coat of paint will not hold up a sagging ceiling.
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