Primer is the first line item owners cut and the one that decides whether a paint job lasts two years or eight. Here is how to match the right primer to every surface in a Chicago rental.
Primer is usually the first thing a property owner tries to cut when a painting quote comes back higher than expected. It is also the line item that decides whether the job lasts two years or eight.
Primer does three things finish paint cannot do well. It seals porous surfaces so the topcoat does not soak in unevenly. It blocks stains from bleeding through. And it creates a bond on surfaces that paint would otherwise peel right off of. Skip it and the failure rarely shows up on day one. It shows up in month eight, when a hallway in Logan Square flashes patchy sheen, or when repainted cabinets in a Lakeview two-flat start shedding along the door edges.
Primer is not one product, though, and choosing the wrong type is nearly as costly as skipping it.
Any bare drywall or fresh joint compound needs a dedicated drywall primer-sealer, usually a PVA-based product.
Drywall paper and dried mud absorb paint at different rates. Roll finish paint straight onto a patched wall and the patched spots drink it in, dry flat, and telegraph through as dull blotches. Painters call it flashing, and it is the single most common complaint after a rushed turnover repaint.
PVA primer is cheap and dries fast, which makes it easy to justify on a full-unit turnover in Rogers Park or Albany Park where a crew is filling dozens of anchor holes. One coat across the whole wall evens out the porosity so the finish coat lays down uniform.
One limitation: PVA seals, but it does not block stains and does not bond to glossy surfaces. It is a bare-drywall product and nothing more.
A large share of Chicago's pre-war stock has plaster walls, not drywall. Greystones in Humboldt Park, courtyard buildings in Rogers Park, and brick two-flats across Avondale all behave differently under a roller.
Old plaster is often chalky, sometimes still curing where it has been patched, and frequently carries decades of calcimine or oil paint underneath. A water-based PVA primer on chalky plaster just sits on top of the dust and takes the topcoat down with it when it lets go.
For sound plaster, a quality acrylic bonding primer works fine. For chalky, powdery, or previously calcimine-coated plaster, an oil-based or shellac-based primer is the safer call because it penetrates and locks down the loose surface. Fresh plaster or a new skim coat needs a few weeks to cure, then an alkali-resistant primer, since uncured plaster is alkaline enough to burn through ordinary coatings.
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