Preparation
How to Prepare Your Property for Interior Painting
Interior Painting Preparation | Homes, Offices and Commercial Interiors
The quality of an interior paint job is 80% preparation. Even the most expensive coating fails over dusty walls, cracked drywall, or glossy trim that was never sanded. This guide walks residential and commercial property owners through the exact prep sequence our crews follow before opening a single can of paint. Follow it, or ask your contractor to follow it, and you will end up with a finish that looks factory-fresh and lasts for years.
Moving and protecting furniture
Every piece of furniture in the room is either moved out or moved to the center and draped. Breathable canvas is the correct cover — plastic traps moisture and dust, and can leave marks on wood or upholstery. Small items are boxed and labeled by room. On commercial projects, workstations are draped nightly and unwrapped before the office reopens.
Floor protection
Rosin paper goes along every working wall, taped down at the edges to keep drops off finished floors. Canvas covers high-traffic paths from the front door to the room being painted. Tile grout is masked at the baseboard so no paint bleeds into it. Carpet is protected with plastic film only in short sections since long runs trap moisture underneath.
Wall cleaning and inspection
Walls in living areas rarely look dirty, but they carry cooking oils, hand oils, and dust that will keep new paint from bonding. We wipe walls with a diluted TSP substitute or a microfiber and warm water, especially near kitchens and light switches. During cleaning the crew inspects every wall for cracks, nail pops, and stains that need repair before priming.
Drywall repair and hole patching
Nail pops are set below the surface and spot-patched. Small holes are filled with lightweight spackle in two thin coats. Larger holes get a mesh patch or a drywall plug, taped, mudded, and sanded. Cracks from settlement are opened slightly, filled with a flexible spackling compound, and taped if they run more than a few inches. Our Drywall Repair & Painting service covers deeper repairs when the substrate is damaged.
Removing loose paint and glossy surfaces
Any loose paint is scraped back to a sound edge and feather-sanded. Glossy trim is sanded to a matte finish so new coats bond mechanically. Old oil paint on trim is spot-tested with an adhesion primer before recoating with waterborne enamel. Skipping this step is why so many trim projects peel within the first year.
Priming stains, patches, and problem areas
Water stains, marker, and nicotine are sealed with an oil- or shellac-based stain-blocking primer, not a standard latex primer. Patches are primed so the sheen matches the surrounding wall (unprimed patches 'flash' as dull spots under paint). Full-room priming is done when going from a dark color to a light one, or when converting from oil to waterborne on trim.
Choosing paint finishes
Flat and matte finishes hide imperfections on ceilings and large walls. Eggshell is standard for most living areas because it balances subtle sheen with washability. Satin goes on kitchens, bathrooms, and high-traffic hallways. Semi-gloss is standard for trim, doors, and cabinetry. Our Interior Painting, Ceiling Painting, and Trim & Baseboard Painting services each use finish sheens chosen for the substrate.
Ventilation and final inspection
Waterborne paints have very low VOC, but ventilation still speeds cure and reduces lingering odor. We run window and box fans to move air through the room during application and for 24 hours after the last coat. Before removing masking we walk each wall in raking light — a shop light held near the surface — to catch any missed roller mark, holiday, or drip before it dries.
Frequently asked questions
How long does interior painting prep take?+
Prep on a typical room takes 1–3 hours depending on wall condition. Rooms with heavy patching or trim sanding can take a full day of prep before any paint goes on.
Do I need to move all my furniture out of the room?+
No. We move furniture to the center, drape it in canvas, and work around it. Only very small rooms or rooms with unusually heavy furniture need to be cleared.
Should walls be washed before painting?+
Yes. Even walls that look clean carry oils and dust that prevent bonding. A simple wipe with warm water and a mild cleaner is enough on most residential walls; commercial kitchens and industrial spaces need degreasing.
Do I need primer on every wall?+
No. Well-maintained walls in good condition can be recoated with quality paint that has built-in primer. Full priming is required over patches, stains, dark-to-light color changes, or when converting from oil to waterborne.
What paint finish is best for a home office?+
Eggshell is the standard for most home offices — washable enough to clean and low enough sheen to hide minor wall imperfections. Trim and doors get semi-gloss for durability.
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