A fresh coat of paint can completely transform a room — but only if the surface underneath is properly prepared. At Texora Painting, we've painted hundreds of homes across Delta, Tsawwassen, Ladner, and the Lower Mainland, and the single biggest predictor of a beautiful, long-lasting result is how well the walls are prepped before a single brush stroke is applied. Rushed preparation shows immediately: you end up with paint that peels, cracks telegraph through, and drips ruin your trim. This guide walks you through every step of how to prepare for interior painting like a professional.
The first order of business is creating a clean workspace. Move all furniture to the center of the room or, if possible, completely out of the space. Lighter pieces like chairs and side tables should leave the room entirely. Larger pieces like sofas and dressers can be pushed to the center and covered with plastic sheeting or canvas drop cloths.
Remove wall art, mirrors, outlet covers, and switch plates. Label them with painter's tape so you know which screw goes where — especially important in older BC homes where outlet configurations can vary room to room. Store screws in labeled sandwich bags taped to the corresponding cover.
Lay drop cloths on the floor along every wall you plan to paint. Canvas drop cloths are reusable, absorb paint better than plastic, and don't slip underfoot — a worthwhile investment if you're painting more than one room.
Coastal BC homes — particularly in Tsawwassen, Ladner, and Delta — often experience higher indoor humidity than drier parts of Canada. High humidity slows drying time dramatically and can cause paint to blister or sag. Run a dehumidifier 24 hours before painting and keep windows cracked for ventilation, even in cooler months.
Fresh paint will highlight every flaw in your walls, not hide them. This is the step most DIYers rush, and it always shows. Walk every wall in good raking light (a flashlight held at a low angle works well) and mark every crack, nail hole, dent, and scuff with a pencil.
For holes up to about 15 cm in diameter, lightweight spackling compound is your best friend. Apply it with a small putty knife, slightly overfilling the hole, then let it dry completely. Sand flush with 120-grit sandpaper and repeat if the compound shrunk. Most lightweight compounds dry in 30–60 minutes, but in a humid BC home you may want to give it 90 minutes to be safe.
Nail pops — where nails or screws have pushed through the drywall — are especially common in older homes. Drive a drywall screw one inch above and below the popped nail, then countersink the nail with a hammer and nail set. Cover with two thin coats of joint compound, sanding between coats.
Hairline cracks are common in BC homes, especially around door frames and windows where seasonal moisture changes cause wood to expand and contract. For hairline cracks, use flexible paintable caulk rather than rigid compound — it will flex with the movement instead of re-cracking. For wider cracks, open the crack slightly with a scraper, apply setting-type compound, and embed mesh tape before finishing with a skim coat.
Even walls that look clean are covered in a thin film of grease, dust, and airborne residue. Paint does not bond well to dirty surfaces — this is especially true in kitchens and areas near the front door. Skip this step and you risk paint that peels within a year.
Mix a solution of warm water and a small amount of trisodium phosphate (TSP) substitute (TSP itself is restricted in BC due to environmental regulations). Wipe walls in a gentle circular motion, working top to bottom. Pay extra attention to areas around light switches, door handles, and above heater vents. Rinse with clean water and allow walls to dry for at least 4 hours — or overnight in a damp coastal climate — before painting.
"Preparation is 70% of the job. The actual painting part is the easy bit." — our lead painter with 15 years in the Lower Mainland
Even if your walls seem smooth, a light sand with 150-grit sandpaper will "tooth" the surface, giving the new paint something to grip. This is particularly important when painting over a glossy finish. Use a pole sander to cover large flat areas efficiently, and hand-sand around trim and corners. Wipe down all sanded dust with a damp tack cloth — not a dry cloth, which just redistributes fine dust.
If you're repainting over a semi-gloss or high-gloss finish — common in bathrooms and kitchens — sand more aggressively with 80-grit to properly de-gloss the surface. Skipping this step is the number-one cause of peeling paint in high-humidity rooms.
Apply painter's tape along all trim, baseboards, window casings, and door frames. Press the tape edge down firmly with a putty knife or your fingernail to ensure no paint bleeds underneath. For perfectly clean lines, apply the tape, roll paint over the edge, then remove the tape while the paint is still slightly wet — pulling it back at a 45-degree angle.
If your ceiling and walls will be different colors, tape the ceiling line carefully. The alternative — cutting in by hand — is faster for experienced painters but unforgiving for amateurs. When in doubt, tape it.
Primer is not optional on new drywall, patched areas, or walls with stains. A quality primer seals the surface, ensures even sheen, and can dramatically reduce the number of finish coats needed — saving you time and money. In BC, look for primers specifically formulated for high-humidity environments, especially for bathrooms, laundry rooms, and any room on the north side of a home that stays cooler and damper.
For dramatic color changes — say, going from a dark charcoal to a pale linen — a tinted primer that's been mixed to a mid-tone between your old and new color will cut your finish coats from three down to two. Ask your paint supplier to tint your primer when you purchase it.
If you're painting new drywall in a home in Tsawwassen, Delta, or elsewhere in the Lower Mainland, always use a dedicated drywall primer-sealer. New drywall is highly porous and will absorb your finish paint unevenly, creating "flashing" — areas that look flat and dull next to areas that retained sheen. A drywall primer prevents this entirely.
Before you crack open your first can, do a final walkthrough. Check that all patches are sanded flush and there are no ridges. Confirm all tape is pressed down tight. Make sure ventilation is adequate — a fan pointed out a window works well. Check the temperature: most interior latex paints should be applied at temperatures above 10°C. In an older BC home that hasn't been heated, this can be an issue in shoulder seasons.
Fill your paint tray, load your roller to medium saturation, and you're ready to go. A well-prepared room will paint faster, look better, and the finish will last years longer than one that was rushed. If all this feels like too much work, that's exactly what the Texora Painting team is here for — we handle every step of the preparation process as part of our standard service.
Texora Painting handles all prep, painting, and cleanup. We serve Delta, Tsawwassen, Ladner, Port Coquitlam, and Port Moody.
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