Interior Painting Checklist for Homeowners

Phase 1: Before You Start — Planning and Assessment

1. Walk every room and assess the walls honestly. Look for cracks, holes, water stains, mould spots, or peeling paint from previous jobs. Make a list — these all require attention before paint goes on. Water stains in particular need to be stain-blocked before painting or they will bleed through any number of coats.
2. Decide on scope. Are you painting walls only? Walls and trim? Ceilings? Closets? Be specific. Scope creep mid-project (for professionals or DIY) costs time and money. Know exactly what you're doing before you start.
3. Choose your colours and order samples. Get sample pots from Benjamin Moore, Sherwin-Williams, or a quality paint supplier. Paint A4-sized patches on the actual wall and live with them for two or three days in different lighting conditions. Colours look different in morning sun vs. evening lamp light vs. grey overcast day.
4. Decide on finish/sheen for each surface. Walls, trim, ceilings — each typically gets a different sheen. Refer to the sheen guide in my separate post on this topic for room-specific recommendations.
5. Get quotes (if hiring out). Get at least three in-person written quotes. Make sure each one specifies paint brand, number of coats, and what prep is included. Don't compare apples to oranges.
6. Confirm timing and access. If hiring professionals, make sure you know the start date, expected duration, and who will have access to your home each day.

Phase 2: Prep — The Part That Determines the Result

1. Clear and protect the room. Remove small items, secure valuables, clear wall art and fixtures. Leave large furniture — it gets moved and protected with drop cloths.
2. Clean the walls. Grease, dust, and grime prevent paint from adhering properly. Kitchens especially need TSP (trisodium phosphate) or equivalent degreaser. Rinse thoroughly after cleaning and allow to dry completely.
3. Fill all holes and cracks. Use lightweight spackle for nail holes and small surface cracks. Use joint compound for larger repairs. Allow to dry completely — usually 24 hours for anything substantial.
4. Sand all patched areas smooth. If you can feel the edge of a patch, so can the paint — it will telegraph through the finish. Sand flat, then wipe away dust with a tack cloth or damp rag.
5. Prime where needed. Bare drywall, patches, stain areas, and anywhere you're making a significant colour change (especially dark to light) needs primer. Skipping primer in these situations is one of the most common painting mistakes I see.
6. Tape trim and anything adjacent to painted surfaces. Use a quality painter's tape (Frog Tape or equivalent). Apply to a clean, dry surface and press the edge firmly to prevent bleeding. Remove tape within 24 hours of painting — left longer, it can pull paint.

Phase 3: Paint Application

1. Paint ceilings first. Always work top to bottom. Ceiling paint drips and splashes — better to have it land on an unpainted wall than a freshly-painted one.
2. Cut in before rolling. Use a 2.5" angled brush to cut in along edges — ceiling line, trim, corners. Cutting in first means your roller doesn't need to work dangerously close to trim.
3. Roll in a consistent pattern (W or N pattern). Apply paint in a W or N shape and then fill in, keeping a wet edge to avoid lap marks.
4. Allow adequate dry time between coats. Most interior latex paints need 2–4 hours of dry time between coats depending on humidity and temperature. "Dry to touch" is not the same as "ready for second coat." Follow the paint manufacturer's recommendations.
5. Apply second coat. Don't shortcut this. One coat is not sufficient coverage on any previously painted surface, and coverage problems become very visible once furniture is back in place under normal lighting.
6. Paint trim last. After walls are done and dry, do the trim. This allows you to cut the trim neatly against the wall without worrying about getting on fresh wall paint.

Phase 4: Finish and Cleanup

1. Remove tape while paint is still slightly tacky — not wet, not fully cured. Score the tape edge lightly with a utility knife if needed to prevent lifting.
2. Touch up any missed spots or holidays. View the finished room with a strong sidelight (hold a lamp close to the wall surface). Holidays show up under raking light that look invisible under normal room light.
3. Replace outlet covers, switch plates, and hardware. Don't reinstall hardware until the paint is fully cured — pressing hardware into fresh paint leaves marks.
4. Save leftover paint in a sealed, labelled can. Store flat in a temperature-controlled location (not a garage that freezes). Include the room name and date. You'll want this for touch-ups.
5. Allow full cure time before cleaning walls. Paint is dry to touch long before it's fully cured and hardened. Give it 2–4 weeks before any serious cleaning — especially satin and semi-gloss finishes that are still soft when fresh.

Hiring Professionals vs DIY: A Practical Note

This checklist applies whether you're doing the work yourself or overseeing a professional. If you're hiring us, the prep and application phases are fully on us — you're involved mainly in phases 1 and 4. If you're DIY-ing, the prep phase is where most homeowners underinvest time. A professional prep job on a DIY paint project will dramatically improve your result. Spend the time.

If you have a project in Toronto or the GTA and want to discuss whether professional or DIY makes sense for your specific situation, I'm happy to give you an honest assessment. Call 437-242-3829 or use the contact form.