How do Ottawa painters prep rooms before starting an interior paint job?

Professional room prep is what separates a paint job that looks magazine-worthy from one that looks like a weekend rush job. Ottawa painters who do this for a living follow a systematic process that protects your home, ensures the paint bonds properly, and produces clean, crisp results. Here's exactly what that process looks like.

Step 1: Room Assessment and Planning

Before anything gets moved, a good painter walks the room and notes:

• Wall condition — cracks, nail pops, drywall damage, peeling paint
• Moisture issues — especially in Ottawa homes where winter condensation on cold exterior walls is common, and basements in areas with high water tables (Barrhaven, parts of Orleans, riverside neighbourhoods)
• Lead paint risk — homes built before 1980 may have lead paint. Ontario's Occupational Health and Safety Act requires specific handling. Professional painters test suspect surfaces before disturbing them
• Ceiling condition — popcorn/stipple ceilings common in Ottawa homes from the 1970s-90s need special attention
• Trim and baseboard condition — warped or damaged trim that needs caulking

Step 2: Furniture and Floor Protection

Everything gets moved. Professional Ottawa painters either:

• Move all furniture to the centre of the room and cover with heavy-duty canvas drop cloths (not plastic — plastic is slippery and doesn't absorb drips)


• Move furniture out of the room entirely for larger jobs

Floors get protected with canvas drop cloths or rosin paper taped to hardwood with painter's tape. In Ottawa homes with expensive hardwood floors (especially the refinished originals in Glebe and Westboro century homes), painters use extra care — typically rosin paper plus canvas for double protection.

Light fixtures get either removed or bagged with plastic and tape. Outlet and switch plates are always removed — taping around them is an amateur shortcut that leaves visible edges.

Step 3: Cleaning Walls

Dirt, dust, grease, and cobwebs prevent paint adhesion. Ottawa homes present specific cleaning challenges:

• Kitchen walls — grease film from cooking, even in well-ventilated kitchens, needs degreasing with TSP (trisodium phosphate) or TSP substitute. Cost: $8-$15 for enough to do a kitchen
• Bathroom walls — soap residue and potential mould/mildew, especially in older Ottawa bathrooms without exhaust fans
• Heating vent areas — dust streaking above/below forced-air vents is common. Ottawa homes run furnaces 6-7 months per year, so dust buildup is significant
• All walls get a wipe-down with a damp cloth or dry sponge at minimum

Step 4: Wall Repair

This is where time and skill really show. Ottawa homes are notorious for seasonal movement cracks caused by our temperature extremes. Common repairs include:

• Hairline cracks along drywall seams and above door/window frames — filled with flexible paintable caulk or mesh tape and compound for recurring cracks
• Nail pops — driven back in and covered with joint compound. These happen because Ottawa's extreme temperature cycling causes framing lumber to expand and contract, pushing nails out of drywall
• Drywall dings and holes — patched with setting-type compound (not premixed — setting compound is harder and sands smoother)
• Plaster cracks in older Ottawa homes (pre-1960s) — stabilized with plaster adhesive if loose, then filled with setting compound

All patches get sanded smooth (150-220 grit) and wiped with a damp sponge or tack cloth. Budget $100-$400 for typical wall repair on a standard Ottawa room, depending on condition.

Step 5: Priming

Every patched or repaired area gets spot primed at minimum. This ensures uniform sheen and absorption across the wall — no "flashing" where patches are visible through the paint.

• New drywall or large patches: full coat of drywall primer ($30-$40/gallon)
• Stains (water, smoke, marker): shellac-based stain blocker like Zinsser BIN
• Dramatic colour changes: tinted primer to improve coverage
• Glossy surfaces being repainted: bonding primer or light sanding

Step 6: Taping and Masking

Blue painter's tape (FrogTape or 3M ScotchBlue) goes on:

• Ceiling lines (unless the painter cuts in freehand — many experienced Ottawa painters do)


• Window and door trim if only walls are being painted


• Baseboards


• Any surface not being painted that adjoins one being painted

Professional tip: tape goes on after priming, not before. This ensures the tape seals against a clean, primed surface for the sharpest possible lines.

Step 7: Caulking

The secret to a professional-looking paint job is caulking. Gaps between trim and wall, along ceiling lines, and around window casings get a thin bead of paintable acrylic caulk smoothed with a wet finger. This fills the inevitable gaps in Ottawa homes caused by seasonal wood movement and settling.

A tube of quality paintable caulk costs $5-$8, but it makes an enormous difference in the finished result.

What This All Costs

Professional interior prep in Ottawa adds roughly $1 to $3 per square foot of wall surface to the paint job, or $200 to $600 per average room. Combined with painting, expect $400 to $900 per room for a professional job (walls and ceiling, standard condition).

If you want this level of care for your home, the Ottawa Construction Network directory lists experienced interior painters. Ottawa Paint Contractors' Paint IQ covers more specific prep scenarios if you have unique wall conditions to deal with.