Should I skim coat my walls before painting if they have minor imperfections in my Moncton home?

Whether to skim coat depends on the severity of the imperfections and the sheen level of paint you plan to use. For minor dings, small nail holes, and hairline cracks, spot-filling with joint compound is usually enough. For walls with widespread texture, numerous repairs, or if you're planning a satin or semi-gloss finish that will highlight every flaw, a full skim coat gives dramatically better results.

Paint sheens are brutally honest about wall imperfections. Flat and matte paints hide surface irregularities well — the low-reflectance finish scatters light and your eye doesn't catch the bumps and dips. But as you move up the sheen scale toward eggshell, satin, and semi-gloss, those same imperfections become increasingly visible in raking light. In an older Moncton home with walls that have been painted and patched over decades, a coat of paint at even eggshell sheen can make the wall look like a topographic map under a window with afternoon sun streaming across it. If your client history, flat paint will cover a lot of sins. Satin will not.

A skim coat is a thin layer of diluted joint compound spread over the entire wall surface with a wide drywall knife, then sanded smooth after drying. The goal is a flat, uniform surface — not filling deep holes, but levelling the micro-texture of old paint, lap marks from previous roller applications, and the countless small imperfections that accumulate on walls over years of patching. In Moncton homes built in the 1970s-1990s, walls often have stipple texture on them from original finishing — if the homeowner wants a smooth finish now, the stipple must either be skim-coated over or removed, and skim coating is almost always the more practical approach.

Practically speaking, assess your walls at an angle with a bright work light held close to the surface. This raking light reveals texture and imperfections that are invisible under normal room lighting. If you see widespread roughness, tool marks, or patching that covers more than 20-30% of the wall area, a skim coat will give you a far better result than spot-filling alone. If you only see a handful of specific spots, patch those, sand flush, prime the patches, and you're good to go.

For homeowners comfortable with drywall work, a skim coat is a DIY-able project — joint compound is forgiving and you can sand out imperfections. But getting a truly flat skim coat takes practice, and a skilled painter or drywall finisher can skim coat a room much faster and flatter than most DIYers manage. In Moncton, skim coating a typical bedroom runs around 00-450 on top of painting costs, depending on wall condition. For a kitchen or living room where you want to show off a nice satin finish, it's money well spent.

After any skim coat, always prime with a PVA or high-build primer before your finish colour. The freshly skimmed surface is porous and will flash badly without a primer coat, exactly like new drywall.

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