Levels 0 through 5 in plain language, what each one suits, and the three situations where paying for Level 5 is genuinely worth it.
These are the industry-standard levels defined by the gypsum association and used across the trade. Your quote should state which one it is priced to.
Level 5 adds a full skim coat across every square foot of surface, not just the joints. It is the difference between finishing the seams and finishing the wall.
Outside of gloss paint, very large walls and raking light, it is money you will not see. A contractor who upsells a skim coat for a basement rec room is not doing you a favour, and we will say so on site rather than quoting it quietly.
Where it does matter, it matters a lot. A west-facing window wall in a Port Dalhousie renovation, a double-height great room, anything getting semi-gloss — in those rooms Level 4 joints will read as faint bands once the light hits them at the wrong angle.
Flat, matte or eggshell means Level 4 is fine. Satin is borderline. Semi-gloss or gloss means Level 5, because sheen reveals everything underneath it.
A wall broken up by doors, windows and furniture hides a lot. A twenty-foot unbroken run with nothing on it hides nothing.
Light striking a wall at a shallow angle is the enemy of any joint. If a large window throws afternoon light along a wall rather than at it, budget for Level 5 on that wall.
Level 4. It suits flat, matte and eggshell paint, which is what the large majority of Niagara homes use. Bedrooms, hallways, family rooms and finished basements are all Level 4 work.
Three situations. Gloss or semi-gloss paint, because sheen reveals everything underneath it. Very large uninterrupted wall runs, where there is nothing to break up the plane. And rooms where strong side light rakes across a wall from a big window.
Roughly $0.60 to $1.20 per square foot of board surface on top of Level 4, because the skim coat is an extra pass across the entire surface rather than just the joints, plus extra sanding and drying time.
Yes, and it is often the sensible call. Level 5 the great room with the window wall, Level 4 everywhere else. We quote it that way regularly.
No, though high-build primers are sometimes sold as a cheaper alternative. They help, but they do not level a surface the way a genuine skim coat does. On a wall with raking light, the difference is visible.
The joints will likely show as slightly raised bands under the sheen, particularly in side light. It is the most common finish-level regret, and it is expensive to correct after painting.
Tell us the room, the paint and where the windows are. We will tell you which level it warrants, including when the answer is the cheaper one.