Level 4 finish
Level 4 finish means seams and fasteners are covered and sanded, ready for paint, with a typical residential smooth finish.
Why it matters
It is the most common standard. It can look great with normal lighting and paint, but it can show flaws with strong side lighting.
Where people get this wrong
Level 4 can still show seams in high light areas. Flat paint helps hide flaws, while glossy paint shows them.
Real-world example
A hallway with a few ceiling lights looks fine. Then you add a wall sconce that washes light across the wall and the seams show. That is a common Level 4 reality.
Where this hits your build
This comes up during the finish phase. Lighting, angles, and personal expectations collide here. What looks fine at noon can look rough at dusk.
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