Sunroom Ceiling & Walls — Bright White Repaint

Yes, and in a sunroom it is often the change that makes the whole space work. Interior brick needs degreasing and a masonry or bonding primer before the finish coat, because the mortar and the brick face absorb at completely different rates. Painted the same bright white as the surrounding walls and ceiling, the brick stops reading as a heavy feature and starts reading as texture.

Slowly, and mostly by brush. A coffered ceiling with exposed beams is almost entirely edges — every beam has four faces and two long cut lines where it meets the ceiling panel. Rolling the flats is the quick part. Painting the beams the same bright white as the ceiling, rather than leaving them a contrasting stain, is what lifts the whole ceiling visually and makes a low sunroom feel taller.

Noticeably, yes, because a sunroom has more glass than wall. Light comes in and then bounces, and every surface it touches either returns it or absorbs it. Taking a beamed ceiling, brick and walls from heavy original tones to a crisp bright white turns all of those surfaces into reflectors. The room gets the same amount of daylight and keeps far more of it.