Attic rooms

What the condition actually does

An attic room is a sloped-ceiling room with altitude: more daylight than any floor below it (and from above, which rooflights deliver at double strength), more temperature swing than any other room, and a plan drawn by the roof rather than by anyone’s convenience. The layout rule is the slope rule — sitting and sleeping under the low sides, standing uses at the ridge — plus an attic-specific one: heat control is a design material here, because an uninsulated, unshaded attic is a greenhouse in July and a tent in January.

The first move

Fit blinds to the rooflights before anything decorative. Sleep, screens and summer afternoons all depend on it, and every other choice can wait a month; this one gets regretted by the first sunny weekend.

Light under this condition

Rooflights leave the eaves dark by contrast: add low warm sources at the knee walls so the room’s edges exist after dusk, and uplight a beam or the ridge to give the ceiling its shape back at night.

What fights it

• Full-height furniture anywhere but the gable walls
• Ignoring blackout: a summer attic bedroom without rooflight blinds wakes at dawn, hot
• Boxing every beam into plasterboard until the room forgets it is a roof