Local conditions
Most of the glare here has already bounced
The Light That Ruins A Room Comes In Sideways
From Byron Bay to Brisbane, the light that makes a room unusable at four in the afternoon has usually hit something else first. Water, a pool deck, the pale render on the building opposite, a neighbour’s white roof. It arrives low and diffuse, from an aspect the eaves were never built for, and it does not care that the window it comes through faces south. In Main Beach, Currumbin and Hope Island we see it on windows the owner had written off as the shady side of the house.
That changes which openness you pick. Reflected glare fills a room rather than throwing one bright rectangle across the floor, so a weave that handles direct sun at ten per cent will still have you squinting at a screen. On the coastal strip we usually land a step tighter than the aspect alone would suggest — and because glass is where most of the heat gets in, the tighter weave usually earns its keep twice. The openness factor guide works through the numbers window by window.
The second local fact is humidity. Open-weave fabric in a bathroom or a laundry that never quite dries out will grow mould in the weave, and it is excluded from every fabric warranty we have read — so we would rather talk you out of one in there than fit it and wait.