Local conditions
What actually drives you inside
It is rarely the sun. It is the midges.
Sun is the reason people ring us. Dusk is the reason they buy. On the canal estates through Paradise Point, Runaway Bay and Hope Island — and on any low block sitting near water — the biting midges lift in the hour either side of sunset, which is precisely the hour you built the patio for. A straight-drop blind leaves a finger-wide gap down each side, and a gap that size is not a compromise to a midge. It is a door.
The second-order problem is the one no guide mentions. Every care page tells you to wipe the fabric down. The fabric is generally fine. What fails on this coast is the side channel: salt arrives on the air off the Broadwater, grit blows in off the sand, and the two of them pack into the bottom of the track until the zip starts to snatch on the way up. Ten seconds with a hose down each channel every few months is the whole maintenance schedule, and almost nobody is ever told to do it.
Inland it is a different calculation again, which is why outdoor blinds in Brisbane get a different fabric spec from the same job at Palm Beach. On the coast we specify componentry for salt air as a matter of course, because out here the fabric outlives the hardware more often than not — and a seized track is a much more expensive conversation than a faded one.