Venetian blinds — timber for character, aluminium for the lagoon air

The adjustability argument

One blind, four different rooms

A roller blind is open or closed by degrees; a venetian steers light by direction. Tilt the slats up for glare-free daylight, down for privacy from a neighbour's upper storey, or closed flat for dark — all without raising or lowering the blind itself. On a Knysna window with hour-by-hour light changes, from misty morning to hard afternoon glare off the water, that adjustability does more work than a fixed fabric ever could.

Timber, for the rooms that want warmth

The natural choice for a heritage window

50mm basswood or bamboo slats bring real wood grain and warmth into a room — the obvious fit for Belvidere's Georgian and Victorian-revival cottages, sash windows, studies and anywhere the architecture is doing real work. Timber wants to stay out of high-steam rooms, but a proper lacquer finish handles Knysna's normal, year-round humidity without trouble. On a very wide window, timber's extra weight usually means splitting the blind or adding ladder-tape support rather than running one oversized span.

Aluminium, for the rooms the lagoon reaches first

The moisture champion

25mm slats (the crisp, most popular width) or 50mm (bolder, fewer lines) in powder-coated aluminium shrug off humidity in a way fabric and timber can't — the honest first recommendation for kitchens, bathrooms, sculleries and any room where lagoon-driven damp is a daily fact rather than an occasional one. Near open water, powder-coated aluminium also handles salt air far better than raw metal, though an occasional rinse-wipe still matters at a genuinely exposed address like Brenton-on-Sea. The colour range runs wide, including wood-look finishes for anyone who wants the aluminium performance with something closer to a timber look.

Choosing between them

A simple rule of thumb

If the room is a bathroom, kitchen, laundry, or sits directly on the open coast — aluminium. If the room is a heritage cottage, a study, or anywhere "real material" is part of the point — timber, with a proper lacquer finish. Most Knysna homes end up running both, room by room, and that's the honest answer more often than a single house-wide choice.