Local conditions
What this climate does to a natural fibre
Linen Moves With The Weather
Brisbane and the Gold Coast sit under months of high humidity, and linen is the fibre that notices. It takes up moisture from the air and lets it go again, and the curtain lengthens and shortens as it does. On a 2.7 metre drop that movement is not theoretical — it is the difference between a hem that kisses the floor in August and one that sits in it in February. A polyester curtain does not do this, which is exactly why a polyester curtain does not look like linen.
The second problem is the one nobody asks about at the measure. East-facing glass on this coast takes direct sun from first light, and natural fibres are less tolerant of UV than synthetics — the Your Home guidance on glazing is clear that east and west glass is the hard case, because the sun sits low and an eave cannot reach it. A linen curtain on unshaded western glass will fade along the leading edge first, and it will do it faster than you expect.
So we ask which way the window faces before we talk cloth. Anyone who does not ask is selling you a fabric, not a curtain.