Kitchens and bathrooms are the hardest rooms in the house for window coverings, and the reason is not the sun.
Why fabric fails here
Steam and cooking grease settle into a fabric and stay there. A blind that looks fine in a lounge will, in a kitchen, go tacky on the surface and then discolour along the folds where it sits against itself.
The same blind in a bathroom takes steam daily and never fully dries if it stays down. Mould in the hem is the usual end point.
What copes
Aluminium venetian is the traditional answer in a kitchen: it wipes clean, it does not hold grease, and a damaged slat is cheap to replace. Faux wood does the same job and looks softer.
In a bathroom, a waterproof roller or an aluminium venetian works; a fabric roman blind does not, however good it looks in the showroom.
Sunscreen fabric is a reasonable middle ground where the window is large and you want the view, because it can be wiped, but it is still fabric.
Placement matters as much as product
Above a hob, nothing fabric should hang within reach of steam and splatter. If the window is right there, a venetian that can be wiped beats anything softer.
In a shower, keep the blind out of the direct spray line and leave it up after use so it dries. Half the failures we see are installation decisions, not product ones.
Questions about this
Can I put a roller blind above a stove?
Only with clearance from the hob, and a fabric that can be wiped. A venetian is usually the safer choice.
Do bathroom blinds need to be waterproof?
They need to tolerate steam and dry out. Fully waterproof matters most directly over a bath or shower.
What about mould on an existing blind?
Wipe with a mild solution and dry it fully; if mould is in the hem, the fabric is usually finished.
Free measure and quote
In-home, no obligation, and we will tell you what your windows can actually achieve.