Moisture and Humidity: The Best Blinds for Bathrooms and Kitchens

Why wet rooms are different

A bathroom or kitchen window sees repeated cycles of high humidity, condensation running down the glass, splashes, and in kitchens, airborne grease that binds dust to every surface.

Materials that are perfectly fine in a living room fail here in predictable ways. Real timber slats swell and cup. Fabric roman blinds hold smells and grow mould along the fold lines. Untreated polyester rollers develop black spotting at the bottom bar within a couple of years.

The fix is material selection, and it costs very little extra if you get it right at quote stage.

What survives: PVC, aluminium and composite

PVC and polyester-PVC roller fabrics are the default recommendation for bathrooms. They're non-absorbent, they wipe clean, and they tolerate direct splashing. Many are specifically finished with an antimicrobial treatment.

Aluminium venetians are the default recommendation for kitchens. They handle steam without complaint, they're the only blind you can realistically take down and wash flat to shift baked-on grease, and they're cheap enough to replace eventually without much pain.

Faux wood — PVC or composite made to look like timber — gives the warm look of a wooden blind with none of the swelling. In a kitchen where you want the timber appearance, this is the correct product, not real basswood.

Waterproof composite shutters (ABS or vinyl) work well in bathrooms and look considerably better than most alternatives, at a price.

What doesn't survive

Real wooden blinds in a bathroom will cup and warp, usually within the first winter. The ladder cords also shrink unevenly, so the blind ends up hanging crooked as well as damaged.

Roman blinds and any heavy fabric blind hold moisture in the folds and hold cooking smells indefinitely. They also can't be washed without ruining them.

Standard untreated polyester roller fabric will do the job for a while, then start spotting along the bottom edge. If a quote for a bathroom just says 'roller blind', ask specifically what the fabric is.

The ventilation problem no blind can fix

If a blind in your bathroom is going mouldy, the blind is the symptom.

Condensation and mould at a window mean the room's moisture isn't being removed. A better blind slows the damage; it doesn't stop it. The actual fixes are an extractor fan that runs long enough after a shower (fifteen to twenty minutes, which most overrun timers don't allow), keeping trickle vents in the window frame open rather than taped shut, and leaving the door open after showering.

This is worth stressing in Irish houses generally, and particularly in the wetter counties — Donegal, Leitrim, Mayo and Sligo all average over 200 wet days a year, and indoor humidity stays high for months. Specify the right blind, but fix the ventilation.

Fitting details that matter in wet rooms

Face fix above the window rather than in the recess where you can. It keeps the blind's fixings out of the wettest part of the reveal and lets air move behind the blind.

Avoid mounting a blind tight against tiles where condensation runs down — the water collects at the bottom bar and sits there.

Leave the blind down after a shower, not rolled up. A rolled damp blind holds moisture at the core and that's where mould starts.

Keep any blind at least 300mm horizontally from a gas hob. This is a fire clearance, not a moisture one, and it's the more serious of the two.

Check that the blind doesn't block a trickle vent at the top of the window frame — a surprisingly common mistake that makes the room's humidity worse.

A straightforward specification

Bathroom with a shower: PVC roller, face fixed, antimicrobial finish, left down to dry after use.

Bathroom without a shower: aluminium venetian or a moisture-tolerant roller. Less critical.

Kitchen window over a sink: aluminium venetian, or a wipe-clean PVC roller.

Kitchen where the look matters: faux wood venetian, never real timber.

Utility room: aluminium venetian. Cheap, robust, wipes clean.