Tilt and turn windows explained

How the two opening positions work

A tilt and turn window uses a single handle to control two separate opening actions, and the position you choose depends on how far you turn the handle. Turn it to the first position, roughly ninety degrees from closed, and the top of the sash tilts inward while the bottom stays put, creating a narrow gap along the top of the frame. Turn the handle a full one hundred and eighty degrees and the whole sash swings inward on hinges at the side, like a door.

Because the mechanism is built around a multipoint locking gearbox rather than a simple hinge, the sash locks securely in the closed position and cannot be knocked open accidentally. The tilt position is meant for background ventilation and is not large enough for anyone to climb through, which is one reason it is popular for bedrooms where you want fresh air overnight without leaving a window wide open.

Ventilation without a wide open window

The tilt function gives a controlled trickle of air rather than the full opening you get from a casement window pushed out on its hinges. This suits rooms that generate moisture, such as bathrooms and kitchens, because you can leave the window tilted for extended periods to let steam escape without worrying about rain blowing in or the window catching in the wind.

It also suits homes near a busy road or a shared path, since a tilted window sits close to the frame rather than projecting outward, so there is less chance of it being caught or damaged by someone passing close to the building.

Cleaning the outside glass from inside

Turning the sash fully inward brings the outer pane within arm's reach from inside the room, which is the main reason tilt and turn windows are chosen for upper floors, flats and any property where getting a ladder to the window is impractical or unsafe. You can wipe both faces of the glass, clean the frame and check the seals without leaving the house.

This is a genuine practical advantage over a fixed or top hung casement on an upper floor, where the outer face can only really be cleaned from a ladder or by a window cleaner with extended equipment.

Flats and upper floor properties

Tilt and turn windows are common in flats and blocks of flats partly because of the cleaning benefit and partly because the inward opening does not project into a shared walkway, balcony or the airspace above a neighbour's window the way an outward opening casement might. For upper floor rooms in a house, the same inward swing means there is nothing overhanging a path or drive below.

One point worth considering is space inside the room. A fully turned sash swings well into the room, so furniture, curtains and blinds need to be positioned with that in mind, particularly in smaller bedrooms.

Escape use in an emergency

Turned fully inward, a tilt and turn window opens to a wide, unobstructed gap, which is useful in a bedroom where building regulations expect an escape route in case of fire. The opening tends to be larger and more consistent in shape than a side hung casement, which can help where a room only has one usable escape window.

It is still worth checking the actual clear opening size against guidance for the room in question, since sill height and any transom bars can affect what counts as usable escape width and height.

Hardware, handling and everyday use

Living with a tilt and turn window day to day comes down mostly to the handle and hardware, which are built to a higher specification than a simple casement given the two jobs they need to do.

• A single handle controls both tilt and turn, so there is nothing extra to learn once you know the two positions
• The gearbox and hinges carry more of the sash weight than a standard casement hinge, so quality hardware matters over the years
• Child safety restrictors are commonly fitted so the window can be used in the tilt position without a small child being able to turn it fully open
• Handles and hinges should be lubricated occasionally to keep the action smooth, the same as any window

Glazing weight and frame sizing

Because the whole sash swings inward on side hinges rather than resting on a top hung hinge, tilt and turn frames and hardware need to cope with the full weight of the glass unit hanging on those hinges when open. This is well within what modern uPVC and aluminium systems are designed for, but it does mean the frame profile and hinge specification are chosen to suit the size and weight of glass involved, particularly on larger sashes.

Your surveyor will take this into account when specifying a tilt and turn window, especially for bigger openings where a heavier double glazed or triple glazed unit is involved.

How the cost compares with casement windows

Tilt and turn windows generally cost a little more than an equivalent size casement window, reflecting the more complex gearbox, additional hinges and the two way locking mechanism. The difference tends to be modest per window rather than dramatic, and it is often outweighed by the practical benefits on upper floors or in flats where standard cleaning access is not available.

We can give you a fixed written price that compares tilt and turn against casement options for the same opening, so you can weigh up the small cost difference against how the window will actually be used day to day.

Common questions

Can a tilt and turn window be left tilted in the rain?

Yes, the tilt position is designed to sit under the frame's drip profile so it can be left open a crack in most weather, though very driving rain can still get in depending on wind direction.

Are tilt and turn windows secure?

They lock at multiple points around the frame when closed, similar to a good casement window, and locking hardware quality matters more than the opening style for overall security.

Do tilt and turn windows suit period properties?

They are more associated with a contemporary look, so on a period property we would usually discuss whether a traditional casement or sash style keeps the character you want.

Can children open a tilt and turn window fully by themselves?

Restrictors are commonly fitted so the tilt position can be used freely while the full turn opening needs a deliberate extra action, but no restrictor replaces normal supervision near open windows.