How do Tilt & Turn windows actually work?
Tilt & turn windows have two modes of operation: a tilt mode for ventilation and a turn mode for cleaning or emergency exit use.
Locking is by a number of cams (espagnolettes) located on a sliding mechanism around a perimeter of a window vent. When the window is shut, with the handle in its closed position, the cams are engaged in keeps fitted around the window frame.
These windows can be supplied in either tilt-before-turn or turn-before-tilt mode. If you are in any doubt as to the sequence of operation, please contact your installer.
The handle of a tilt-before-turn window can be placed in three positions ‘Closed’, ‘Tilt’ or ‘Turn’. The window must always be fully shut before changing the handle position. In the ‘closed’ position the handle points vertically downwards.
To tilt the window, turn the handle through 90 degrees until its horizontal then pull the window inwards. The base of the window remains hinged to the frame whilst the top tilts inwards for ventilation.
To turn the window from the tilt position close the window and turn the handle 90 degrees to the vertically upward position and pull the window inwards. The side remains hinged to the frame whilst the window can be opened inwards to any required position.
The window can be locked by pulling the window shut and turning the handle so that it points downwards to the floor.
In an opened tilt position this would be a downward handle turn of 90 degrees and in a turn position the window should be pulled closed and the handle be turned 180 degrees downwards to the locked position. Secure using the key and remove the key when not in use.
Is Aluminium environmentally friendly?
A significant volume of waste building materials goes to landfill sites, at a cost to both the economy and the environment, others are recycled at a cost to the community. Aluminium, however, is recycled in a way that pays for itself. Aluminium components can usually be recycled in a single process using up to 95% less energy than the primary production process.
As almost all aluminium used in construction is recycled, the considerable energy invested in the production of primary aluminium can be reinvested into other aluminium products. Scrap may not necessarily be recycled back into its original product or even reused in the country in which it was first manufactured but the original energy investment will not be lost.
Do Aluminium Doors and Windows Corrode?
Aluminium is resistant to corrosion, so if you’re looking for a low maintenance window, then aluminium is your answer. That’s because when aluminium comes into contact with air, a protective layer of aluminium oxide immediately forms on the surface. This layer is extremely resistant to corrosion from anything the weather can throw at it, including acid rain, and won’t be damaged by cleaning products. Unlike timber or PVC-U frames, aluminium window frames won’t swell, crack, split or warp over the years whatever the weather. Protection from corrosion can be increased even further by anodising or painting (usually by powder coating) the surface.
I know Aluminium is lightweight, but how strong is it and can it withstand harsh winters?
Aluminium alloys are used to make window door and curtain wall frames. That is because pure aluminium on its own doesn’t have a high tensile strength. However, once it is alloyed with other elements like manganese, silicon, copper and magnesium its strength increases vastly. The tensile strength of pure aluminium is around 90 MPa but can be increased to over 690 MPa as an alloy. In fact, Aluminium which as we’ve already seen is one of the lightest engineering metals, has a far better strength to weight ratio than steel when used as an alloy. Even more impressive, unlike steel, the strength of aluminium increases the colder it gets, whereas steel becomes brittle at low temperatures (below 0oC). This means that aluminium windows, doors and curtain walling can more than cope with the most extreme winter temperatures in the UK. The lowest temperature recorded in the UK was -27.2°C in Scotland.
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