Roof Windows & Overhead Glazing

When illumination from above is needed, Altherm roof windows and skylights provide an ideal solution. Opening windows are available with a range of winder options, or fixed windows can be supplied.

Opening Profile roof windows allow high level ventilation and are hinged at one end rather than centrally pivoting so that weather resistance is assured. It can be left partially open for ventilation while still keeping the rain out.

Fixed glazing is available in small treatments or large, sun-trapping expanses. Overhead glazing can be made with Altherm glazing bars in visible spans or mounted on timber beams.

Custom Design

Create highly individual architectural features with custom designed windows. These allow an exciting departure from traditional styles.

Altherm have the experience and product range to make bold or imaginative designs a reality.
Our fabricators can draw on years of experience in meeting the wide range of requests for custom designed windows of all shapes and sizes.

Options include curved, raked, arched and faceted windows as well as glass blocks and louvre windows.

Greenhouse, Box & Bay Windows

These distinctively shaped window options project from the wall of a house to offer extra space, light and warmth.

Greenhouse windows have a sloping glass roof and are ideal in kitchens above benches. They also have a place in other living areas especially when built as corner windows.

Box windows usually come in two formats – with an elevated base or as a full height unit from floor to eave.

Bay windows are a timeless window design that can have full height glazing for maximum light and warmth, or be top glazed with a cladding base. The latter are often built with a window seat.

Bi-Fold Windows

For dramatic opening, Altherm bi-folds are the way to go. They can be built in a range of configurations and they all fold out of the way when fully open.

Because they are bottom rolling rather than top hung Altherm bi-folds can carry heavy panels with ease.

The Miro bi-fold window operator is the preferred option for opening hardware on Altherm bi-folds and is very user friendly. It also comes in a key-locking option.

Hinges and other hardware items can be coloured to match the windows.

Vertical Sliding Windows

Two types of vertical sliders are offered by Altherm. The standard double hung comes with either a traditional or contemporary style frame while the alternative, the Shugg window, has no horizontal rails.

As with the horizontal slider, the vertical slider has the advantage of not projecting on to decks and walkways.

Two frames are available – a scalloped colonial frame for a traditional look or one with a clean, flat face for a more contemporary appearance.

Both top and bottom panels can be moving or either one can be fixed.

In the Shugg window two panes of glass slide past each other for a frameless glass look.

Horizontal Sliding Windows

These come into their own when you need a window that doesn’t project on to walkways and patios. They’re ideal in servery situations – for passing food from kitchen to outside diners.

Single or double opening panels are available, and the panel stiles are robust box section profiles for strength and durability.

A special double slider window is possible where two panels on parallel tracks stack behind each other and allow the user the choice of which to open. Timber or metal shutters can also be included on a parallel track to the sliding window for privacy or sunscreen purposes. They’re ideal for night time ventilation and can have an insect screen attached.

Casement Windows

Altherm casement or side-opening windows open to approximately 55 degrees as standard, except where restrained by a restrictor. Opening to 90 degrees is available as an option.

Care needs to be exercised in putting casements where they open to prevailing winds as unfastened sashes may slam open in gusty conditions.

As with awning windows there is a condensation collection channel that gathers water and carries it away through a concealed drainage system to the outside.

Awning Windows

Altherm windows are admired for their clean, unlined surfaces. In keeping with contemporary tastes the emphasis has been on smooth extrusions with no grooves or ‘v’ lines.

This departure from traditional practice results in a clean, timeless look that won’t date your joinery.

The windows also have a clean look from the outside, with black vinyls not seen for most single glazed windows. This results from the pressure-fit glazing system that Altherm has adopted.

All Altherm sashes are made from strong box-section profiles. That means they don’t twist and flex when you open or close them.

Windows

Altherm meets contemporary demands for clean lines and smooth surfaces. There are no unsightly grooves or ‘v’ lines running along Altherm profiles. This design philosophy means that your Altherm windows will retain their good looks over the long term.

To ensure the cleanest possible look for our windows we have minimized the appearance of glazing vinyls when from the outside. These are the black lines that border most panes of glass in aluminium joinery. Pressure-fit glazing means there are no wedges on the window exterior when glass of the most common thickness is used. This feature has been extended to doors as well.

Altherm has recessed the condensation channel into the reveal or jambliner in order to enhance both aesthetics and performance. Any condensation that forms is collected and carried away through a concealed drainage system to the outside.