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However, normal uPVC does have a slight disadvantage that it is ductile and can warp somewhat over time. That is why it is important that your uPVC French doors have a steel core. Such a steel core also provides sufficient protection against burglars. That is why our uPVC profiles come from the renowned German manufacturer aluplast.

French doors of wood (or timber) are a good ecological solution and have a very noble appearance, which can be further enhanced by the integration of glazing bars. However, as wood is also a natural raw material, it requires a little care and maintenance. Furthermore, regular glazing and repainting can preserve it for a long time. Only the highest quality wood is used for our French doors, for example, hardwoods like Oak. This grade A wood is free of knots and larger resin inclusions and thus offers high stability and durability.

Wooden French doors, in turn, compensate for this small shortcoming with their good soundproofing properties and insulation values, resulting in further plus points for their purchase. With wood as a naturally sustainable raw material, these doors are the most environmentally-friendly.

French doors of aluminium are very long-lasting and also have an exclusive appearance. Their good thermal insulation also stands out positively. A coated surface improves the profile's weatherproof qualities.

All in all, the corrosion-free and weather-resistant components create a very high functionality and long-lasting effect. These external doors hardly need any maintenance and care – which saves a lot of time. Compared to a wooden French door, you do not have to re-treat or repaint the material.

This, in turn, offers the possibility of applying a new colour again and again on wood. The purchase costs of an aluminium French door are also higher than for other materials. Another disadvantage is that aluminium has very good thermal conductivity, which can lead to condensation and mould.

On the other hand, the thicker construction depth of these exterior French doors ensures the best possible stability, which makes them dimensionally stable and prevents them from warping. It is therefore important to weigh which advantages are particularly convincing with each material.

A material mix of uPVC and aluminium combines the positive properties of both materials and thus meets the highest demands. The energeto® 5000 view profile of uPVC also provides 16% more light in the interior with its slim design. Another reason for choosing this modern material combination.

French doors should always be well secured, especially if your balcony is out of sight of the neighbourhood. Otherwise, burglars will have an easy time because windows, front doors and other eternal doors are still among the most vulnerable points of buildings. In the case of very cheap and outdated doors, all that is often needed is a crowbar and a screwdriver, and the damage is done.

To get really well-secured French doors, we recommend highly effective features such as toughened or laminated safety glass, locks and fittings, ideally also an alarm system and roller shutters. Lockable window handles further increase the security of French doors. You will find all of the above elements on windows24.com.

As with windows, the price depends on the particular model, the material, size, glazing and many other features. However, to give you an idea of the purchase costs, we give you a direct price comparison in the following table, using a basic model for each material with dimensions of 100 x 200 cm.

These dimensions are the typical order sizes for French doors, but of course you can also order other dimensions. The heat transfer coefficient of a glass, called Ug-value, varies depending on the glass type of the pane and the number (double or triple glazing). The lower the Ug-value, the better the thermal insulation and the higher the price. Whether and how the door can be opened is also relevant.

In the configurator, you can determine all the details and functions of your new French doors: From the material to the opening direction and mechanism, and the colours, you can choose from a great selection.

For example, you can opt for a tilt-and-turn mechanism or a sliding function. Lift-and-slide doors also have the advantage that they allow access to the patio up to 6.7 m wide. One, two or three sashes – here, too, you are free to choose. Multi-leaf and double doors are available with or without a centre mullion. With this design, the door can be opened completely, as the mullion is mounted on the sash profile. A barrier-free design without a threshold lets you get into the garden or onto the balcony without any obstacles or bumps.

You should place a great deal of emphasis on security. French doors and patio doors are often used as a weak point to get inside the house during burglaries. A door that protects against burglary is therefore highly recommended, especially if it functions as a back door.

You can never do "too much" when it comes to the energy efficiency of French doors either. To ensure that no heat is lost through the relatively large building element, we offer special thermal insulation glazing, for example, which will save you considerable heating costs in the long run.