A conservatory is a solution that allows you to enjoy the pleasure of close contact with nature all year round. In recent years, it has become increasingly popular, not only in detached houses but also in apartment buildings.

However, there can be no winter garden without high-quality windows – what properties should the window joinery we choose for this solution have?

What is a winter garden?

A conservatory is an enclosed space, usually glazed on three sides, added to the main body of the building or designed as a stand-alone structure.

The purpose of a conservatory is to create a space that allows you to relax or grow plants all year round – regardless of the weather conditions outside. The conservatory must therefore be designed to withstand humidity, temperature differences and adequate ventilation. In a winter garden with good-quality windows, rain, wind and snow do not frighten us!

There is no denying that window frames and glazing play a major role here – in fact, they form the basis of the effect, but they are also responsible for adequate thermal insulation. As an additional space, the conservatory becomes a kind of extension of the dwelling and introduces a new functional quality.

How has this trend evolved over the last few years?

Initially, conservatories were a luxury available only in large residences. The solution – now popular all over the world – originated in European countries, where they were used to grow exotic plants. Over time, conservatories have evolved: they have come to be used as an extension of the living space, a place for the dining room and even a home office.

Contemporary designs focus not only on aesthetics, but also on energy efficiency and functionality. Improvements in window technology, ventilation and insulation systems have contributed to the popularity of conservatories as a practical element of residential architecture.

Key window features that are essential for conservatory projects

The choice of windows with the right parameters has a decisive impact on the comfort of the conservatory. What features should characterise the window joinery in this type of project?

Thermal resistance – an essential element for energy efficiency

In conservatories, thermal insulation is a priority – especially during the cold months of the year. Windows need to exhibit a low heat transfer coefficient (Uw) – which means better heat retention inside the structure.

• Modern windows used in conservatories have a Uw factor of less than 1.0 W/m²K, which ensures energy savings and stable temperatures.

If we are talking about thermal resistance, it is impossible not to mention the choice of windows with double or triple glazing and special filling of the space between them – the use of gases (e.g. argon) reduces heat conduction.

Moisture and condensation

A conservatory, due to the large amount of glass, is much more exposed to moisture and the risk of condensation on the glass surfaces. Windows must therefore be made of moisture- and corrosion-resistant materials.

The best solution is PVC or aluminium frames with an anti-corrosion coating, which effectively resist the damaging effects of moisture. In addition, suitable window profiles should provide space for drainage systems that avoid condensation and the accumulation of moisture on the surface.

UV protection

UV radiation can adversely affect the materials inside the conservatory, causing colour fading and weakening the structure of some materials.

Therefore, conservatory windows should have a UV protection layer. Low-E (low emissivity) coated glass, which reflects UV rays, provides protection against the harmful effects of radiation. It is also important that the special glazing coating protects, but at the same time allows light to pass through and does not interfere with visibility.

Wind and snow pressure loads

Winter gardens are exposed to strong weather conditions (e.g. wind and snow). The design of the windows should therefore be suitable for high static and dynamic loads.

It is important that the windows are certified for wind resistance (class C4 or higher) and snow pressure.

Aesthetic variety and adaptation to the style of the interior

The conservatory (as an extension of the interior) should harmonise with the aesthetics of the house. Fortunately, the choice of windows does not have to disrupt this. The wide range of colours and textures of the frames allows the products to fit in seamlessly with other architectural elements.

Whether your interior is classic, minimalist or industrial, you have numerous options for the material, finish and colour of your windows. Woodgrain finishes, anthracite shades or metal structure allow you to achieve a look that matches the character of your home.

What solutions do window manufacturers offer us?

Modern window joinery offers a wide range of technological solutions that can be used in conservatories:

• low-emission coatings,
• automatic ventilation systems,
• windows with burglar-proof systems,
• systems to limit the accumulation of dirt.

Choose elements for your conservatory with a view to increasing the comfort of use, but also the safety and durability of the structure.