Many people believe that installing exterior venetian blinds yourself is unnecessarily complicated and that it cannot be done without a professional company. In reality, it is often exactly the opposite. If you choose the right type of blinds, measure them correctly and know what to expect during installation, the whole process is much easier than it may seem at first glance.

And that is their biggest advantage. When you handle exterior venetian blinds on your own, you can significantly reduce installation costs, keep everything under control and still achieve the same functional and aesthetic result as with a professional installation.

Why choose DIY exterior venetian blinds

Exterior venetian blinds are no longer just a design feature. They help protect the interior from overheating, reduce heat loss, improve thermal comfort in the home and also provide partial sound insulation. In summer, you benefit from a cooler indoor environment without overheated glass, while in winter you gain better thermal efficiency.

What is important is that many modern systems are designed so that selection, measuring and installation are as simple as possible. That is why exterior venetian blinds are suitable for DIY installation.

What type of exterior venetian blinds to choose

When choosing, the most important thing is to consider the stage of your building and how you want to install the blinds on the façade.

Mount-on exterior venetian blinds

Mount-on exterior venetian blinds are an ideal solution for retrofitting, meaning installation on a finished house or after the façade is completed. The blind box is visible and covered with a protective front panel.

This is a great advantage wherever you do not want to interfere with the building structure and need a quick and practical solution. Mount-on exterior venetian blinds are also very suitable for large glazing such as HS portals or corner window systems.

Self-supporting exterior blind

A Self-supporting exterior blind is the simplest option in terms of installation.

The entire blind forms one compact unit that is placed directly into the opening. In simple terms, the blind is “inserted” into position and then fixed in place.

Thanks to this:

• there is no need for complex assembly of individual parts
• installation is quick and straightforward
• the whole process can be handled easily on your own

That is why the Self-supporting exterior blind is a very popular choice for those who want to install exterior venetian blinds without unnecessary stress or complications.

Exterior venetian blinds with a purenit box including panelling

If you want the blinds to be as hidden as possible and plan the details in advance, the best choice is Exterior venetian blinds with a purenit box including panelling.

This solution allows the blind box to be integrated into the façade, creating a clean and minimalist appearance. At the same time, it ensures a technically correct and prepared installation space for the blinds.

This option is especially suitable for modern buildings where design and hidden installation details are important.

How to properly measure exterior venetian blinds

The good news is that measuring exterior venetian blinds is not complicated. In most cases, you only need a tape measure, a bit of time and attention to detail. Thanks to this simplicity, exterior venetian blinds can be easily ordered online.

Width measurement

The width should always be measured in at least three different points. The production dimension is then based on the smallest measured value.

For Mount-on exterior venetian blinds, the total width of the assembly including guide rails is measured. It is recommended to subtract approximately 3–4 mm from the smallest value as a tolerance.

For the Self-supporting exterior blind, the principle is the same — measure the width in multiple points and use the smallest value as the final dimension.

Height measurement

The height should be measured only after the window frame is installed and the reveals and window sill are completed. This is important because the finished connection affects the final dimension.

For Mount-on exterior venetian blinds, the height is measured from the top reveal to the window sill. From this value, about 20 mm should be subtracted to ensure a safe gap between the bottom slat and the sill. This gap helps prevent issues such as freezing.

For the Self-supporting exterior blind, the height is again measured in multiple points and the smallest value is used. The final dimension includes the total height including the blind stack.

If you measure carefully and always in several points, you can easily handle the measuring process yourself.

What type of slats to choose

When choosing exterior venetian blinds, you will encounter different types of slats. They differ not only in appearance but also in performance, shading efficiency and overall visual effect on the façade.

The main difference lies in the shape of the slats.

The numerical designation always indicates the slat width, for example:

• C80 = 80 mm
• Z90 = 90 mm
• Z70 = 70 mm

C-shaped slats are a cost-effective and proven solution suitable for most standard windows.

Z-shaped slats provide better shading, quieter operation and improved sealing thanks to integrated rubber inserts.

As a general rule:

• narrower slats are better for smaller windows
• wider slats are more suitable for larger glazed areas

It is also recommended to use the same slat type across the entire building for a consistent architectural appearance.

How to choose control options

Another important decision is the control system.

Manual control (crank handle) is the simplest option, but it requires routing the control mechanism through the window frame or wall into the interior.

A motor with a wall switch offers more comfort but requires electrical preparation.

A motor with remote control is the most convenient solution. It eliminates the need for wall switches and makes operation easier and more comfortable.

For DIY installation, motorized control is often more practical than it may seem and also allows for future integration into smart home systems.

How to choose guide rails and covering panel

Guide rails and covering panels are also an important part of the selection.

Available options include:

• single guide rails
• double guide rails
• shared guide systems
• corner guide rails for corner installations

If you are not using a built-in system, it is generally recommended to choose a version with a covering panel. It provides better protection and a cleaner final appearance.

In contrast, the version without a covering panel is used when the blind is already integrated into a prepared box system, such as Exterior venetian blinds with a purenit box including panelling.

Can I really install exterior venetian blinds myself?

YES. That is one of the biggest advantages of modern systems.

If you measure correctly, choose the right type of blinds and follow the recommended procedure, installing exterior venetian blinds yourself is entirely manageable without complex tools.

This is where the biggest savings come from. By handling both measuring and installation yourself, you save money, time and avoid waiting for installation appointments.

DIY exterior venetian blinds make sense

If you are looking for effective shading that prevents overheating, improves thermal comfort and does not require a complicated installation process, exterior venetian blinds are a very practical solution.

If you are unsure about the selection or measuring, it is always a good idea to consult an expert who can help you choose the most suitable solution for your home.

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