What kind of accessories are available for my roof window?

Various types of blinds are available for your roof window, including roller, Venetian, and blackout blinds, as well as an anti-heat blind. Some markets also stock roller shutters, an electrical window opener motor kit, and a manual opener rod for your roof window.

My roof window faces south and sometimes lets in too much light. What should I do?

We recommend a blind for sun protection. Please see the Blinds and Accessories section to discover more about our protective products.



You should ensure that the room is adequately ventilated. Also, be aware that condensation on the inside of the pane often comes from not having a heat source underneath the window. Furthermore, the interior lining should be horizontal over the window and vertical under the window, thereby ensuring optimum flow of air and maximum light.


There should be no condensation between panes of glass. Please contact your point of purchase to arrange a replacement.

Why do the panes of my windows fog up on the outside?

Fogging occurs when the air outside condenses when the temperature falls. It is a natural phenomenon.


To better control sunlight, we recommend you consider our roller shutter, blinds, and other products.

Can a roof window leak?

If correctly installed, using the original waterproof flashing system, your roof window will not leak.

Something was damaged in the packaging when I opened it. How can I get a replacement?

Please contact your dealer, who will contact us to obtain a replacement.

My pane is broken. What should I do?

Please contact your point of purchase.

There was something missing in the packaging. How can I get a spare part?

Please contact your dealer, who will in turn contact us to get the spare part.

I cannot find the invoice of the purchase of my roof window/blind/roller shutter, but I have a claim. What can I do?

The type plate is necessary for the identification of a product and time of production.


Is it easy to install a roof window?

Installing a roof window is quick and easy. Windows come with easy-to-follow installation instructions. For a step-by-step guide, see the photo-guide˙or the video on this website.

The distance between the rafters is too small, what should I do?

You can solve this problem by trimming the rafters in order to create the correct space. Note that there should be a distance of max. 30 mm between either side of a window and a rafter.

The distance between the rafters is too wide, what should I do?

In this case, you should frame out around the window by packing out the rafters. If the distance to the frame is still too wide (more than max. 30 mm on either side of the window, horizontal beams should be placed between the rafters - and a vertical rafter should be inserted between the beams.

How deep should I install the window into the roof?

The pre-grooved frame helps to position the mounting bracket of the frame. The fixed brackets determine the installation depth. For more information please see the installation instructions.

How should I shape the interior finishing around the window?

Over the window, the interior lining should be horizontal (parallel with the floor) whereas it should be vertical below the window (perpendicular to the floor surface). These precautions should be taken to ensure optimum flow of air and maximum light. Be careful that a windowsill placed directly underneath the window does not obstruct the flow of air by leaving an air gap between the sill and the wall.

I have a counter at the bottom of my window. Can I still install a roof window?

Yes, but to ensure the best airflow and avoid condensation you should cut a hole in the top right below the window. You can use a grid to close the hole.

Is it necessary to have a heating element near the window?

A heating element should be placed underneath the window in order to minimize condensation on the pane.

What is the flashing?

The flashing is necessary as it ensures a watertight connection with the roof, thereby removing the risk of water penetration.

How can I ensure a watertight MEMBRANE CONNECTION?

Please go to Installation Sequences and visit the Making the Frame Watertight section.

I have no membrane on my roof. Can I install my roof window anyway?

Yes, you can fix the L brackets directly onto the rafters. However, please note that a membrane is highly recommended to protect your interior wall against condensation.

What type of under-roofing should I use?

Any type may be used but take care that it is not perforated during the course of the installation to ensure a watertight installation.

Do I need to use a snow guard when I install roof windows?

Using a snow guard above your roof window is always recommended to prevent permanent damage.

Where should I place the brackets on the window when installing?

Since the frame is pre-grooved, bracket placement is clear. Position the bracket 10cm measured from the corner of the frame. For more information, please see the installation instructions.

Can I install two roof windows "back-to-back" on the top of my roof?

No, it is unfortunately not possible to install our roof windows in this way.

Can I install a roof window right above the other?

In some markets you can buy a combi-flashing called UCX which allows you to install one window above the other. Please contact your dealer to see whether this is available in your area.

Can I install two roof windows right next to each other?

In some markets you can buy a combi-flashing called a UCX, which is designed to allow for side-by-side installations. Please contact your dealer to see whether this is available in your area.

What minimum distance should be kept between two roof windows?

If you are installing individual roof windows you should aim to place two tiles between them measuring approx. 40-60 cm across. Alternatively you can buy a combi-flashing (UCX), which allows you to install two roof windows side-by-side. Please see more in the Choosing Your Flashing section


Has the wood received any treatment?

Our wood has been impregnated in order to minimize the risk of fungus, then varnished with a water-based lacquer to improve its appearance and create a more fungus-resistant surface. We highly recommend applying an additional water-based lacquer layer following installation.

Do I have to relacquer the wood?

We recommend that you re-lacquer the wood annually. However, the need for re-lacquering depends on the humidity of the room.

How should I clean the outside window pane?

You can clean the outside of the window by rotating the sash through 165 degrees, which gives you easy access to the outside pane. You should be sure to periodically clear leaves away from the flashing to ensure a free flow of rainwater around the window.

Do the hinges need lubrication?

We recommend that you lubricate the hinges from time to time, in order to ensure a smooth rotation of your window.

When cleaning the surface of the wood, what type of detergent should I use?

Hot soapy water is good for surface cleaning. Please note, however, that frequent cleaning may increase the need for re-lacquering of the wood.

How do I get rid of snow on the outside pane?

Simply open the window and brush off the snow. We also recommend that you install a heating element directly under the window to ensure not only that snow slides off more easily, but also that the risk of condensation on the window interior is minimized. We also highly recommend that you install snow guards externally above the window to avoid damage to the roof window under heavy snow loads.

Can I use any type of lacquer for my roof window?

You can use any type of water-based lacquer available on the market. Ensure that lacquer is applied evenly.


My window is installed too high and I can't operate it. What should I do?

If there are electrical openers available on your market, we suggest that you buy one of these. Otherwise, we recommend you buy a ZAR 108 or ZAR 112 opening rod.

My sash will not stay open - is someting wrong?

The sash is only designed to stay open in a slightly less than horizontal position. If your window will not stay open at all, you should contact your dealer.

Can I use the same remote controller for my roller shutter and electric opener?

No. you have to use separate remote controllers for each kind of product.


What is the lifespan of a roof window?

A roof window, like most other building materials, has a long life. If normal maintenance is undertaken, the life span may be vastly prolonged. Many of our roof windows have been in service for 30-40 years.

My roof pitch is X degrees. Can I install a roof window?

You can install a roof window on roofs with a pitch of between 15 and 90 degrees. This covers the vast majority of sloped roofs in Europe.

What type of flashing should I use?

You should choose the type of flashing which corresponds with the type of roofing material on your roof, i.e. flashing type SFX for flat roofing material up to˙16 mm (typically slates), flashing type TFX for roofing material˙between˙16 - 50˙mm (typically tiles) and flashing type UFX for roofing˙materials between 16 - 120 mm˙(monastery tiles).


Our roof windows can be used with the most commonly used European roofing materials, e.g. concrete, ceramics and metal, with a profile height of up to 120 mm.

Which size should I choose?

That depends on the function and orientation of the room, the size of the floor space, and of course your personal preferences. Generally, we recommend that rooms used during the day should have more light than bedrooms. Furthermore, you should take into consideration that roof pitches facing south generally get more light than those facing north due to the orientation of the sun. As a general rule, you should have a combined glazing area of at least 10% of the floor area.

How high should I install the roof window?

You should position the window so that it best meets your needs, providing you with an unobstructed view of the outside when sitting down together with ease of operation. Depending on the roof pitch, this is normally between 90 and 130 cm.

Can I install a roof window in all types of rooms?

Yes. You can install it in all types of rooms, including living rooms, bedrooms and bathrooms. The room must be heated! For rooms with high humidity, ensure adequate ventilation and be prepared to re-lacquer wooden roof windows when needed, or choose a white PVC window, which better resists humidity.

What type of wood is the roof window made of?

The roof window manufactured using of kiln-dried Nordic pine wood sourced from sustainable forests.

Can I get different colours of flashings?

Our flashing is available only in umber grey, which is the colour most suitable for all roof types and is is also the colour used by most roof window manufacturers in Europe. In some markets you can also buy black flashing, which is designed for the conservation windows. The covering elements of the conservation windows are also black.

Is it possible to buy a special size of roof window?

Most European roof windows are standardized to fit all kinds of roofing design, making it unnecessary to pay extra to have a special size of roof window.


Only our flashing is compatible with our windows.

I would like to buy a blind for my roof window. How can I select the right size?

Check the type plate of the window.