How to hang blinds on a plastic window
It is not always convenient to use curtains. In some cases, blinds are more practical and more convenient. They make it possible not only to protect yourself from indiscreet glances in the evenings, but also to regulate the level of illumination during the day by turning the slats (plates). We will talk about how to install blinds on plastic windows in this publication.
The content of the article
Designs and methods of installation
There are two types of blinds for windows - vertical and horizontal. Vertical lamellas are usually made of plastic or special dense fabric, cut into strips 10-15 cm wide. Less commonly, you can find lamellas made of aluminum or synthetic threads.
Lamellas of horizontal blinds are plastic, wood and metal. Regardless of the type and material, they consist of cornice and lamellas. Cornice - a plastic or aluminum U-shaped section in which the controls are located and to which the lamellas are suspended. Lamellas are horizontal or vertical stripes / plates that actually cover the opening. In order to be able to open and close the blinds, there are controls - chains or threads.
In horizontal models there is also a control rod associated with a rotary mechanism. By rotating the rod, the angle of inclination of the lamellas is changed. This is how you can change the amount of light and the "transparency" of the window. If the slats are placed vertically (almost), they completely block the view. In a horizontal position, they almost do not interfere with the view, but there are many other positions.
When installing blinds, you need to attach the cornice. To fix it, specially designed brackets are included in the kit. These brackets are attached to a window or wall, and the cornice is simply put on them (until it clicks).
There are several ways to install blinds on slab windows:
- Directly on each casement. This installation method will allow you to use the window sill at any time. The only limitation is that you cannot place objects close to the frame. Many are afraid of the need to make holes in the PVC profile with this installation method. The presence of several additional holes in the plastic does not affect the properties of the window. Besides, blinds can be attached to the opening sash without drilling.
- Fasten in the opening so that only the window is closed, but not the adjacent walls. With this method of installation, the cornice is attached to the upper slope.
- Fix to the ceiling. At the same time, there should be enough space to open the sash (at least 5 cm).
- On the wall.
- Attach the curtain rod directly to the wall above the window.
- Install on optional long brackets. This option is suitable for shallow window openings when blinds hanging close to the wall do not allow the sash to open.
The method of installing the blinds will have to be determined even before the purchase: the size of the canvases depends on this. So the type of installation must be selected before measurements.
We carry out measurements
It is necessary to decide on the type of blinds (horizontal, vertical) and the method of their installation (on the wall, ceiling, in the window on the sash, in the window opening) before buying. And even until the moment you start measuring.Because different installation methods require different sizes. Only with correct measurements will it be easy to install blinds on plastic windows.
Another important point: you need to measure each window separately... Sometimes it just seems that they are exactly the same. Believe me, there is a difference. And the measurement results must be recorded and signed, which specific window you measured and which sash it is. Accurate and detailed records will help avoid confusion when purchasing and installing.
Into the window opening
Although the appearance of the products is different, when measuring there is no difference between horizontal and vertical models. If you are going to install blinds in a window opening, it is necessary to subtract 2 cm from its width on each side. It is possible to subtract 1-3 cm from the height of the opening. Such gaps are needed so that the canvas hangs freely in the opening and the lower edge of the lamellas does not rub against the windowsill.
Please note that it is possible to install blinds on plastic windows "in the opening" not flush with the edge of the opening, but deeper - at the glass itself or by stepping back 5 or more centimeters from the edge. If the opening has a trapezoidal shape, the height / width of the opening will be less for the glass, so we carefully measure. And yet, in this case, it is better to put marks for installation even when measuring. Then you will know exactly where you will need to install the blinds on plastic windows so that their dimensions fit perfectly.
Ceiling or wall
Here measurements depend on your desires. The length of the blinds can be up to the floor or only up to the windowsill. Moreover, depending on the type of installation chosen, the lamellas can cover the windowsill or not. So the length is whatever you like best.

This is wall mounting. When mounted on the ceiling, the length will increase., And how much - you choose
The width of the blinds with this installation method is wider than the window opening. How much wider depends on your desire, but the minimum entry is 5 cm on each side. But if the window is in the same plane with the wall surface, you will need additional brackets, which are not included in the package: the lamellas must be spaced at least 5 cm from the glass surface so that they do not interfere with the opening of the sash for ventilation.
On sash
When installing blinds on a multi-sash window, there are two options - to put one device on each sash or order one long one for the whole window. Usually the first option is chosen - it makes it possible to open and close the sashes when the blinds are lowered. If you choose this installation method, you will need to measure each leaf and record the results. The flaps can be different, so be careful.
The width of the blinds when installed on the sashes is taken 3 cm wider than the glass. When hanging, the lamellas are 1.5 cm over the profile. It is convenient and does not interfere with opening / closing windows. The length depends on the mounting location, but usually it is 5 cm longer than the glass height.
Once again, we draw your attention: we measure each sash!
How to install blinds on plastic windows: attach to a wall or window opening
The first step is to apply the markings. We install brackets in the cornice. We place them on the right and left so that they do not interfere with the operation of the blinds. The installation height depends on the selected product length.
We apply curtains, mark with a pencil on the wall the places for installing fasteners in the brackets. If we are installing horizontal blinds (they are light and hardly create loads), it is enough to put one screw / dowel each. Vertical ones are heavier, so you need to install all the fasteners from the kit.

Installation of blinds on the ceiling and walls is the same. Only the place where the bracket is attached changes
There is also a second way. Draw a horizontal line at the selected level using the building level, try to avoid tilting - this will affect the blinds (skew).Attach the bottom of the bracket to this line, using a pencil to mark through the holes for drilling. If the length of the eaves is more than 2 m, an additional bracket is needed to increase the rigidity of the structure, which is fixed in the middle.
When fastening to brick or concrete, we drill holes in the wall or ceiling at the marked points. Drill or hammer drill - who has what in stock. The drill diameter depends on the size of the dowels. They usually come in a set, but you can put your own.
We insert expansion dowels into the finished holes, carefully hammer them in with a hammer. We put the brackets, fasten them with screws or nails (if using a dowel-nails). We install the cornice on the brackets, insert the plugs on the sides. For horizontal blinds, attach a rod (handle) to control the swing mechanism. To do this, directly into the mechanism itself, install a special hook (included), attach the tip of the rod to this hook.
Installation of horizontal blinds on PVC window sashes
With this method of installation, the blinds are attached with small self-tapping screws (included) to the window profile. Install them so that they do not interfere with the handle to turn. Be careful: if you drill too close to the glazing beads, you can damage the glass unit. Therefore, in this case, correct measurements are very important.
Installation step by step
The procedure is as follows:
- We install the mounts on the cornice so that they do not interfere with the moving parts inside.
- Trying on the product on the frame. We expose it so that the lamellas go to the drain frame and to the right at the same distance.
- We mark with a pencil or marker the place where the fasteners should be located. During this operation, you must keep the cornice as even as possible. You can navigate along the contours of the window frame or use a level.
- Although the plastic is quite soft and you can immediately screw self-tapping screws into it so that the frame does not crack, it is better to pre-drill the holes. The drill diameter is slightly less than the diameter of the screws. Usually self-tapping screws with a diameter of 3 mm are included in the kit, so the drill should be taken by 2 mm or 2.5 mm.
- We take the brackets, fasten them with screws to the frame.
- We insert the curtain of the blinds, pressing until it clicks.
- We close the ends with the plugs that come with the kit.
Having to drill holes in a window frame can be daunting, but that's okay. In the case of improperly made holes, unsuccessful ones can be filled with sealant. White silicone, not acrylic (acrylic turns yellow quickly). The characteristics of the windows will not be affected. What could be dangerous - getting into a glass unit. Then it can crack. But this is not fatal - it can be replaced, although it will not be cheap.
We put the lower clamps
But that's not all. To finally install horizontal blinds on plastic windows, you need to drill a couple more holes - for the clips (also called antiwind). These are additional fasteners at the bottom of the opening sash of the window. The lower edge of the blinds is tucked into them. They do this so that when airing the blinds do not hang down, do not dangle from the wind and do not knock objects on the windowsill.
We put the clamps as follows: we try on, pulling the blinds down a little, mark the places of fasteners, drill holes, install. We fill the lower bar into the installed clips. Now, even with a draft or an open sash, the blinds will not dangle. The only thing to watch out for during installation is not to fall into the glazing bead (this is a long bar that goes along the glass unit and holds it). It is necessary to drill a hole in the frame itself, stepping back at least 1 cm from the edge. The rest is no problem.
No drilling
There is also a way to install blinds on plastic windows and not drill the frame. This method is available only for those blinds that are hung on opening sashes.In this case, they are simply hung on the plastic mounts / brackets that slide onto the frame from above. To prevent them from moving, a strip of double-sided tape is attached to the back of the bracket. After removing the protective film, it can be glued (or not fixed).

The shape of the plastic fasteners depends on the type of cornice. So you need to select for each specially
These L-shaped plastic brackets are not included, but you can buy them from a store or from a firm that sells horizontal blinds. This method is convenient for simple dismantling of the blinds, which is convenient if they need to be repaired or washed.
Assembly of vertical blinds
The vertical blinds are installed in the same way as described above. The difference is that the lamellas are installed after the cornice is fixed (the guide along which the runners move). For convenience, before attaching the slats, you can turn the sliders with an adjustment cord so that the slots in them stand perpendicular to the cornice. Next, simply snap the slats into the sliders, inserting the strip until it clicks. So, in turn, we fix all the lamellas.
If the lamellas are made of fabric, then after installing them, do not forget to insert the lower weight. Next, we attach the lower connecting chain to the lamellas.
Installation of vertical blinds is complete.