DIY repair, adjustment and maintenance of plastic PVC windows

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Plastic windows are a rather complex and capricious element of housing construction, one can never exclude their breakdown or malfunction. Forewarned means armed, so we suggest that you familiarize yourself with the internal structure of plastic PVC windows, basic problems and preventive maintenance methods..

DIY repair, adjustment and maintenance of plastic PVC windows

What can break

The main element of a plastic window – a frame made of a plastic profile – can become unusable for various reasons: from a seam that has burst due to poor quality of welding and ending with contact with highly coloring liquids and solvents. Nothing can be done here – the frame will have to be changed. Considering that this is the cheapest part of the window, you can assemble a new one on its basis by removing other parts from the broken.

DIY repair, adjustment and maintenance of plastic PVC windows

A broken glass unit is a much less pleasant case. It must be changed immediately: since cracked glass reduces energy efficiency and sound insulation to 0%. We have already described the technique of replacing a double-glazed unit with our own hands: we tear off the glazing bead and insert a simple sheet of glass with distance slats until a new double-glazed unit is made.

DIY repair, adjustment and maintenance of plastic PVC windows

Opening hardware is the most difficult and delicate problem of any windows. Breakdowns occur due to a violation of the window installation system, “childhood diseases” of new models, “old age” and improper handling. It is these nodes that we will consider today..

DIY repair, adjustment and maintenance of plastic PVC windows

But first, let’s give you an important warning. Sweating and siphoning windows are not necessarily the result of internal breakdown. The first occurs if the window sill blocks the flow of hot air from the radiator, the second – from the drying out of the foam seam and the lack of its protection. Dynamic vibrations of the window under wind loads can also destroy the seal of the opening. The reason for this is the lack of direct fasteners through the frame, which is completely removable.

Sash adjustment

This topic is very hackneyed, but it is just as vast. It is necessary to regulate the windows, of course, immediately after installation and periodically during their operation, because the draft of the building is constantly making its own adjustments. However, there is nothing complicated in the adjustment, it all comes down to working with several nodes.

DIY repair, adjustment and maintenance of plastic PVC windows

First of all, we balance the window in the open position so that it remains stationary in any position of the sash. No matter how carefully the installers align the window, a blockage of the plane of 1–1.5 mm can still occur, which will lead to spontaneous swinging, especially if the sash is heavy. The upper canopy is attached to the frame with a long plate at its upper end. Where the hinge is turning, there is an adjusting screw for a slotted screwdriver or hexagon. By rotating it, you can pull the upper edge of the sash towards the frame, or vice versa – release it within 3-4 mm. Therefore, we put a rack level on top of the frame and get rid of the tilt.

DIY repair, adjustment and maintenance of plastic PVC windows

A similar mechanism is provided in the lower hinge. The hexagon screw is located on the side, its rotation presses the sash against the frame or moves it away from it in the range of 5 mm. Ideally, the sash should, as a whole, be pressed against the hinges as much as possible, otherwise the locking strips of the locking mechanism will rub against the frame.

DIY repair, adjustment and maintenance of plastic PVC windows

On the lower canopy, but from its upper end, there is another screw designed to adjust the overall height of the sash. Without unnecessary need, there is no need to raise or lower the window, unless there are no scuffs at the bottom end of the frame opening, or something interferes with free movement.

DIY repair, adjustment and maintenance of plastic PVC windows

And, finally, the sash rebate should be adjusted. In modern windows, locking pins and mushrooms have an eccentric rotation mechanism of ± 90 °. Due to the thermal expansion of the sash and frame, the position of the trunnions should be different in summer and winter periods of operation. It is necessary to adjust the pins on all three sides of the sash, not forgetting about the lower locks of the shtulp doors. A small screw located under the long plate of the upper canopy (scissors) is responsible for the density of the vestibule on the hinge side, which provides opening in the ventilation mode.

DIY repair, adjustment and maintenance of plastic PVC windows

DIY repair, adjustment and maintenance of plastic PVC windows

The density of pressing is checked experimentally – if you put any bill in a place of the frame free from the mechanisms, it should not easily be pulled out when the sash is closed. Do not forget that with each such check, the handle must be pushed down until it stops..

Feasible repair of plastic windows

It often happens that the breakdown is not in the hardware itself, but in the fastening of frame elements to the plastic profile and its embedded reinforcing elements. Because of this, the sash in the open position acquires a noticeable vertical backlash. You can eliminate such a defect:

  • complete replacement of the frame;
  • sealing holes in plastic with strong epoxy glue;
  • using larger fasteners.

Failure of rubber seals around the perimeter of the vestibule is also common. It is quite possible to replace them without removing the window: the old ones are pulled out of the installation groove, then new ones are inserted. Replacement should be carried out only at room temperature, when cornering, only the inner edge of the seal strip is trimmed so that the side is continuous.

DIY repair, adjustment and maintenance of plastic PVC windows

If the fittings are jammed at the sash, the location of the breakage should be determined. The principle of operation of the mechanism becomes completely obvious after removing the overhead strips around the perimeter of the window. All the fittings are nothing more than a system of longitudinal beads, following from the lock to the corners of the sash and fixed to the plastic with self-tapping screws. If you misunderstand the mechanism of the lock, you can make sure exactly which part of the fittings is jammed by moving heavy pliers.

DIY repair, adjustment and maintenance of plastic PVC windows

The most vulnerable parts of the fittings are the corner mechanisms and the fixing system of the frame. It is quite easy for failed parts to find a replacement, although it is better to change all the fittings entirely, after twisting the canopies and removing the sash.

Secrets of long and trouble-free operation

The main reason for the popularity of plastic PVC windows is their trouble-free operation during the entire service life: you do not need to paint or additionally seal the frames. The plastic remains almost unchanged even after a decade. Various types of glass units play an important role in the heat and energy saving of a building. However, there are a number of service rules that cannot be deviated from..

First of all, cleaning: compositions containing acetone, petroleum solvents, acids and alkalis are not suitable for washing frames and ends. Even a one-time use of such chemicals will lead, at least, to the drying out of the seals, and the appearance of indelible stains and streaks on the plastic is also possible. By the way, PVC absorbs well and irrevocably all kinds of dyes like berry juice – such contaminants must be removed immediately.

DIY repair, adjustment and maintenance of plastic PVC windows

As for the fittings, with each seasonal winter / summer adjustment, lubricate the moving mechanisms, periodically remove the protective linings and add grease to the hinge joints. It will not be superfluous to remove the handle from time to time and add a few drops of machine oil to the gap between the axle sleeve and the lock case.

DIY repair, adjustment and maintenance of plastic PVC windows

Finally, the window should be periodically subjected to a full periodic inspection, during which the quality of the embedding of the outer slope and the condition of the foam in the seal of the opening are assessed. If, when pressing on the frame, it lags behind the slope by more than 1 mm, it means that the installation system is broken, there is a threat of loosening or crushing the window. Over time, the hardware will fail, and the sash will jam – such violations should be eliminated immediately..

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