Find out when window gasket replacement is needed, how to spot worn seals, and why faulty window rubber increases heat loss in your home.
Window gaskets are one of the most important components for airtightness, yet most people only give them a thought when cold air starts seeping through the windows or damp begins to appear. Over time, even high-quality uPVC window gaskets lose their elasticity, begin to wear, and can no longer maintain the correct compression against the frame.
Faulty window gaskets increase heat loss, reduce comfort in the home, and can eventually cause additional problems related to damp or mould.
The first signs usually appear gradually. Initially you may notice a slight reduction in airtightness, a faint draught, or increased condensation around the window frame.
Over time the problem becomes more noticeable. Cold air starts to penetrate, the glazing may begin to mist up, and it becomes harder to maintain a consistent temperature indoors.
The most common signs:
worn or hardened gaskets,
visible cracks in the seals,
reduced airtightness,
increased heat loss,
moisture build-up around the windows.
uPVC window gaskets are constantly exposed to temperature fluctuations, moisture, UV radiation, and mechanical stress. For this reason, the rubber gradually loses its elasticity and can no longer press firmly against the frame.
Accelerated gasket wear is most commonly caused by long-term neglect of maintenance, heavy use of the windows, incorrect adjustment, or extreme temperature changes. In some cases, poor-quality window sealing rubber is also to blame.
Regular window maintenance helps keep the gaskets in good condition for longer and reduces the likelihood of more serious problems in the future.
Gasket replacement is usually required when the seals have lost their elasticity or can no longer provide adequate airtightness. In some cases, adjustment alone is no longer sufficient and the sealing rubber itself must be replaced.
A professional diagnosis makes it possible to determine precisely:
whether the problem lies with the gaskets,
whether additional adjustment is required,
whether preventive maintenance is sufficient.
Timely window gasket replacement often costs considerably less than more extensive repairs or full window replacement.
Window adjustment is intended to restore the correct operation of the hardware and the clamping pressure of the sash. Gasket replacement, by contrast, is focused on restoring airtightness.
In some cases the problem can be resolved by adjusting the hardware alone, but when the gaskets are worn, professional gasket replacement is also required.
For this reason it is important to accurately identify the cause of the draught before any work is carried out.
Yes. High-quality window sealing gaskets help reduce heat loss, improve airtightness, and eliminate draughts. Properly maintained uPVC window gaskets also protect against moisture build-up and extend the service life of the windows themselves.
In most cases, professional gasket replacement prevents more serious problems in the future and helps to maintain a comfortable temperature in the home.
The cost of replacing uPVC window rubber depends on the condition of the windows, the type of gasket, and the scope of work required. In most cases, professional window gasket replacement costs considerably less than more extensive repairs or a full window replacement.
An exact price is determined after a window inspection and airtightness assessment. Timely uPVC window rubber replacement helps reduce heat loss and keeps the windows in good condition for longer.
If your windows have lost their seal or cold air is coming through — book a professional window sealing and gasket replacement service across Lithuania.
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Ensures your windows and balcony doors operate smoothly
Technician-Specialist
Ensures your windows and balcony doors operate smoothly
Technician-Specialist
Ensures your windows and balcony doors operate smoothly
Technician-Specialist
Ensures your windows and balcony doors operate smoothly
Technician-Specialist
Ensures your windows and balcony doors operate smoothly
Technician-Specialist
Ensures your windows and balcony doors operate smoothly
See the quality of our work through real transformations
Replacement of selective double and triple glazing units to improve energy efficiency or remedy glass breakage
Complete mechanism renewal with modern hardware
Sealing the gaps between the window sill and the window frame to reduce heat loss and air leakage
Complete mechanism replacement with modern multi-point locking system
Replacement of old seals with polyurethane foam that remains stable and does not react to temperature changes, whether in winter or summer.
Replacement of worn hinges and adjustment of window and door hardware to ensure smooth operation and a tight seal.
We work in all major cities, their districts and surrounding towns
We provide window repair services across Lithuania – working in all major cities, their districts and surrounding towns. We perform plastic window repair, window fixing, window adjustment, window sealing and gasket replacement, ensuring tightness and long-lasting results.
👉 In about 99% of cases we solve the problem on the first visit, and the technician's call-out and full window diagnostics are free of charge.
We perform window repair in Vilnius throughout the city and Vilnius district – in Antakalnis, Fabijoniškės, Pašilaičiai, Pilaitė, the city centre and other Vilnius districts as well as surrounding towns. We solve sealing, adjustment and mechanical issues, carry out plastic window repair and glass unit replacement. We also provide window adjustment and window sealing.
👉 Most often we handle everything on the first visit, and the call-out and window inspection cost you nothing.
We perform window repair in Kaunas and Kaunas district – working in Šilainiai, Dainava, Eiguliai, Žaliakalnis, the city centre and other districts as well as surrounding towns. We fix leaking, stuck or misaligned windows, carry out plastic window repair and gasket replacement. We also provide window adjustment.
👉 In about 99% of cases we solve the problem on the first visit, and the technician's call-out is free of charge.
In Klaipėda we perform window repair throughout the city and Klaipėda district – both in the city itself and in Gargždai and other surrounding towns. Due to the coastal climate, window sealing and window adjustment are often needed, so we help restore window tightness, eliminate drafts and improve home comfort.
👉 We come out free of charge, assess the situation on site and most often solve the problem right away.
We provide window repair services in Šiauliai and Šiauliai district – working in Dainiai, Gytariai, Lieporiai, the city centre and other districts as well as surrounding towns. We carry out plastic window repair, window adjustment and window sealing, quickly resolving both minor and more complex faults.
👉 Most often we handle everything on the first visit, and the call-out and diagnostics are free of charge.
In Panevėžys we perform window repair throughout the city and Panevėžys district – working in Kniaudiškės, Rožynas, Pilėnai, the city centre and other districts as well as surrounding towns. We carry out plastic window repair, window adjustment and gasket replacement, ensuring quality and long-lasting results.
👉 We come out free of charge and most often solve the problem on the first visit.
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