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Window adjustment for winter and summer: year-round comfort
Learn how to easily adjust PVC windows for winter and summer — improve the seal, reduce heat loss and keep your home comfortable all year round.
Published: March 23, 2026
12 min read
Window adjustment for winter and summer: year-round comfort
Did you know that many modern PVC windows have a hidden feature designed to adapt to Lithuania's changing seasons? It's seasonal adjustment — a simple mechanism that lets you change how firmly the window gasket is pressed.
Done twice a year, this small adjustment is an effective way to improve home comfort, increase energy efficiency and even extend the life of your windows. In this guide we explain the principle behind winter and summer modes, how to adjust the windows yourself and when it's time to call a professional.
1. The "two seasons" principle: why adjust windows?
The goal of seasonal adjustment is to make your windows work smarter — not harder — in both cold and warm weather.
Goal in winter: maximum heat retention. Setting windows to "winter mode" increases the sash's pressure against the rubber gaskets.
Benefits: a better seal, lower heat loss, lower heating bills and no drafts.Goal in summer: better airflow and less load. Switching to "summer mode" reduces gasket pressure.
Benefits: easier operation, better micro-ventilation, less strain on gaskets and a longer service life.
2. DIY guide: how to adjust windows by season
Adjusting windows is simple — it takes just a few minutes:
Find the cams — open the window and look at the side of the sash.
Check the marking — the closer the marker is to the gasket, the tighter the seal.
Winter mode — turn the cams towards the room to increase pressure.
Summer mode — turn the cams towards the outside to decrease pressure.
Check tightness — use the sheet-of-paper test.
3. When do you need professional help?
Contact a specialist if:
The window frame is deformed or damaged.
Even with winter mode set, you still feel a draft.
The handle, hinges or lock are sticking.
The window is out of adjustment and operates with difficulty.
This simple twice-a-year procedure helps keep your home comfortable and reduces energy costs.
Conclusion: adjust your windows and save
Winter and summer window adjustment isn't just about convenience — it's a smart way to save energy and money. A few turns can ensure a warm, sealed home in winter and comfortable ventilation in summer.
👉 If you'd rather have professionals handle everything, book a window adjustment service here: https://langu-remontas.lt
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Window Repair Across Lithuania – Choose Your City
We work in all major cities, their districts and surrounding towns
Window Repair Across Lithuania
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.
Window Repair in Vilnius
Window Repair in VilniusWe 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.
Window Repair in Kaunas
Window Repair in KaunasWe 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.
Window Repair in Klaipėda
Window Repair in KlaipėdaIn 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.
Window Repair in Šiauliai
Window Repair in ŠiauliaiWe 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.
Window Repair in Panevėžys
Window Repair in PanevėžysIn 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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Frequently Asked Questions
Everything you need to know about our window and door repair services
- Yes, the initial inspection and our technician's visit to assess the work are completely free. No hidden fees and no obligations. If you decide to go ahead, the technician will prepare a clear quote on the spot, explain everything to you and, if you agree, can usually do the work right away during the same visit.
- Of course. We provide a warranty both for the work carried out and for the materials used, in line with the laws of the Republic of Lithuania.
- The price depends on the type of window, the issue, and the materials needed. When the technician arrives, they give you an exact quote on site with no hidden charges, and you decide yourself whether you want to proceed with the repair.
- Yes, our window service operates all over Lithuania: in Vilnius, Kaunas, Klaipėda, Panevėžys, Šiauliai and other cities and towns.
- Booking a free visit is very simple. Just give us a call or fill in the online booking form – in both cases it only takes a few minutes.
- In most cases repair is enough: replacing seals or mechanisms, improving insulation, adjusting the fittings, cleaning and lubricating the hardware. This is usually much cheaper than installing brand new windows.
- Repair is cheaper, because you don't have to buy new windows, remove the old ones, dispose of them or redo the interior finishes afterwards. Repair saves both time and money and is significantly more cost‑effective.
- We work with all major brands: Rehau, Veka, KBE, Schüco, Salamander, Aluplast and many others. Our technicians are trained to work with the specific mechanisms used by each manufacturer.
- Yes, you can pay by all major bank cards, by bank transfer or in cash. Payment is made after the work is completed.
- Yes, we provide services all year round. In winter we use specific methods so that the room doesn't get cold during the work and your comfort is kept to a maximum.