Skip to main content

Draught Through Plastic Windows – What to Do?

Find out why cold air comes through plastic windows, how to restore the seal, and when professional window sealing or gasket replacement is needed.

Published: May 27, 2026
6 min read
Draught through plastic windows – what to do?

Draught Through Plastic Windows – What to Do?

Cold air coming through plastic windows is usually the first sign that they have lost their seal. Most people only notice the problem when temperatures drop and a draught appears near the windows, home comfort decreases, or heating costs start to rise.

The problem is most commonly related to worn gaskets, reduced window compression, or long-overdue window maintenance. Timely window sealing or repair helps reduce heat loss and avoids more extensive repair work in the future.

Why Is Cold Air Coming Through Plastic Windows?

Even high-quality plastic windows wear over time. Temperature fluctuations, humidity, sunlight, and constant opening and closing gradually affect window fittings and gaskets. As a result, the window compression becomes less effective than before and cold air begins to enter.

The most common causes of reduced sealing are worn window gaskets, reduced compression, or an unevenly pressing sash. In some cases, the problem arises from long-overdue adjustment or natural fitting wear.

How to Tell Your Windows Need Sealing

The first signs of reduced sealing usually appear gradually, so many people don't notice them immediately. The problem typically becomes apparent when temperatures drop or the heating season begins.

It is worth contacting professional technicians if you feel a draught near the windows, cold air is coming through, the glass is steaming up, or moisture is accumulating. Another common sign prompting people to seek window sealing in Klaipėda is higher heating bills or increased outside noise.

In these cases, professional plastic window sealing or gasket replacement is usually required.

Do You Always Need to Replace the Gaskets?

Not always. Sometimes the problem arises from reduced window compression or misaligned fittings. However, if the gaskets have hardened, cracked, or lost their elasticity, adjustment alone is usually no longer sufficient.

Professional technicians first assess the condition of the gaskets, the operation of the fittings, the window compression, and the overall seal. Only after diagnosis is it possible to determine accurately whether adjustment is needed or whether window sealing and gasket replacement are already necessary.

How to Reduce Heat Loss Through Windows

One of the most effective ways to reduce heat loss is timely plastic window sealing. In some cases, additional internal window sealing is carried out to reduce draughts and improve the overall seal indoors. Properly maintained and well-sealed windows reduce draughts, improve home comfort, and allow a more stable temperature to be maintained indoors.

Well-sealed windows also help reduce moisture accumulation and protect fittings from faster wear. In most cases, professional sealing costs considerably less than a later larger repair or new window installation.

When to Call a Professional

Although people sometimes try to carry out minor adjustment work themselves, incorrect fitting adjustment can further reduce the seal or damage the mechanisms.

Professional window technicians can accurately identify the cause of the problem and select the most suitable solution for the specific window system. In most cases, professional adjustment, gasket replacement, or additional window sealing is sufficient to restore the seal and smooth operation.


If cold air is coming through your plastic windows or the seal has deteriorated – book professional window sealing across Lithuania.

Related Articles

When window adjustment no longer helps — a technician explains when component replacement is needed

When Window Adjustment No Longer Helps

Adjusted the window twice and the draught is back? Adjustment has a limit — when a component is physically worn, no correction will hold for long. How a technician tells when adjustment is enough and when it is time for component replacement.

Read More
Technician inspecting window seals in an older Kaunas apartment block

Why Windows in Older Kaunas Apartments Need More Maintenance

Window condition in older Kaunas apartment blocks isn't set by building age alone — it depends on when each window was fitted, its hardware and its service history. Here's what to check first and when it's worth calling a technician.

Read More
Plastic door with handle — why the sash no longer stays closed

Why Plastic Doors Won't Stay Closed

Do your plastic or balcony doors fail to close, catch on the frame or not latch? Learn when adjustment is enough and when repair is needed.

Read More
Autumn view through a plastic window — time to check window condition before the heating season

Autumn Window Check: What to Inspect Before the Heating Season

Early autumn is the right time to check your windows before the heating season. Learn what you can assess yourself and when it is worth calling a technician.

Read More
New PVC windows can go out of adjustment — how to distinguish adjustment need from an installation problem

Why Do New PVC Windows Also Go Out of Adjustment?

A new window should work flawlessly — so when the sash starts catching the frame or the handle turns harder, it's natural to suspect a defect. But the need for adjustment alone doesn't mean the window is poor quality. Here's how to tell when adjustment is enough and when you should first contact the installer.

Read More
Condensation on plastic windows — water droplets on the room side of the glass

Why Do Plastic Windows Fog Up? When It’s Normal and When to Worry

Waking up to water droplets on the window? It doesn’t always mean the window is broken. We explain when condensation is normal — and when it’s a warning sign.

Read More

FREE DIAGNOSTICS AND TECHNICIAN VISIT

We serve Vilnius, Kaunas, Klaipėda, Panevėžys, Šiauliai and all of Lithuania

Certified Technicians

Professional reliability you can trust

Work Done the Same Day

Quick response when you need it most

Guarantee

Up to 5 years

Transparent Prices

Competitive prices

Windows and Doors We Repair

We repair plastic and wooden windows and balcony doors throughout Lithuania. Aluminium window repair services are available in Vilnius and Kaunas.

Plastic window repair

Plastic Window Repair

Plastic window repair, maintenance, adjustment, sealing, hardware inspection and gasket replacement.

Wooden window repair

Wooden Window Repair

Wooden window sealing, hardware adjustment and restored smooth operation.

Aluminium window repair

Aluminium Window Repair

Aluminium window adjustment, repair and sealing — service available in Vilnius and Kaunas only.

Plastic door repair

Plastic Door Repair

Plastic balcony door adjustment, handle and holder replacement, door seal restoration.

What Our Clients Say

Real feedback from our satisfied customers

"Incredibly professional and fast service. The technician fixed our window in under an hour. Highly recommended!"

Stanislava Sta

"Great communication and transparent pricing. The quality of work was excellent. Very happy with the result."

Kymantas Vitkauskas

"The team was punctual, polite, and very knowledgeable. They explained the issue clearly and fixed it efficiently."

Samanta Medvedevaitė

"Fantastic service from start to finish. I will definitely use them again for any future window or door repairs."

Martynas Lukšys

Why Choose Us?

The advantages of working with our team of professionals

FREE Diagnostics & Visit

FREE Diagnostics & Visit

No-cost initial assessment to identify the problem.

Work Guarantee

Work Guarantee

We provide up to a 5-year warranty.

Fast Arrival

Fast Arrival

Our technicians arrive promptly to address your needs quickly.

On-Site Repairs

On-Site Repairs

99% of repairs can be completed during the first visit.

Tidy Work Area

Tidy Work Area

We respect your home and always leave our workspace clean.

All Profiles & Brands

All Profiles & Brands

We work with all types of window and door profiles and manufacturers.

Convenient Payment

Convenient Payment

Pay by card, cash, or we can issue an invoice.

Satisfied Clients

Satisfied Clients

Our goal is your complete satisfaction with our work.

0
Years of Experience
0
Projects Completed
0
Commercial Projects
0
Qualified Specialists

Meet Our Skilled Technicians

Expert professionals with years of experience

12 Years

Andrius

Senior Technician & Team Lead

Coordinates the team and ensures the highest quality of service

6 Years

Evaldas

Technician-Specialist

Ensures your windows and balcony doors operate smoothly

14 Years

Justas

Technician-Specialist

Ensures your windows and balcony doors operate smoothly

25 Years

Robertas

Technician-Specialist

Ensures your windows and balcony doors operate smoothly

5 Years

Martynas

Technician-Specialist

Ensures your windows and balcony doors operate smoothly

7 Years

Edgaras

Technician-Specialist

Ensures your windows and balcony doors operate smoothly

8 Years

Marius

Technician-Specialist

Ensures your windows and balcony doors operate smoothly

5 Years

Saulius

Technician-Specialist

Ensures your windows and balcony doors operate smoothly

4 Years

Denisas

Technician-Specialist

Ensures your windows and balcony doors operate smoothly

3 Years

Arūnas

Technician-Specialist

Ensures your windows and balcony doors operate smoothly

4 Years

Konstantinas

Technician-Specialist

Ensures your windows and balcony doors operate smoothly

Completed Window Repair Projects

See the quality of our work through real transformations

Nuotraukos kraunasi...

Glass Unit Replacement

Replacement of selective double and triple glazing units to improve energy efficiency or remedy glass breakage

Nuotraukos kraunasi...

Hardware Renewal

Complete mechanism renewal with modern hardware

Nuotraukos kraunasi...

Window and Balcony Door Sealing

Sealing the gaps between the window sill and the window frame to reduce heat loss and air leakage

Nuotraukos kraunasi...

Mechanism Cleaning and Lubrication

Complete mechanism replacement with modern multi-point locking system

Nuotraukos kraunasi...

Gasket Replacement

Replacement of old seals with polyurethane foam that remains stable and does not react to temperature changes, whether in winter or summer.

Nuotraukos kraunasi...

Hinge Replacement and Adjustment

Replacement of worn hinges and adjustment of window and door hardware to ensure smooth operation and a tight seal.

Do we cover your area? Check now

We work with

Original window parts only from trusted manufacturers — that's why we can offer up to 5 years warranty

Frequently Asked Questions

Everything you need to know about our window and door repair services

Usually due to worn window gaskets, reduced compression, or leaky window fittings.
Yes. In some cases, professional window adjustment helps restore adequate compression and reduces cold air ingress.
When they lose elasticity, start cracking, or the windows become draughty.
Yes. Well-sealed windows reduce heat loss and help maintain a more stable temperature at home.
Yes – and not just adjustment. We provide all our window service work in Klaipėda and the surrounding area. Read more: window repair in Klaipėda.
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.