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Poor Window Sealing – How to Keep Your Home Warm and Comfortable

Learn how to locate draughty windows and fix the problem. Tips, temporary solutions and professional repair for a warm and energy-efficient winter.

Published: March 9, 2026
15 min read
Poor window sealing – how to keep your home warm and comfortable

Poor Window Sealing – How to Solve the Problem?

As cooler autumn arrives in Poland, a small draught through a window can quickly become a source of discomfort and rising heating bills. Poor window sealing is one of the most common causes of heat loss in the home. It happens when the seals around the glass or frame wear out, letting cold air in and precious warmth escape outside.

Ignoring this problem means higher heating costs and a risk of moisture damage. This guide will help you locate the draughty spots in your windows and find the best solutions for a warm and energy-efficient winter.


1. How to Find the Draught: a Simple Diagnostic Guide

Before you start repairing, you first need to find the problem. Most air leaks are easy to detect by carrying out these simple tests:

  • Visual inspection – check for gaps, cracked seals or hardened rubber.

  • Hand test – close the window and hold your hand near the edge; if you feel cold air, you've found the leak.

  • Smoke test – light a candle or incense and watch whether the flame flickers. If it does, there is a draught.


2. Solutions: from Temporary Fixes to Permanent Repair

Temporary DIY solutions for minor draughts:

  • Draught-proofing tape – a quick and inexpensive way to reduce air flow.

  • Window insulation film – creates an additional layer of insulating air.

  • Draught excluders – help block air flow at the bottom edge.

Permanent solution – professional sealing and repair:

  • Condensation between the panes – indicates a damaged seal; the glazing unit must be replaced.

  • Worn seals – a specialist replaces them with new ones.

  • Damaged external sealant – the old sealant must be removed and new silicone applied.


Conclusion: a Well-Sealed Window Is a Worthwhile Investment

Don't wait for the first heating bills to see how much warmth you are losing through draughty windows. A small autumn repair can help avoid large winter expenses. Well-sealed windows mean comfort, warmth and lower energy bills.

If the seals are still in good condition but the window still lets in air, a seasonal window adjustment may be all that is needed. Not sure whether it is a sealing or adjustment issue? Professional window diagnostics can give you a clear answer.

If you would like a professional to carry out the sealing and repair work, book a window sealing and repair service here: https://www.naprawa-okna24.pl

Having a problem with your window or door?

Our technician will come, assess and fix it. Free call-out.

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Window and Door Repair Services

Professional solutions for all your window and door needs

Complete repair of fittings, hinges, handles, seals and glass units. PVC, aluminium and wooden windows.

From 50 zł

Precise 3D hinge and fitting adjustment. Restores tight seal and smooth operation without replacing parts.

From 50 zł

Straightening bent or deformed window and door frames. We restore correct closure without replacing the whole window.

From 170 zł

Hinge replacement, fitting repair, multipoint lock service and seal replacement for balcony doors.

From 50 zł

Perimeter and central window seal replacement. Eliminates draughts and heat loss.

From 20 zł

Full window inspection, adjustment and lubrication. Prevent costly repairs with preventive maintenance.

From 50 zł

Condensation between panes or broken glass? We replace sealed units without replacing the whole window.

From 225 zł

Roller replacement, track repair and HST drive service. Specialist in Schüco, Aluprof and Aliplast systems.

From 50 zł

Window or door stuck shut? We arrive without delay – no frame damage.

From 225 zł

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!"

Elżbieta Tarnowska

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

Piotr Kowalski

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

Marta Szymańska

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

Daniel Szymczak

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

up to 5-year guarantee on completed work. Manufacturer or supplier warranty on replaced components – depends on the specific part used.

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.

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.

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Frequently Asked Questions

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

Yes, the initial diagnostics and our technician's visit to assess the work are completely free. No hidden costs and no obligations. If you decide to proceed with the service, the technician will provide a clear quote on site, explain all the details, and if needed – can start work immediately and complete the repair during the same visit.

Absolutely! We provide a warranty for both the services performed and the materials used – in accordance with applicable regulations.

We cover all of Poland, with a particular focus on major metropolitan areas: Warsaw and surroundings, Kraków and Małopolska, Łódź area, Poznań and surroundings, Katowice and all of Silesia (Sosnowiec, Gliwice, Chorzów, Bytom, Zabrze, Tychy and 30+ cities). Call us – we'll call back within 15 minutes to arrange a visit.

The price depends on the type of window, the nature of the issue, and the materials needed. Upon arrival, the technician will provide an exact quote on site with no hidden fees, and you decide whether you want to proceed with the work.

Booking a free diagnostics is very simple. Just call our contact number or fill in the registration form – either way it only takes a few minutes.

In most cases, repair is sufficient: replacing seals or hardware, sealing, adjustment, cleaning and lubricating the mechanisms. This is a much cheaper solution than installing new windows.

Repair is cheaper because you don't need to buy a new window, remove the old one, dispose of it, or carry out finishing work after installing a new unit. Repair saves both time and money, being a significantly more cost-effective solution.

We service windows from all major manufacturers, including: Rehau, Veka, KBE, Schuco, Salamander, Aluplast and many others. Our technicians undergo training on the specific mechanisms of each manufacturer.

Yes, we accept all major payment cards, bank transfers and cash. Payment is made after the work is completed.

Yes, we provide services all year round. During winter, we carry out window servicing using special methods to avoid cooling down the rooms and ensure maximum comfort.

Balcony door adjustment for PVC or aluminium doors starts from 80 zł. It includes precise 3D adjustment of hinges and fittings, eliminating sagging, draughts and closing issues. Free on-site diagnostics – the technician will quote on arrival.

Yes. We specialise in sliding and HST terrace door service for all major systems: Schüco ASS 70/77, Aluprof MB-77 HS, Aliplast Imperial. We replace load rollers, repair tracks, adjust closing pressure and service drive mechanisms. From 150 zł.

A window ventilator (trickle vent) is a ventilation device fitted in or above a window frame, providing a constant supply of fresh air without opening the window. Since 2021 (Polish building regulations WT 2021), ventilators are mandatory in new buildings. We install pressure-controlled, humidity-sensitive and acoustic ventilators – from 80 zł each.

After your enquiry we call back within 15 minutes and agree a time. In most cities (Warsaw, Katowice, Łódź, Poznań, Kraków) a technician arrives the same or next working day. For urgent cases such as a fallen hinge or jammed door, we aim to arrive within a few hours.