Window & Door Problems

Many window and door problems have recognisable symptoms, but the same symptom can have several different causes. This guide will help you recognise the symptoms, understand the causes and decide whether you can handle it yourself or are better off calling a professional.

In many cases the repair concerns a specific part—sash alignment, hardware, a gasket or the glazing unit—without replacing the entire window. The right decision depends on the actual condition of the construction, not on age or one symptom alone.

Why do windows and doors develop problems?

A window combines several systems and components that must work together correctly. With use, their condition and adjustment can change:

• Gaskets – can lose elasticity, deform or become damaged over time. Their condition is one of the things to check when investigating air leakage.
• Perimeter hardware – requires inspection and maintenance as it is used; worn or damaged parts may need adjustment or replacement.
• Sash geometry – affected by building settlement, temperature changes and the weight of the sash itself. Signalled by scraping against the frame or by the sash not closing.
• Glazing unit – over time the spacer bar seal can fail, leading to condensation between the panes.
• Handle mechanism – internal parts wear out from daily use.

How to identify which problem you have

Common symptoms and possible causes – use these as pointers for further diagnosis:

• You feel a draught when the window is closed → check possible sources of air leakage.
• The window won't close or has to be forced → check possible causes of closing problems.
• The handle spins without resistance → check possible causes of a freely spinning handle.
• Mist or fog between the panes → failed glazing unit (glass replacement).
• Condensation on the inner glass surface → most often indoor humidity and ventilation, not a window fault.
• Window squeaks when opening → check where the squeaking may come from.
• Balcony door scrapes the threshold → a heavy sash drooping.
• Window is hard to open → check possible sources of resistance.
• You feel cold near the window in winter → loss of airtightness (gaskets or compression).
• Sliding doors slide with resistance → dirty tracks or worn rollers.

Repair or replace – what to choose?

Repair and full window replacement address different problems. If the fault concerns adjustment, hardware, a gasket, handle or glazing unit, the existing construction can often be retained. Full replacement may be considered when:

• The PVC profile is permanently deformed (mechanical impact, fire or heat distortion).
• The profile is cracked, degraded or damaged in a way that cannot be safely remedied by repair.
• The sash is structurally damaged (e.g. a crack at the welded corner joint).

In most other cases – adjustment, gasket replacement, handle replacement or glazing unit replacement are a far cheaper and faster solution.

What can you try yourself before calling a professional?

Some basic tasks you can safely do yourself – all you need is a basic tool and a bit of care:

• Hinge lubrication – use a product and maintenance method suitable for the specific hardware system.
• Clearing drainage holes – on the bottom edge of the profile (usually covered with a plastic cap). When blocked, water collects and leaks indoors.
• Checking the gasket by feel – gently squeeze the rubber. Elasticity is only one clue; hard, cracked or permanently deformed gaskets require closer assessment.
• Paper test on a closed window – slip a piece of paper between sash and frame and close. Differences in resistance can be a clue, but this test does not diagnose the cause of an air leak.
• Wiping door tracks – remove dust, sand and fine grit. Dirt can increase resistance when the door moves.

When to call a professional

Some work requires experience and specialist tools – an incorrectly done adjustment can make the window worse or damage the mechanism:

• Handle spins without resistance – the handle, spindle and interacting hardware should be diagnosed.
• Sash scrapes the frame or threshold – the cause should be identified and the sash alignment, hinges and hardware checked.
• Condensation between panes – glazing unit replacement (precise dimensions required).
• Window won't close even after attempted adjustment – diagnostics of the perimeter mechanism.
• Noise or cracking when turning the handle – diagnosis of the hardware and interacting components.

Diagnostics are free – even if you decide not to go ahead with the proposed work, there is no cost.

Brands we work with

Regardless of the window or door manufacturer, we most often service wear-and-tear components that naturally degrade over time.

• VEKA, Salamander, Aluplast, Rehau – European PVC systems, among the most commonly found in Polish residential construction.
• Drutex, Oknoplast, MS Więcbork – Polish manufacturers found in newer residential developments.
• Schüco, Aluprof – aluminium windows and HST patio doors used in modern construction.
• Roto, Winkhaus, Maco, Siegenia – manufacturers of hardware and multi-point locking systems.
• Velux, Fakro – roof windows commonly installed in detached houses.

We use original spare parts or high-quality replacements — depending on the manufacturer and component availability.

How does our service work?

The service process is simple and transparent — six steps from first contact to warranty:

• Contact – fill in a short form or call us. We call back within approximately 15 minutes.
• Free on-site diagnostics – a technician arrives at the agreed time and assesses the condition on site.
• We explain the cause – we show you exactly what needs to be repaired.
• We present the cost – after diagnostics we provide an exact quote. No hidden fees.
• We carry out the repair – after your approval we complete the work, most often during the same visit.
• You verify the result – we test the outcome together. You receive a service report, a warranty on the work performed, and the manufacturer's warranty on original parts.

In which cities do we provide window repair and door services?

We provide window and door repair in Warsaw, Krakow and Katowice, as well as in many other Polish cities. See the full list of 120+ cities we serve →

How much does it cost to fix a window or door problem?

The cost depends on the source of the problem and the scope of work. After diagnostics we present the exact repair cost. We only start work once you approve. Standard work is usually a quick and economical solution.

You will find an indicative price list on a separate page. Book your free diagnostic visit – we will contact you within around 15 minutes.