Window Repair vs. Replacement: Costs & ROI in 2026

Servicing old windows is cost-effective for minor issues like adjustments, costing from approx. €35 to €115, but it's often a short-term solution. Installing new, energy-efficient windows, while initially more expensive (averaging approx. €580-€1,400 per unit in 2026), is an investment that, according to our analysis, pays for itself in lower heating bills by up to 30% annually, while permanently increasing property value. The surprising conclusion is that further investment in joinery older than 15 years is often a waste of money.

What Exactly is Window Servicing and What Does it Include?

Professional window servicing involves a set of maintenance and repair activities aimed at restoring the joinery's original functionality and airtightness. It's not a comprehensive renovation, but rather a "symptomatic treatment" designed to extend the window's life and improve its comfort of use. Most often, it includes adjustments, lubrication of hardware, and replacement of worn-out consumable parts.

Before we delve into costs, let's define a basic concept precisely:

What is basic window servicing?
This service involves adjusting the sash pressure against the frame, lubricating moving parts of the hardware (hinges, locks), and checking the condition of the seals. The goal is to eliminate leaks, problems with opening and closing, and to ensure smooth operation of mechanisms. Industry experts confirm that regular servicing every 2-3 years can significantly extend the lifespan of windows, but it won't stop their aging process.

How Much Does Professional Window Servicing Cost in 2026?

The cost of window servicing in 2026 depends on the scope of work and the degree of wear of the components. A simple adjustment of one sash costs around approx. €20-€35, but a full service package is more expensive. The table below presents the average prices of the most popular service offerings on the market.

We've checked it — here are the facts in a table that will clear up your doubts about potential expenses:

Note: The prices provided are indicative and may vary depending on the region, window manufacturer, and complexity of the repair.

Having trouble with draughty windows? Request a free quote and measurement from a Wingedas expert, who will assess whether servicing still makes sense.

When Does Window Servicing Stop Being Cost-Effective?

Window servicing ceases to be cost-effective when the total cost of regular repairs approaches the value of a new window, and yet we don't achieve improvement in the key parameter – thermal insulation. Our analysis shows that the critical age for PVC joinery is 15-20 years. After this period, the profile loses its properties, and the glazing technology is already outdated.

Here are 5 specific situations where investing in servicing is throwing money down the drain:

1. Permanent deformation of the frame or sash: If the PVC profile is bent or distorted due to sun exposure and temperature changes, no amount of adjustment will restore its airtightness. This is a structural defect that cannot be repaired.
2. Advanced corrosion of hardware: When mechanisms are so corroded that their replacement is impossible or would require dismantling the entire window, it's not worth the effort. The cost of replacing the entire hardware system can be up to 50% of the price of a new window.
3. Degradation of the glazing unit in an old window: Replacing just the pane in a 20-year-old window is pointless. Even a new pane, fitted into a leaky and "cold" frame, will not significantly improve the overall thermal insulation of the window.
4. Visible mechanical damage to profiles: Deep cracks, chips in the frame caused by, for example, incorrect installation of external roller shutters, disqualify the window from further use.
5. Desire for significant energy efficiency improvement: Old windows, even after the best servicing, will still have a high U-value (above 1.5 W/m²K). Modern windows achieve U-values below 0.8 W/m²K. This technological gap cannot be bridged by servicing.

What Are the Real Costs of Installing New Windows in 2026?

The real cost of installing new windows in 2026 is the sum of the product's price, the cost of dismantling old joinery, installing new ones (including "warm installation"), and plastering work. For a typical double-sash window measuring 150x150 cm, the total cost can range from approx. €580 for a basic PVC model to over approx. €1,860 for timber or aluminium windows with the highest parameters.

Customers most often ask about the overall expense, so let's break it down:

• Window price: Depends on material (PVC, timber, aluminium), number of panes (double or triple glazing), colour, shape.
• Dismantling cost: Usually approx. €25-€45 per unit.
• Standard installation cost: Approx. €45-€80 per linear metre of window perimeter.
• Warm installation cost: An additional approx. €10-€20 per linear metre compared to standard installation.
• Finishing and sills: Replacing sills and plastering reveals costs from approx. €70 upwards per window.

Example calculation (PVC window 150x150 cm, triple glazing):

• Window: approx. €510
• Dismantling: approx. €35
• Warm installation (6 linear metres x approx. €16/lm): approx. €95
• External and internal sill + finishing: approx. €115
• Total: approx. €755

Want to know the exact price for your home? Use our online window configurator and get an initial quote in 3 minutes!

Why "Warm Installation" is an Investment, Not a Cost?

Warm installation (also known as layered installation) is a window installation technique using three insulating layers: a vapour-permeable tape on the outside, polyurethane foam in the middle, and a vapour-tight tape on the inside. Although it is more expensive than standard installation by approx. 20-30%, it is an investment that prevents thermal bridges around the window – the main culprits for heat loss, moisture, and mould. Data unequivocally show that buying the best window without warm installation is a mistake that results in higher bills. This method aligns with EU energy efficiency standards and helps meet requirements like EN 14351-1.

The principle is simple: the outer layer protects against rain and wind, but allows water vapour to escape outwards. The middle foam provides thermal and acoustic insulation. The inner layer blocks moisture from the room from penetrating the insulation layer. Thanks to this, the connection between the window and the wall remains dry and "warm", which eliminates energy losses and the risk of wall mildew. Investing in warm installation pays for itself within a few heating seasons. Learn more about the benefits of warm installation in our guide.

How to Calculate Return on Investment (ROI) for New Windows?

To calculate the return on investment (ROI) for new windows, you need to compare the annual heating savings resulting from the replacement of joinery with the total investment cost. The return on investment occurs when accumulated savings equal the expenditure incurred. Our analysis shows that, at current energy prices, the payback period for a single-family home averages 7 to 12 years.

Here's a simplified formula and example:

Annual savings = (Annual heating cost before replacement) x (Percentage energy saving)

Payback period (in years) = (Total cost of window replacement) / (Annual savings)

Example:

• Total cost of replacing 10 windows: approx. €8,140
• Annual heating cost of the house before replacement: approx. €2,090
• Estimated energy saving thanks to new windows (Uw=0.75): 25%
• Annual heating saving: approx. €2,090 * 0.25 = approx. €520
• Investment payback period: approx. €8,140 / approx. €520 = approx. 15.5 years

This result can be significantly shortened with rising energy prices or by utilising available grants. For instance, many EU countries offer incentives for energy efficiency improvements. Furthermore, the calculation does not include intangible benefits: increased property value, improved acoustic comfort, and aesthetics.

Service or Replacement – Hidden Signals It's Time to Decide?

The decision between servicing and replacing windows is often postponed, but there are subtle signals that clearly indicate that further delay generates losses. Beyond obvious draughts, it's worth paying attention to less visible symptoms indicating the end of a window's lifespan. Industry experts confirm that a quick reaction to these signs helps avoid greater costs in the future.

Here is a complete list of 7 signals you cannot ignore:

1. Increased external noise: If you suddenly start hearing street traffic much more clearly than before, it's a sign that the seals have lost their damping properties, and the glazing unit itself probably no longer meets acoustic standards.
2. Micro-draughts detectable by hand: On a cold, windy day, move your hand along the edge of a closed window. If you feel even a slight cool breeze, it means there's a leak that can no longer be eliminated by adjustment alone.
3. Difficulty maintaining cleanliness: Old, dull, and scratched PVC frames become porous. Dirt penetrates their structure, and cleaning them back to their original appearance becomes impossible.
4. Condensation on the inside of panes in winter: Water vapour condensing on the internal surface of the glass (on the room-facing pane) is an alarming sign that the glazing unit has very poor thermal insulation. Its cold surface causes moisture from the air to condense.
5. Fading and discolouration of furniture near the window: Old panes do not have UV filters. If you notice that the floor, sofa, or carpet near the window are fading from the sun, it's a sign that the windows are not protecting your interior from harmful radiation.
6. Frequent, recurring problems with mechanisms: If a service technician has to adjust the same window every six months because it constantly "sags" or leaks, it means the problem lies in the construction of the sash or frame itself, and subsequent repairs are just temporary fixes.
7. Increased heating bills without other cause: If your heating costs are rising year after year, and your heating system is efficient and the house hasn't been insulated, the main culprit is most likely the windows. Most precious heat escapes through them.

What Mistakes Do We Most Often Make When Choosing Between Servicing and Replacement?

When making a financial decision about windows, it's easy to fall into the trap of short-term thinking. Focusing solely on immediate cost, rather than long-term consequences, is the most common and expensive mistake. Our experience shows that many homeowners regret trying to "resuscitate" old windows when the leakage problem returns with double force after two years.

Avoid these 5 costly mistakes:

1. Over-investing in old windows: The mistake of thinking "just one more repair and it will be fine." Summing up the costs of several services (e.g., 3 x approx. €95 over 4 years) often shows that for that amount, you could have already had half a new, energy-efficient window.
2. Ignoring the cost of lost benefits: Every year spent with old windows represents a real financial loss on heating bills. By sticking with leaky joinery, you lose hundreds or even thousands of euros annually. This is a cost that isn't visible in your wallet but is felt in your bills.
3. Choosing the cheapest service: Opting for a "handyman" for approx. €10 who will "tinker something" usually results in damaging the hardware or permanently misaligning the window. Professional servicing requires knowledge, experience, and appropriate tools, which comes at a price.
4. Comparing the service price to the price of the window itself (without installation): This is a common manipulation. When comparing expenses, you should set the cost of servicing (e.g., approx. €115) against the TOTAL cost of installing a new window (e.g., approx. €700), but remember the future savings generated by new technology.
5. Being guided by sentiment: "These windows have always been here and they're good." This is an emotional approach that has nothing to do with technical and economic facts. Window joinery technology has changed dramatically over the last 20 years, as have energy prices.

Unsure what to do? Let's talk! Our Wingedas technical advisors will assess the condition of your windows free of charge and help you make the best possible decision.

Read also:

• Which Windows to Choose for Your Home in 2026?
• Triple-Glazed or Double-Glazed Windows? 5 Shocking Facts
• Window Replacement – Cost and Advice 2026
• Window U-Value: What Does It Mean?
• Funding for Window Replacement 2026