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How to Determine If Your Windows are Sealed?

A leaky window can be a nuisance in many ways. Not only does it lose its insulating ability, letting unwanted warm or cold air into the interior or outside, but it also creates air circulation, which can negatively affect health in bedrooms during winter. Additionally, unwanted air exchange can also hit the wallet, as the heating system works against heat loss, or the air conditioner has to work harder in the summer, consuming more electricity to cool the rooms. But how can you determine if your windows are truly sealed and how tight should windows actually be? There are several ways to perform a seal check on windows.

The Seal Check in Various Forms

For older windows, it pays to take a closer look. Are the seals still in good condition or have they become brittle? What is the impression of the frame? However, if the visual check indicates that the physical condition of the window is lacking, replacing the window should be considered in any case, as windows usually last several decades. Therefore, in this case, it is likely that the window does not meet current energy requirements.

Another way to check the tightness is to move a lit candle along the edges of the window. If the flame starts to flicker, this is a pretty sure sign that the window is leaky.

In the cold season, you can test the window’s tightness with the back of your hand. Moisten the back of your hand and run it along the window frame. You will notice that the window is leaky if the moist spot noticeably cools down.

Another simple method is the paper test. Simply take a sheet of paper, open the window and place the paper about halfway along the window frame. Then close the window and try to pull the paper towards you with the window closed. Ideally, you should not be able to pull the paper towards you. This means the window is sealed. If you can easily pull the paper through the closed window, this is a sure sign that the window is leaky.

If you have identified leaks, it is crucial whether they are small or large areas through which air can flow in and out uncontrolled. Smaller spots may be filled with sealing strips, so the costs are very manageable. However, for larger leaks on doors or windows, it is advisable to replace or purchase new windows.

Note: For large patio or balcony sliding doors, it may happen that the movable sliding elements are not correctly adjusted. The windows are then leaky, but they are not defective; they just need to be readjusted. Here, it is advisable to contact the person responsible for the installation.

If you want to entrust the tightness check to professionals, you can have the so-called Door-Blower Test or Differential Pressure Measurement Procedure carried out. Specialist companies create an artificial airflow from the outside and carry out measurements inside the building according to specific procedures. The costs for such a test start in the mid three-figure range and can be somewhat higher depending on the scope. However, the investment is certainly a good one, considering the already sharply risen energy costs and the expected further increase.

Whichever testing method you decide on is up to you. If the result indicates that your windows no longer meet today’s requirements, renovation in this area is hardly avoidable. You can get an overview of the possibilities at Oknoplast.

The best value for money is offered by uPVC windows. A selection can be found here. uPVC windows are known for their robustness and longevity. In addition, modern uPVC windows are particularly energy-efficient and can even be used in the particularly demanding passive house sector. Buying a uPVC window is an investment in the future, as they can be used for several decades without loss of efficiency. Moreover, it is possible to obtain uPVC windows online directly from the manufacturer.

Tip: The energy efficiency of a window is also characterized by a well-insulated frame. In general, every element of a house wall should be well insulated to avoid so-called thermal bridges.

Understanding the Role of Window Glazing in Energy Efficiency

While checking the seal of windows is crucial, understanding the role of window glazing in maintaining energy efficiency is equally important. Modern windows often feature double or even triple glazing, filled with inert gas like argon or krypton, to minimize heat transfer. This advanced glazing technology not only enhances the insulation properties of windows but also contributes to sound reduction and increases the overall comfort of your living space. If your windows are old or single-glazed, considering an upgrade to double or triple-glazed windows can significantly improve thermal efficiency and reduce energy bills. Additionally, look for windows with low-emissivity (Low-E) coatings that reflect infrared energy, keeping heat inside in winter and outside in summer.

The Significance of Proper Window Installation and Maintenance

Even the best-sealed and energy-efficient windows can fail to perform optimally if not properly installed or maintained. Ensuring that windows are correctly fitted and sealed during installation is vital to prevent leaks and drafts. Regular maintenance, such as checking for wear and tear on seals, cleaning tracks, and ensuring mechanisms work smoothly, can extend the life of your windows and maintain their energy efficiency. It’s also essential to address any issues, such as condensation between panes, which can indicate seal failure, promptly to avoid more significant problems down the line.

Innovations in Window Technology and Materials

Staying informed about the latest innovations in window technology and materials can provide additional options for improving energy efficiency. For example, windows equipped with smart technologies, such as thermochromic or electrochromic glass, can adjust their tint based on the intensity of sunlight, reducing the need for air conditioning during hot weather. Additionally, exploring alternative frame materials, such as fiberglass or composite, can offer superior durability, strength, and insulation compared to traditional materials. These advancements not only contribute to a more sustainable and energy-efficient home but also enhance the aesthetic appeal and increase the value of your property.

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