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Window installation – Polish vs Irish methods

Written by

Maja Białas

Reading Time: 6 minutes

Did you know that even the best frames can fail to perform if installed incorrectly? They play a crucial role in the overall performance of a home, contributing to its energy efficiency, comfort, and appearance. Whether you’re replacing old models or planning a new window installation, the method used can make all the difference. At Fenbro, we’ve honed our installation techniques to create results that stand out from those offered by most local fitting teams. A properly installed frame not only enhances the look of your property but also ensures long-term performance and cost savings.

In this article, we’ll explore what it takes to achieve excellent installation, compare Polish and Irish techniques, and show how advanced methods like warm assembly are setting new standards. Ready to discover how to make your space warmer, more efficient, and beautiful? Let’s get started!

How ideal window installation should look like?

A perfect window installation requires precision and attention to detail at every step, from accurate measurements to flawless finishing touches. Done correctly, whether for Polish windows or Irish windows, it enhances energy efficiency, durability, and the overall comfort of your home. Here are the steps to achieve it:

1. Proper measurements

To guarantee a perfect fit, precise dimensions of the frame are essential. Using tools like a tape measure and spirit level, the frame should be checked both internally and externally, ensuring all angles are square. Properly taken measurements eliminate the risk of misalignment.

2. Removing the old window

Careful dismantling of the existing structure is key. This involves breaking the seal of any paint or caulk, detaching trims, and removing the frame and fittings. All debris must be cleared, leaving a clean and prepared opening.

3. Preparing the window opening

The space should be thoroughly cleaned to remove any remnants of insulation, dirt, or crumbling plaster. Priming and moistening the surface enhance the adhesion of sealing materials and prevent heat loss through thermal bridges.

4. Mounting the window

The new frame must be positioned precisely within the opening, aligned both vertically and horizontally. Using a level ensures smooth functionality and optimal performance for years to come.

5. Securing the window with anchors

Anchors or dowels should be used to stabilise the frame, with placements near the corners for balanced support. This step provides the necessary structural integrity for daily use and external pressures.

6. Sealing the window

Applying high-quality polyurethane foam around the frame seals any gaps, creating a barrier against air and water infiltration. Effective insulation is crucial for maintaining energy efficiency.

7. Installing the inner window sill

The sill must be carefully cut and attached to fit perfectly. It should extend slightly beyond the frame, be secured with adhesive, and sealed to ensure a neat and durable finish.

8. Finishing touches

The window reveals should be smoothed, and all joints sealed with silicone. These finishing touches enhance both the appearance and longevity of the installation.These steps will ensure a high-quality window installation. Whether you prefer to handle it yourself or leave it to the expertise of our professional fitters, we’re here to support you every step of the way. Are you interested in more details? Read this article.

 

Window replacement – Polish vs Irish methods

Replacing windows is a complex process that requires precision and attention to detail to ensure optimal functionality and insulation. However, the methods employed in Ireland often fall short compared to the thorough, detail-oriented approach used by Polish professionals.

Irish methods: common mistakes

In Ireland, affordable window replacement is frequently carried out with speed rather than precision, resulting in several technical and aesthetic shortcomings. One of the most significant issues is the lack of proper insulation materials, such as mounting foam. Instead, gaps around the window are frequently left unsealed or hastily covered with plastic trims, which offer little to no thermal insulation. This leads to increased energy loss and leaves homes susceptible to draughts and moisture infiltration.

Many Irish companies skip essential steps in window installation services, like using mounting foam or properly insulating beneath the sills,” says Marcin Wojtyczko, our experienced fitter. “They often cover gaps with plastic trims or leave old, misaligned frames in place, which compromises both the insulation and the functionality of the window. Even the best window can’t perform as it should if these basic principles are ignored.

Another recurring issue is the handling of internal window sills. Instead of replacing them to allow for proper insulation, many Irish companies simply trim the existing sills to fit. This creates gaps beneath the sill that remain uninsulated, reducing the overall effectiveness of the window. Even a perfectly sealed window cannot perform optimally without proper insulation in these areas. As Marcin highlights, on the exterior, silicone sealing is typically applied quickly and unevenly, resulting in an untidy appearance and reduced resistance to weather conditions. Additionally, some installers fail to use spirit levels, opting to mount new windows directly onto old, misaligned frames. This practice means that if the original window was improperly installed, the new one inherits the same flaws, leading to operational problems and compromised performance.

Polish methods: attention to detail

In contrast, Polish installers follow a meticulous process to ensure that the new window not only fits perfectly, but also functions efficiently for years to come. One of the key differences is the emphasis on creating a new level during installation. This step involves correcting any misalignments from the previous window and ensuring that the new frame is perfectly straight, even if it requires additional preparation and finishing work.
According to Marcin, Polish professionals also prioritise insulation at every stage. Internal window sills are always replaced during a window replacement project, allowing for proper insulation beneath the sill. High-quality mounting foam is applied around the frame to seal gaps and prevent heat loss, and external sealing is done carefully to ensure both functionality and aesthetics.

Why Polish methods stand out?

The Polish approach prioritises long-term performance over quick fixes. Fitters focus on proper alignment, meticulous insulation, and flawless finishing. This enhances both the energy efficiency and visual appeal of the property. Their attention to detail ensures that every window replacement is more than just a replacement. It becomes an upgrade. Homeowners enjoy greater comfort, lower energy costs, and a refined, professional finish. One of the standout features of Polish installers is their use of warm assembly techniques, a modern and highly effective approach to window installation that maximises insulation and minimises heat loss.

 

Warm assembly: a game-changer for new builds

Warm assembly, also known as “thermal installation,” is a modern window installation method designed to maximise energy efficiency and minimise heat loss. It involves using specialised materials and techniques to create a complete thermal barrier around the window, preventing draughts, moisture, and thermal bridges—those weak spots where heat escapes. In simple terms, warm assembly ensures that windows not only look good but also help keep your home warm in winter, cool in summer, and energy-efficient all year round.

Warm assembly in Ireland: limited and inconsistent

In Marcin’s opinion, in Ireland, warm assembly is often simplified to the use of basic mounting foam and internal vapour-permeable tapes. While these materials are a step in the right direction, they are typically insufficient for achieving true thermal efficiency. Many installers use generic foams that lack durability, thermal resistance, or anti-fungal properties, which compromises the long-term performance of the installation.Furthermore, Irish installers rarely use external vapour-permeable tapes or advanced products like expanding tapes and warm sills. This incomplete approach leaves gaps in insulation, allowing heat to escape and reducing the effectiveness of the window installation.

Warm assembly in Poland: a comprehensive approach

Polish warm assembly is far more precise and effective. It starts with selecting high-quality materials tailored to the specific needs of the project. The use of premium mounting foam guarantees exceptional insulation, long-lasting durability, and resistance to moisture and aging. This material meets strict European standards and ensures a long-lasting seal.The Polish method also includes internal and external vapour-permeable tapes, which prevent moisture while allowing the building to “breathe.” Expanding tapes are used to fill any gaps perfectly, and additional elements like warm sills and lintels eliminate thermal bridges around the window. Membrane tapes add another layer of protection, ensuring that every aspect of the installation contributes to superior thermal performance.

Why warm assembly matters?

Warm assembly significantly enhances the energy efficiency of a building by sealing off weak points where heat can escape. This method reduces energy bills, improves indoor comfort, and protects the structure from moisture damage. It’s an essential feature for modern homes, where sustainability and energy savings are increasingly important. Here you can read more about warm assembly.

The Polish advantage in new builds

Our Polish fitters excel at thermal installation because they combine expert techniques with the use of a full range of advanced materials. Their attention to detail ensures that every window is perfectly insulated, sealed, and aligned. Unlike simpler windows installation methods seen in Ireland, warm assembly provides a complete solution that meets the highest standards of thermal efficiency and durability.

 

Conclusion

Has this article helped you understand the key differences between Polish and Irish window installation methods? We hope it’s provided valuable insights into why Polish techniques deliver superior insulation, durability, and performance. By combining advanced materials with expert craftsmanship, Polish methods ensure windows are not just functional but truly transformative for your home. How often have you wondered,’’are there any window fitters near me’’? Contact us for a quote and bring the benefits of Polish precision and quality to your space today!

 

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