Windows that hold the heat in
Technical reference on insulating glass systems, frame materials, and the thermal standards that shape window specification in Polish construction practice.
What's covered here
Double and Triple Glazing Systems Explained
How insulating glass units are built, why gas fill and warm-edge spacers matter, and what separates a Ug of 1.1 from 0.5 in practical terms.
Window Frame Materials: PVC, Aluminium, and Wood Compared
The thermal, structural, acoustic, and maintenance characteristics of the three main frame materials used in Polish residential and commercial windows.
U-Value Ratings and Thermal Insulation Standards in Poland
What the Uw figure means, how Poland's 2021 regulatory revision raised the bar to 0.9 W/(m²·K), and how installation position affects real-world performance.
Key topics
Insulating glass unit construction
Cavity width, gas fill percentages, spacer types, primary and secondary seals, and how each element contributes to the finished Ug value under EN 673.
Thermal break technology
Why polyamide strips inside aluminium profiles exist, how break width translates to frame U-value (Uf), and where the regulatory threshold sits for Polish new construction.
Low-emissivity coatings
The difference between hard-coat and soft-coat low-E, emissivity values, correct coating position within a double or triple unit, and the effect on solar heat gain coefficient.
Installation thermal bridging
How window positioning within the wall cross-section affects linear thermal bridge values at the reveal, and why ETICS installations call for specific frame positioning.
Questions about glazing specifications?
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00-514 Warsaw, Poland