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21/12/25

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Where triangular PVC windows are appropriate

Triangular windows are a striking architectural element that seamlessly fits into the design of houses with attics, pitched roofs, and non‑standard layouts. Modern PVC structures allow implementing this shape while preserving all the functional advantages of plastic glazing.

Where they are used

  • attic spaces and loft areas;
  • houses with gable and hipped roofs;
  • dormer windows;
  • bedrooms, bathrooms, saunas, swimming pools;
  • gazebos, workshops, outbuildings;
  • buildings with creative architectural solutions.

Main shapes

  • Isosceles — symmetrical classic form;
  • Right‑angled — with a right angle at the bottom (convenient for swing opening);
  • With truncated corners — visually triangular but with 4–6 corners.

Opening options

  • Fixed — no opening mechanism (minimum angle: 15°);
  • Swing — the sash is hung on the vertical side of the frame (requires a right angle at the bottom);
  • Top‑hung (tilt) — optimal for isosceles triangles;
  • Tilt‑and‑turn — for right‑angled models with a vertical frame side.

Design features

  • multi‑chamber PVC profile for thermal insulation;
  • steel reinforcement for structural rigidity;
  • special seals for airtightness along sloped edges;
  • mullions (vertical/horizontal crossbars) for large openings — increase strength and allow combining sashes;
  • option to install energy‑efficient and impact‑resistant insulating glass units.

Advantages

  • aesthetic expressiveness and individuality of the facade;
  • efficient use of space under roof slopes;
  • improved room illumination;
  • compatibility with mosquito nets and ventilation valves;
  • durability and resistance to weather conditions.

Key limitations and considerations

  • minimum angle for fixed windows: 15°;
  • minimum angle for operable windows: 30° (otherwise joint strength deteriorates);
  • for swing and tilt‑and‑turn models, the right angle must be only at the bottom;
  • maximum tilt angle for fixed windows: no more than 30°;
  • higher cost compared to standard windows due to complex manufacturing and increased material consumption;
  • precise load calculations and professional installation are required.

Triangular PVC windows are a bold design solution that, with proper planning, will become a decorative highlight of your home.

 

 

What windows do you like the best?

Which kind of windows would you prefer If you were going to replace the old ones in your house or apartment?





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