24/06/26

Porthole Window: Charm of Round PVC Windows

Round PVC windows are increasingly becoming a standout feature on facades and in interiors — they evoke the look of ship portholes, stained‑glass windows in historic mansions, or stylish loft elements. This shape instantly gives a building character: the house no longer looks like a standard design but as if it were created as a custom project.

These windows are made using a thermal bending process: the profile is heated and carefully shaped to a template to achieve a smooth radius. To ensure rigidity, imposts (transoms) are often added to the design — these divide the circle into segments and also act as supports. However, reinforcing curved profiles is more challenging, so the durability largely depends on the quality of the PVC itself and the accuracy of the engineering calculations.

Round windows can serve different functional purposes. Some are fixed (non‑opening) units — they work as a decorative accent and let in plenty of light. Others come with sashes: they can be designed as swing or centre‑pivot models, with the sash rotating around an axis. Due to their shape, the opening mechanisms are more complex and require precise adjustment.

Installing such windows demands extra care: the opening must match the dimensions exactly, and the installation joints need to be fully sealed. But the result is worth it: a round window becomes a visual focal point in any room, whether it’s an attic, bathroom, or living room. It doesn’t just let light in — it sets the mood for the entire space.