Frequently asked questions

PVC offers excellent value and very good thermal insulation, ideal for homes. Aluminium is more robust, allows larger openings and a modern look, and is the preferred choice for contemporary buildings and façades. Compare the systems side by side in the comparison table.

It depends on the system, the size of the project and our workload. Manufacturing usually takes 10 to 20 working days.

Yes. We advise you by phone, email or video call to propose the best solution for your needs and budget — and you are welcome to visit our factory in Petrich.

All our products are covered by warranty. We work with proven systems and materials, which allows us to ensure durability and reliability. Every order comes with CE and EN documentation.

Double glazing is the standard solution with good insulation. Triple glazing offers better thermal and sound insulation for higher energy-efficiency requirements.

Uf is the heat transfer through the frame only; Uw is for the whole window including the glass. For both, lower means better insulation. We list Uf for every system.

Yes. Every quote is prepared individually according to dimensions, system and site specifics. Send an enquiry with dimensions or a drawing.

Yes. Around 80% of our production goes to Europe — Greece, Germany, France, Italy, Belgium, Spain, the Netherlands and more. We can help with logistics if needed.

Yes — with private clients as well as construction companies and investors, for all types of buildings. See our completed projects.

We apply control at every stage — from incoming materials through production to final inspection. Our products are tested at institutes in Germany and Italy.

Maintenance is simple: clean regularly with lukewarm water and mild detergent and lubricate the hardware at least twice a year with acid-free oil. We offer service when needed.

Laminated glass is two panes bonded with an interlayer: on impact it cracks but the fragments stay in place and the opening stays closed — for safety, burglar resistance and noise. Toughened glass is about 2.5 times stronger in bending and withstands large temperature differences; if it breaks, it shatters into small blunt pieces — for large panes and strong sun. Balustrades and roofs combine both. Both go into the glass unit without reducing thermal insulation.

Ug is the heat transfer through the glass unit: double with Low-E and argon about 1.0–1.1 W/m²K, triple 0.5–0.6. The g-value shows how much solar heat enters: about 0.6 for Low-E, about 0.4 for “4 Seasons” and 0.2–0.4 for solar control glass. A “warm edge” is a spacer made of a low-conductivity material — it improves the whole window’s Uw by about 0.1 W/m²K and reduces condensation at the edge.