Cortizo Windows is a specialist network for aluminium and PVC windows for homes, with professional advice, an energy-saving calculator, quote request forms and a store locator.

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Practical guide

Windows against air, water and wind

Beyond thermal or acoustic insulation, a window should perform well against air, rain and wind, especially on exposed facades, coastal homes or upper floors.

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PVC and performance: material is not everything

For air, water and wind, system design, gaskets, closing pressure and installation are especially important. In PVC, internal chambers and frame depth mainly support thermal performance, while tightness must be assessed as a complete system.

Material is not enough

Aluminium or PVC is only part of the decision. Locking, gaskets, profile design, glass, shutters and installation affect real performance.

Air permeability

Air permeability describes how the window limits air infiltration under wind pressure, helping reduce draughts and comfort losses.

Water tightness

Water tightness matters on facades exposed to rain or wind. Profile design, drainage, gaskets, connection to the wall and installation all count.

Wind resistance

Wind resistance is relevant for upper floors, open areas, coastal or mountain homes and large glazed openings.

The whole system matters

Profile, hardware, glass, gaskets, shutter box and installation must work together.

Guidance for your home

You do not need to interpret tests alone. Leave your details and a Ventanas Cortizo network store can guide you.

FAQ

Which matters most: air, water or wind?

It depends on the home and facade exposure.

Does installation affect these values?

Yes. Perimeter sealing and integration with shutters and finishes are important.

Do I need to know technical classes?

No. You can request guidance.

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I would like to be contacted

Beyond thermal or acoustic insulation, a window should perform well against air, rain and wind, especially on exposed facades, coastal homes or upper floors.

I would like to be contacted