Factory & Technology — In-house PVC Window Production

Discover our production facility: V-Perfect technology, profile curving and in-house manufacture of Cortizo PVC windows and doors in Portugal.

This is where your window is born

A factory with state-of-the-art technology and a skilled workforce. We control the whole process — from profile to glass — to guarantee maximum quality in every structure.

We are a market leader in PVC and aluminium windows

Manufacturing windows at MultiWindows is a highly technological and streamlined process. We build from two materials — PVC and aluminium — using Cortizo profiles, Siegenia hardware and cutting-edge equipment that lets us produce with maximum precision.

+90%

of our clients recommend us

2010

Window production specialists since

The partners and technology behind every window

Cortizo Profiles

High-quality European profile with excellent thermal and acoustic insulation.

Schüco Systems

Premium German aluminium systems, synonymous with performance, security and design.

Siegenia Hardware

Robust and reliable hardware ensuring security and durability.

V-Perfect Technology

High-tech machinery for precise, automated manufacturing.

Quality Control

Permanent checks at every stage of the production process.

Tomorrow's technology — V-Perfect

We pay great attention to function, but also to appearance. We weld PVC windows to achieve an almost imperceptible joint — a perfect union effect no other technology can match.

WITH V-Perfect

100% aesthetics. Corner welds of absolute excellence, with no visible seam and added value for the end customer.

WITHOUT V-Perfect

Any other technology creates a weld seam that, even cleaned and painted, harms aesthetics and limits PVC's potential.

Aluminium, wood or PVC? V-Perfect combines them all.

With corner welds reaching excellence, PVC can be wrapped in films that reproduce the look of wood and aluminium, or combined with other materials for once-unimaginable results. An innovation developed by Graf Synergy.

Watch the video on YouTube

90% of a window's area is glass

The glass you choose defines your home's thermal comfort, quiet and energy efficiency.

Energy Efficiency

Low-emissivity glass and insulating air cavities cut heat loss in winter and overheating in summer — less heating and cooling, and a lower energy bill.

Sound Attenuation

Varied pane thicknesses and laminated layers absorb outside noise, turning a loud environment into a calm, comfortable interior.

Solar Control & Comfort

Solar-control coatings filter heat and UV rays, keep temperatures stable and protect furniture and floors from fading.

Custom shapes, no limits

Our high-performance hydraulic bending machine shapes PVC and aluminium profiles into non-standard forms — round, arched or half-arched. We create unique windows and doors beyond conventional sizes and shapes.

Round and arched windows

PVC and aluminium profiles

Made to measure for your project