Composite windows and doors

Wood and alu - the best of two worlds

Increasingly used across the UK, composite windows to give the best of both worlds: a warm timber frame on the inside protected by durable, low maintenance aluminium on the outside. Compared to all-timber windows or all- aluminium windows, VELFAC composite frame design brings exceptional thermal performance, strength and durability, without compromising on style and frame width
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Unique frame construction

The VELFAC slim frame design brings together the best of both worlds - the character of internal pine and the durability and low maintenance of external aluminium, with a frame which is only 54mm to increase the amount of daylight and enhance the view.

High quality wood

Frames, mullions and transoms are made of VACUMAT or Flow-coat-treated pine with waterbased acrylic paint containing anti-mould fungicide. The thickness of final paint layer, when dry, is 60-80μm. Wood is treated with a clear lacquer to enhance the warmth of the natural grain, or painted in one of a range of RAL colours to match the interior decor.

Durable aluminium

External sashes are made of aluminium extrusion alloy EN AW-6060 or EN
AW-6063, polyester powder coated to a thickness of 60-120μm and a standard gloss level of 77%, or anodised to a thickness of 20μm. The finish of the external aluminium sash is either a hard-wearing polyester powder coat in a wide range of RAL colours, metallic finish in RAL 9006 & 9007, or anodised silver or gold.

Insulating glass

Glass constitutes 62.2 percent of a VELFAC window. VELFAC manufactures double and triple glazing windows and the cavity between each pane of glass is filled by a non-toxic inert gas called Argon. Argon is extracted directly from the atmosphere and is nature's most common noble gas. Argon makes up 0.1% of a VELFAC 200 window and thanks to its excellent insulating properties, our windows are able to reduce dramatically the heat loss through the glass.

Designed for disassembly

Did you know that VELFAC windows are made of wood, aluminum and glass and that they can be easily disassembled at the end of their life cycle?
Learn more about the individual components in a VELFAC window


Benefits of choosing
VELFAC windows and doors

VELFAC windows are designed with quality and durability in mind. Our windows deliver:


  • Exceptional thermal performance and low U-values
  • Low maintenance – no need to repaint
  • Strength and durability for a minimum of 40years
  • 12 years product warranty on windows and 5 years product warranty on doors
  • Superior craftsmanship and bespoke windows solutions

PVC, wood, aluminium or composite? Find out Pros and Cons of all windows materials


VELFAC is one of Europe’s leading suppliers of true composite windows and doors: the external aluminium frames insure long term durability up to 60 years and are available in a wide assortment of colours and finishes. The wooden interior is used to deliver a natural, warm finish, and provide high thermal performance both for the double glazing and triple glazing windows.

In VELFAC windows and doors aluminium and timber are bonded to make a truly composite frame and sash. The timber element acts as a thermal break enabling the frame to offer very high levels of insulation.


Frequently asked Questions


Here you can find a selection of frequently asked questions about our composite windows and doors. 

Alu-clad windows vs true composite windows – what is the difference?

When referred to windows and doors, “Composite” is a generic term which indicates that the units combine the attractive look and effective insulation of a timber window inside, but have aluminium on the exterior for easier maintenance and durability.


“Composite windows” and “alu-clad widows” are often used interchangeably, but it’s important to know that not all composite windows and doors are the same.


With sash and mainframe produced primarily from timber and only faced with aluminium, an aluminium clad window is essentially a timber window, where the external frame is covered with a lay of aluminium for protection.


True composite window systems instead, feature an independent aluminium sash on one side and timber mainframe on the other. In this case, the individual materials are easily distinguishable within the “true” composite structure and are bond together to provide unique properties and excellent performance.

Which is better uPVC or composite/aluminium clad windows and doors?

Aluminium is supremely strong and durable and is highly resistant to corrosion, capable of standing up to the outside elements. While PVC windows may require periodic replacement, you can rest assured that composite window systems will keep on working, providing style and performance without compromise.

How long do composite windows last?

VELFAC composite windows are designed to last, and have a lifespan of minimum 40 years, with no repainted needed for the lifetime of the operation. The external aluminium frame of VELFAC composite windows is powder coated.

Discover VELFAC windows and doors

VELFAC windows

VELFAC windows bring the best of two worlds - the warmth of internal wood and the durability and low maintenance of external aluminium. Our windows composite construction makes them a great alternative to wood or aluminium windows and gives a lot of benefits compared to modern upvc windows. 



Double casement door

The double casement door not only provides a greater entrance and exit, it is also an aesthetic statement that enhance any home regardless of its age or style. In addition, a double casement door provides a lot of natural light, making it a great solution to open up your home to the garden.



Single sliding door

VELFAC single sliding patio doors, also known as single leaf sliding doors, combine performance, functionality and style. If you are looking to increase the levels of natural light in your home whilst also benefiting from outstanding thermal efficiency, this is the product for you.



Discover VELFAC. Come and see our range of windows and doors

Windows and doors are a big investment, so it’s important that you see and experience their ‘ touch and feel’ before you take your decision.

Visit a local showroom

Many of our distributors have local showrooms where you can see our range of windows & doors and discover the options available to you. Fill our form adding details about your project, and we will get you in touch with one of the distributors in your area.