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FIN-Project aluminium windows

Elegant aluminium design and excellent heat insulation

Clear, simple aluminium design, combined with excellent heat insulation values: this is our FIN-Project. 

This innovative window system combines the best features of two proven materials: the weatherproof and aesthetically pleasing aluminium on the outside and inside is not only very easy to maintain, but also opens up many possibilities in terms of colours. The high-quality PVC profiles in the core ensure exceptional thermal insulation and a high degree of tightness. 

Our fitting  and sash variant s can satisfy every need, while the concealed hinge s (optional) create an even lighter appearance.



FIN-Project Nova-line

This aluminium window has a modern and slender appearance: the frameless sash outline  on the outside provides your living quarters with plenty of light. Nova-line also offers excellent heat insulation.
heat insulation:
UW  up to 0.82 W/m²K
sound insulation:
RW  up to 40 dB 

FIN-Project Nova-line Plus

Nova-line windows can now be even better matched to your facade: with the high-quality enamelling available in a choice of nine stylish colours. Maximum views with a design plus.
heat insulation:
UW  up to 0.80 W/m²K
sound insulation:
RW  up to 41 dB 

FIN-Project Classic-line

The classic variant in our FIN-Project programme: flush external outlines and a slender internal appearance create a timeless, linear look. The usual aluminium colours are of course available along with excellent heat insulation.
heat insulation:
UW  up to 0.80 W/m²K
sound insulation:
RW  up to 44 dB 

FIN-Project Ferro-line

Striking external outlines, delicate aesthetics: Ferro-line is characterised by its typical steel window appearance. The wide aluminium colour range and excellent heat insulation are of course included.
heat insulation:
UW  up to 0.80 W/m²K
sound insulation:
RW  up to 44 dB 

FIN-Project Twin-line Nova

The frameless sash outline  ensures a modern look. The built-in solar and visual protection is safeguarded from dirt, wind and weather. This all-rounder also ensures a high degree of noise and heat protection.
heat insulation:
UW  up to 0.90 W/m²K
sound insulation:
RW  up to 44 dB 

FIN-Project Twin-line Classic

Innovative window technology combined with flush design. The built-in solar and visual protection is safeguarded from dirt, wind and weather. The window of course offers high energy efficiency and excellent sound insulation.
heat insulation:
UW  up to 0.92 W/m²K
sound insulation:
RW  up to 44 dB 

FIN-Project Twin-line Nova Cristal

Minimalist design and a high degree of transparency combined with the added value of a composite sash . This high-quality full glass window completely conceals the inside and outside sash frame s behind the glass.
heat insulation:
UW  up to 0.98 W/m²K
sound insulation:
RW  up to 40 dB 

FIN-Project Twin-line Classic Cristal

Flush aesthetics combined with strong outlines in an attractive aluminium look. Blind s or pleat s are protected from dust and weather between the panes. The fully glazed inner sash  creates space and transparency.
heat insulation:
UW  up to 1.0 W/m²K
sound insulation:
RW  up to 41 dB 

FIN-Project Step-line Cristal

The aesthetic highlight of Step-line Cristal is its full glass interior, while the exterior is characterised by its slender, striking lines. The window offers excellent performance as well as a wide range of design choice.
heat insulation:
UW  up to 0.85 W/m²K
sound insulation:
RW  up to 40 dB 

Quality hallmarks

Thermal insulation and heating cost savings

Good thermal insulation reduces heating costs in winter and acts as a heat shield in summer.
Our windows feature modern thermal insulation glazing with high insulation values for the window frames.
To energy savings
 Watch video 

Protection against break-ins

Security is a good feeling.
Even the standard versions of Finstral windows are difficult to prise open. The standard security fitting can if necessary be upgraded to provide even stronger protection against break-ins.
More about protection against break-ins
 Watch video 

Protection against injury

Safe should mean safe.
The extensive use of glass in private homes also means that safety is of ever increasing importance.
More about protection against injury

Bespoke products and design

Finstral windows and doors are made-to-measure in terms of form and function. We match your windows exactly to your home and your individual needs.
To the wide range of design possibilities

Opening and ventilation comfort


Our easy-to-operate quality fittings

Child’s play, child-proof

Our fitting s match our windows for quality. They offer outstanding ease of use and are lastingly reliable. Even the basic version provides good safety standards that can be upgraded on request. Our numerous equipment options can provide an optimal solution for your individual needs.

Quality-tested tilt-and-turn opening

Our quality-tested tilt-and-turn fitting  is equipped as standard with a multi-point security lock and mushroom bolt s. This makes it very difficult to prise open the sash 

The surrounding roller bolt s provide even pressure for the window against the seals. This ensures full and effective sealing. The sash lifter  raises the sash  into the correct position. The window can be easily closed and will remain free of wear for a long time. 

If you want more protection against break-ins we offer an even more effective security package, Protect Safety Plus.

Find out more about our Protect Safety Plus security package

Additional equipment for fittings


Concealed hinges

For a yet lighter and more linear interior appearance we recommend fitting  concealed hinge s. Note however when planning that their opening angle is limited to 95°.

Summer-winter energy-saving hinge

Our summer-winter hinge  allows you to reduce the normal tilt opening from 170 mm to 40 mm. A simple movement is enough to optimise ventilation and save energy.

Gap ventilation

We have developed gap ventilation for rooms that need to be slightly ventilated on a permanent basis. In the bedroom, for instance, good ventilation means good sleep. The gap ventilation is easily adjusted using the window handle.


The ideal solution for children's rooms or schools. Without a key, tilt-before-turn windows can be only be tilted, allowing you to ventilate in peace and safety.

Sash limiter

The sash  limiter limits the opening of the sash  to 90° and prevents it from closing by itself. Short, intense airing is easier because the sash  limiter can resist even powerful draughts.

Lockable doors

The lockable terrace door has a simple mechanism that allows you to operate and lock the door from both sides. Like the tilt-and-turn fitting , it also integrates two security locks with mushroom bolt s.

Skylight opening


Skylight opening

Skylights allow more natural light to enter your rooms, increasing your sense of living and saving energy. The skylight is easy to operate using a lever, crank or motor, while the concealed hinge s (optional) create an attractive appearance.



Complete accessories

Everything for your new Finstral window

Whether for handles, sash  bars or shades, our product range can always offer the right solution. All of our accessories are specially co-ordinated with Finstral’s window and door system.

Window handles

To make sure your window looks good and is easy to operate, Finstral offers window handles with their usual wide range. High-quality products ranging from modern to classic.

Satin-finished aluminium handle


Press-button handle


Lockable satin-finished aluminium handle


Stainless steel handle


Brass handle with grey chromed satin-finish


Solar protection


Window sensor


Sash bars


Protection against insects






Finstral dealers in your area

We have sales and installation partners in numerous European countries.

Simply enter your position, place of residence or postcode to see the nearest Finstral dealer in your area.

Questions about our dealer search?

Contact us and we will find the nearest Finstral dealer in your area for you.
 To contact form