Sliding Sash Windows with Spiral Balances 1.4 W/m2K


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Fireshot Capture 30 Vertical Sliding Sash Window Viking Https En Windows V

Our vertical sliding sash window design ensures good weather performance even on the stormiest days. When opening the window the sashes are separated avoiding wear on the weather strip . When the window is closed the sashes are pressed very tightly against the weather strip ensuring good performance.

Our vertical sliding sash window is fitted with torsion balance springs with lockers/handles on the bottom sash. Both sashes tilt enabling easy cleaning of both sashes from the inside.

U Value of our sliding sash window is 1.4 W/m2K.


Sliding Sash Windows with Spiral Balances 1.4 W/m2KSliding sash wooden window advantages

Contemporary appearance and sleek design;

Excellent storm proof detailing;

Excellent thermal performance;

Durability and ease of use;



Sliding Sash Windows with Spiral Balances 1.4 W/m2KMade to measure every time.

Drawings (PDF)     Drawings (DWG)

Product Info Sheet (pdf)

Our vertical sliding sash window can be combined with mullions, fixed lights and fixed sashes. For traditional effect Ogee mouldings are applied to the inside of the sash profiles. and the top frame can be fitted with decorative horns on the outside if required.

The durability of our vertical sliding sash window is guaranteed by the use of slow grown Nordic Pine and the use of a Teknos treatment system. Sealed Double glazing is used to maximise energy saving and noise reduction, anti solar glass is also available as an option.


Technical data of sliding sash window:

Sound Insulation Rw = 33 dB (-1;-4)
Frame Depth 144.5 mm
Material of Sash and Frame Glue-lam pine; quality class A1-A3
Glazing 26 mm 2-glazing, one LowE glass, argon filled
Hardware Caldwell hardware for vertical sliding sash window
Aluminium Cladding Timber only
Thermal transmittance Uw = 1,4 W/m²K
Number of sash gaskets 1 sash gasket
Dimensions Vertical Sliding Sash

Sash: W 404 – 1104 mm x H 560 – 2110 mm

NB! Height is a sum of both sashes!

Product Data Sheet for Vertical Sliding Sash Window

Installation Manual
Installation Manual

User Maintenance Manual

Additional information

Opening type

Hinge type

Glazing type

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Timber Type


U Value

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