COto Terrace and Balcony doors feature traditional Scandinavian design, which is combined with up-to-date shapes, high durability, faultless functionality and highest quality. Balcony and terrace doors are available either double or triple-glazed with various facade finish options.


Advantages and application

COto Terrace and Balcony doors are made of a wooden frame with composite material and aluminum claddings on the outside. Terrace & Balcony doors can be used in all type of buildings: private houses, apartment houses, as well as public and office buildings with a wide range of architectural, functional and visual requirements.
Terrace & Balcony doors include an indestructible composite material, which breaks the cold bridge, minimizes heat loss and provides higher temperatures around the edges of the glass. In addition, the risk of internal condensation is greatly minimized.

Even if moisture gets underneath the sash, it cannot damage the window, thanks to the composite part.

Technical information

  • System: Coto48 (double glazed)

Opening Type: Outwards open/ inwards open
Installation depth (mm): 116, 140, 164, 188; 214. Dimensions: Up to 1100 x 2400mm

Treshold: Aluminum, oak or jatoba, mahagony.
Thickness of insulating glass unit: 26 mm

Air permeability (EN 1026): Class 4 (classification EN 12207)
Watertightness (EN 1027): E1500 (classification EN 12208)
Resistance to wind loads (EN 12211): C3 (classification EN 12210) Sound: up to 33dB Rw+Ctr glass

Thermal insulation:
Door: U = 1.2-1.5 W/m2K
Insulating glass unit (4-18-4)


  • System: COto62 (triple glazed)

Opening Type: Outwards open/ inwards open
Installation depth(mm): 130, 154, 178, 202, 228. Dimensions: Up to 1100 x 2400mm

Treshold: Aluminum, oak or jatoba, mahagony
Thickness of insulating glass unit: 48 mm

Air permeability (EN 1026): class 4 (classification EN 12207)
Watertightness (EN 1027): E1200 (classification EN 12208)
Resistance to wind loads (EN 12211): class C3 (classification EN 12210) Sound: Up to 40 dB Rw+Ctr

Thermal insulation:
Door: U = 0.78-1.0 W/m2K 
Insulating glass unit (4-18-4-18-4)



COto terrace & balcony door is equipped with glass and can ensure:
different sun protection, sound insulation, personal safety, self-cleaning, self-dimming, painted glass, fire safety, anti-burglar and thermal insulation with different levels.
It can also be painted, MDF panels can be used instead of insulated glass unit.
Window bars: The window cross bars have multiple options to choose from that perfectly match any window system.
Technical calculations for statics and wind loads are done for all glazed projects.


Operating function of terrace & balcony door hinges, locks, handles, pullers (depending on the type of opening) are provided by IPA, PN, GU, MILA-GARANT, ASSA, HOPPE and others. Standard handles have silver EV1 color. Upon request wide choice of design and color handles for various needs, aestethics and purpose can be used. Windows can be equipped with extra features to ensure child safety, anti-burglar, PAS24, RC-2 protection. 

Standart terrace & balcony door hardware include ventilation , however, several solutions for ventilation equipment are also available depending on the air circulation and acoustic levels required inside the building.
(Trimvent, Biobevent, Klikventil, Duco)

Ventilation: Trimvent, Biobevent, Klikventil;
Embellishment: (grooves, painted hinges and more)

Paint and surface treatment

External aluminium cladding: all colours offered by the RAL, NCS catalogue with different surface finish such as Gloss, Matt, Granite, or other texture. Internal wooden part: all colours offered by the RAL, NCS catalogue. Water-based stains and lacquers provide ecological, environment-friendly and natural product look. Most used wood for windows is finger-jointed pine. The hardest part of pinewood – the heartwood – is used for window sashes. Oak, mahogany, sapeli and other wood species can be offered to meet client’s expectations and wishes.

Non-finger-jointed option is available for all types of wood.

Wood is warm, well absorbs sound and provides comfort and warmth to the house, meanwhile aluminium is a modern high-technology product that is particularly resistant to external impact, relatively light and does not add a lot of additional weight to window.

Technical drawings