Internally made of screen painted glass

View of the living area with Invitrum lift and slide

Simple lines and surfaces made completely of glass give light, transparency and depth. Glass is the fundamental element of the leaf, without interruption, and gives comfort and beauty to the window enriching it with new light and making the superfluous disappear, leaving only the essential visible.
Invitrum is internally made of screen painted glass which can be done in various colours and covers the frame, and externally in wood or aluminium, resulting ideal for purely modern habitations; it gives the home the touch of elegance and sophistication everyone desires.

Projects Invitrum

window cross sections Invitrum

Invitrum Collection, detail one
Invitrum Collection, detail two
data sheet
thermal characteristics

Uf calculation based on a single sash window 1100×1450.

Thermal transmittance of the frame:
Uf = 1.33 W/m2K for light wood (i.e. fir) – UNI EN 10077-2

Thermal transmittance of the frame:
Uf = 1.63 W/m2K for heavy wood (i.e. oak) – UNI EN 10077-2

Thermal transmittance of the window to:
UW = 1,1 W/m2K *

*The UW thermal transmittance of the window must be calculated each time based on the size, the type and the glass used.

frame specifications

Air permeability: EN 1026 – UNI EN 12207 Class 4

Water tightness: EN 1027 – UNI EN 12208 Class 9A

Wind resistance: EN 12211 – UNI EN 12210 Class C5


Glass-wood-aluminium window:

  • Frame thickness 62×70 (wood diameter 62×70)
  • Shutter thickness 77mm (wood diameter 47×42)
  • Width of the back-painted stripe of glass 82/110mm

Wood-glass window:

  • Frame thickness 68×83 (wood diameter 62×70)
  • Shutter thickness 56mm (wood diameter 47×60)
  • Width of the back-painted stripe of glass 82/110mm
  • Silver coloured Multitrend Maico

Wood varnishing:
Performed in three phases before the hardware is assembled:

  • Primer application by immersion
  • Intermediate spray finish
  • Final spray finish.

The entire procedure is performed using ADLER water-based products and the frames also carry a warranty regarding the duration of the varnish (see the illustration brochure).
All the surfaces are completely sanded and finished by hand.

Glass varnishing:
The glass is varnished in various colours using screen printing


Wood gluing:
High-resistant vinyl-based glues are used on the joints according to DIN 68602 Group B3 Standards.

Wood-glass gluing:
The wood is structurally glued to the glass using Sika glues


Using tenons with open cross-section and two and a half dowels.


Triple, thermo-acoustic sealing, supplied by DEVENTER in PURENE S which is age-resistant.

drip rail

Made of aluminium alloy for windows and Maico Transit threshold H. 25 mm made of aluminium alloy for patio doors.

standard window glass

Standard window glass for glass-wood-aluminium

6 tempered/18/4/18/44.1 up to 2.5 m2
8 tempered/16/4/16/55.2 from 2.5 m2 to 5 m2

Standard window glass for glass-wood

8 tempered/20/44.1 up to 5 m2

In case of light coloured glass panels, extra-light glass is used for screen-printed glass panels.

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