Naturo 80
Naturo 80 is the evolution of Naturo 76. The greater installation depth takes thicker glazing units and improves the thermal performance of the whole structure.
The timber, ethically sourced, is bonded in several laminations for better structural performance and greater durability. Four coats of lacquer protect the window from the elements.



















Technical characteristics
Reference figures for the system, measured in the laboratory and confirmed in our own production.
* Uw quoted for the 1230 × 1480 mm reference window with 4one/16Ar/4/16Ar/4one glazing in pine. FSC™-certified pine and oak available on request. The exact Uw for your opening depends on the dimensions, the timber species and the glazing chosen.
Window profiles
Three profile designs for the same system. The choice sets how the window reads on the facade, without changing thermal performance.
GreekA pronounced moulded frame, for facades with traditional character
Belgium B RetroA rounded external edge and classic proportions — the profile most often chosen for refurbishment
Outward openingA sash that opens outwards, typical of older buildings and coastal constructionProfile section
Two junctions of the system to scale: frame, sash, glazing and seals. Click to enlarge.
Choice of materials
Timber laminated in three or four layers is more stable than solid wood, does not move with humidity and allows arches and curved shapes.
Solid timberSolid pineNo visible joints, long sections free of natural defects, made for clear varnishes that show the grain
Finger-jointed laminateFinger-jointed pineDefect-free sections joined end to end by finger joints: maximum stability, ideal for opaque finishesSKLO technical note: above a 3 m opening, or with strong sun exposure, we recommend 80 mm laminate — the dimensional stability is worth the extra cost
Glazing bars
They give a window character and echo classical architecture. We choose the type according to the look you want and the energy performance required.
StructuralTimber bars in the sash colour, physically dividing the opening into panes
Inside the glassAluminium bars inside the sealed unit. Widths of 8, 18, 26 and 45 mm
BondedBonded to the glass with a warm-edge or silver central spacer, in the sash colourWith external aluminium cladding the bars are aluminium outside and timber inside — less maintenance, with the warmth of wood indoors
Available colours
Ten finish samples — nine shown in pine and one in raw meranti. The finish can be a stain, a RAL colour, clear lacquer or raw timber, and the full catalogue shows the palette on the other species we work with.
Madeira crua (pinho)
Verniz incolor (pinho)
Pinheiro-manso (pinho)
Nogueira (pinho)
Wenge (pine)
Carvalho (pinho)
Castanho escuro (pinho)
Cipreste (pinho)
Afromosia (pinho)
Madeira crua (meranti)Thermal performance
Uw de 0,81 W/m²K on the reference window, with Ug = 0.5 and an Ultimate spacer. Accepts glazing units of 34 a 44 mm, and the natural mass of the timber also helps to damp outside noise.
Applications
Single-family homes, refurbishment of heritage buildings, and projects where the joinery design is part of the architecture. Configurable with a Belgian or Dutch profile, as a monobloc version or outward opening.
Finishes
Pine, spruce, meranti and oak. Finished in a stain, a RAL colour, clear lacquer or raw timber, always in four coats applied in a spray booth.
Frequently asked questions
Quick answers to the most common questions about Naturo 80.
What is the thermal performance of Naturo 80?
Naturo 80 reaches a Uw of 0.81 W/m²K on the 1230 × 1480 mm reference window, with 4one/16Ar/4/16Ar/4one glazing (Ug = 0.5, Ultimate spacer) in pine. We state the exact Uw for your opening in the quote.
What are the maximum dimensions?
Maximum dimensions depend on the opening type and the weight of the glazing chosen; our team confirms them at the survey stage.
Which colours are available?
Pine, spruce, meranti and oak, finished in a stain, a RAL colour, clear lacquer or raw timber. Samples are shown in pine and meranti, so the final tone varies with the species and the grain.
What is the lead time and the warranty?
Manufacturing typically takes 6 to 8 weeks after the survey and order. Installation is carried out by our own team and the system carries a 10-year warranty.






