ultra-slim timber windows

The ultimate timber windows & doors

minimalist glazing timber windows eterno

Enjoy the unobstructed view

Eliminate the boundaries between interior and exterior and maximise the natural light in your home with uninterrupted views. We offer UK’s thinnest timber windows with a stunning contemporary design that are guaranteed to stand out. Plus, our timber windows are highly energy-efficient and Part L compliant.

The lightweight and durable timber frames can make up large openable windows and doors while maintaining a slim profile of 3.7 cm and achieving superior energy efficiency compared to Aluminium or uPVC windows. U-values up to 0.8W/m2K and 38+ colours and finishes.

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Windows for life

Exceptional expected lifetime of 60+ years with up to 10 years of warranty and minimal to no maintenance

Sustainable & eco friendly

Handmade in Italy with responsibly sourced timber from PEFC-certified forests

Endless design freedom

Large opening sashes, numerous opening types and countless design and finish options available

Superb energy efficiency

Оutstanding U-values as low as 0.8 W/m2K thanks to cutting-edge technology

high quality wooden windows eterno

Statement Wooden Windows

Handmade by Italian craftsmen from luxurious PEFC-certified wood. Each frame is structurally built up of multiple timber layers, making the timber windows as strong as steel, while maintaining a low weight and supreme energy efficiency.

High security Argon filled double and a warm edge spacer keep the warm in during cold days and keep the heat out during heatwaves.


  • Superb energy efficiency – overall U-values from 0.8 W/m2K, covering the Passive House standard
  • Timber frames as strong as steel thanks to patented lamellar wood and finger joint technology
  • Argon filled Low-Emissivity glazing, laminated for safety
  • Up to 10 years warranty and 60+ years expected lifetime

Wood types

  • Choose from oak, larch, fir, mahogany, meranti and pine

Wood finishes

  • Custom RAL colour lacquer
  • Multiple stain and varnish options for each wood type
  • We can also match your desired finish if you provide a sample

Handle finishes

  • Over 20 finishes available
  • Flush interior with hidden hinges
  • Astragal bars and classical pofile for an elegant traditional look
  • Integrated rainwater drainage system for external sliding doors
  • Motorised windows and lift & slide doors
  • Embedded alarm sensors
  • Aluminium cladding 

Let’s talk about your project

Get in touch today and our experts will answer all of your questions. We’ll come up with a bespoke solution that best fits your project so we can help turn your vision into a reality!

Enquire today