Zyle Fenster
Zyle Heritage Sash Window
A true-to-original timber box sash for listed buildings, conservation areas and sensitive period properties.
What this system is designed to do
A true-to-original timber box sash for listed buildings, conservation areas and sensitive period properties.
Where we would specify it
It is designed for projects where conservation consent and authentic external appearance take precedence over maximising glass thickness.
Features and performance
- Period-accurate sightlines
- External traditional putty glazing
- Mortise-and-tenon timber construction
- Concealed draughtproofing
- Traditional cords, weights and pulleys
- Optional Accoya, hardwood or oak
Technical specifications
Colours and finishes
Colours and finishes
Any RAL colour, or a stain.
Three coats of water-based microporous paint or stain are applied in the factory, so the windows arrive ready to install. White, RAL 9016, is standard.
Timber
- Material
- Engineered redwood as standard, with a solid hardwood cill; engineered hardwood, Accoya or European oak
- Certification
- FSC or PEFC
Finish
- Finish
- Three-coat factory spray: water-based microporous paint or stain
- Colour
- White (RAL 9016) as standard, any RAL Classic colour, or a stain from the Zyle Fenster stain range
Standard colours 27
White, RAL 9016, is standard. Select colours to add them to your project enquiry.
Any RAL Classic colour
Every colour in the RAL Classic range can be specified.
Also available
- Wood stains A stain from the Zyle Fenster stain range can be used instead of paint.
- Spacer bars White perimeter spacers as standard; black optional.
Your selection
Colours on screen are a guide only, and pearl and metallic finishes cannot be shown. Add your choices to your project enquiry and we will go through them with you.
Add to project enquirySource: Zyle Fenster’s specification and FAQs for this system. Standard colour range and glazing bead colours: Zyle Fenster, September 2026.
FAQs
Common questions, answered.
The essentials on the Zyle Heritage Sash Window: what it is, how it performs, the options, and where it fits best.
Still have a question?
Our team can talk you through the detail for your project.
What is Zyle Heritage Sash Window?
A true-to-original timber box sash for listed buildings, conservation areas and sensitive period properties.
How does Zyle Heritage Sash Window perform?
The heritage specification uses slim 4/6/4 Low-E double glazing where consent allows, with concealed draughtproofing and modern security details behind traditional profiles.
Which design and specification options are available?
Engineered redwood is standard, with hardwood, Accoya and European oak options. Traditional putty glazing, sash horns, mouldings, colours and ironmongery can be matched to the building.
When would Eco Home Windows specify this system?
It is designed for projects where conservation consent and authentic external appearance take precedence over maximising glass thickness.
Downloads
Drawings and technical data.
10 files for this system, published by Zyle Fenster. Tell us who you are once and everything here opens for the rest of your visit.
Datasheets 1
Specification sheets and technical data
CAD drawings 1
DWG section details for drawing packages
Revit families 4
Parametric families for Revit models
IFC models 4
Open BIM geometry for any IFC-capable tool
Before you download
Who should we send this to?
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