Slim Low Sight Line Units

Treforest Glass are a leading supplier of Heritage Slim Low Sight Line Units, which come with a 10 Year Guarantee.  

Heritage Slim Low Sight Line Units

Our units are suitable for listed buildings, restoration projects, and the discerning Customer who wants a thinner timber frame.

We supply country wide using our own vehicles and couriers. 

At Treforest Glass, we are extremely proud of the reputation we have established by supplying the industry with quality products and great service. 

Our units come with the latest ‘cutting edge’ products which can achieve outstanding thermal and acoustic ratings, whilst still looking 200 years old!

We can produce Slim Low Sight Line Units containing many specialist glass types including: 

  • 3mm Cylinder Glass - 5.8mm Laminated Cylinder Glass (Suitable for Grade I listed buildings). ‘Full of old world charm’. 

  • The whole Goethe range (Suitable for Grade II Listed Buildings). 

  • Acoustic Slim Low Sight Line Units using 6.4 Stadip Silence.  This glass type will halve the sound/noise compared to single glazing or standard double glazing. 

  • Slim Low Sight Line Units incorporating Anti-Fade glass, protecting your soft furnishings. Self clean or ‘Easy Clean’ units that stop your glass becoming dull and lifeless over time allowing it to keep its ‘sparkle’. 

  • Our 14mm unit can achieve a 1.2W/m2K using ‘Optitherm Advantage’ specialist glass. 

  • Our 16mm unit conforms to building regulations when incorporating standard softcoat and a krypton filled cavity in a 90mm timber frame (in accordance with the Thermal Rating Register).

Float Glass 1950's onwards          

Goethe Glass 1860-1920 


Cylinder Glass 1700-1860

We offer help, advice and give our Customers options. If you have a wish list of what you expect from your glazing we can help you make it a reality.

For more information, please contact:

Debbie Wise, Sales Director - 07943655799 or 01443 841313 Ext. 205

                             Terry Potter, General Manager - 01443 841313 Ext. 203                             

Request your free Slim Low Sightline sample pack

The sample is a great way to help you visualise

  • The minimum thickness we have been able to achieve from a double glazed unit
  • The low levels of obstruction through the site lines
  • The quality of the glass

If you would like to receive your Free glass sample along with detailed technical documentation then either call us on 01443 841313 or alternatively send us and email by clicking the link

Email Us