Logik Flush Sash Windows

The leading high performance, sustainable window & door system

Logik has been a favourite with fabricators and installers for many years now. With all the advantages it offers over other systems, it’s no wonder. From game changing features like its unique knock-in bead system to the single steel reinforcement bars that make it a byword for strength and security, Logik is the name people look for in the trade.

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We’re always looking for new ways to improve the quality of our products, the ease of their fit and the level of business they bring in for our customers. And for Logik, that’s meant developing a ythird frame style to add to our Chamfered and Ovolo ranges – the Logik Flush Sash.

Design Features

  • Outstanding technical performance
  • Fast, accurate fabrication and installation
  • Superb energy efficiency performance
  • U-values as low as 0.8
  • BBA certified system
  • Market-leading sustainability
  • Wide range of colour and style options
  • 10-year guarantee for peace of mind


  • Chamfered or Ovolo
  • Grey substrate option
  • 18 frame colours
  • A range of window styles
  • System accepts both 28mm and 36mm-thick glazing
  • Secure by design
  • British Standards Institute (BSI)
  • British Board of Agrément (BBA)


Frame / dimension Dimension X
Thermalogik outer frame (EWS 7001) with sash T (EWS7005) 97mm
Main frame (EWS 7020) with sash T (EWS 7005) 102mm
Main frame (EWS 7021) with sash T (EWS 7005) 107mm
Main frame (EWS 7011) with sash T (EWS 7005) 107mm
Large main frame (EWS 7006) with sash T (EWS 7005) 122mm
Frame / dimension Dimension Y
Sash T (EWS 7005) with transom Z (EWS 7003) 117mm
Sash T (EWS 7005) with intermediate transom Z (EWS 7023) 132mm
Frame / dimension Dim Z
Thermalogik outer frame (EWS 7001) 50mm
Slim outer frame (EWS 7020) 55mm
Main frame (EWS 7021) 60mm
Main frame (EWS 7011) 60mm
Large main frame (EWS 7006) 75mm

Technical Features

  • Full depth eurogroove for maximum hardware compatibility
  • Soft line bevel feature is matched by the bead
  • Single hinge and espagnollette location in sashes for ease of fabrication
  • PCE gaskets offer market leading adhesion, air tightness and weather peformance
  • Unique patented knock-in bead system available with 28mm and 36mm putty line
  • Assessment report number 14/5154

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