The Duraflex Diamond Suite - Making The Difference

Casement Window

Casement Windows

The 70mm casement is a comprehensive system available in bevelled and fully featured. Achieving better SAP calculations under the Code for Sustainable Homes initiative, plus BFRC C, B or A rating for enhanced energy efficiency and a BRE expected lifecycle in excess of 35 years, Duraflex has the ability to meet your needs.

A full range of ancillaries allows varying product types to be manufactured, including Mock Horn (from Kits) and French casements.

Frame Offering
  • Choice of 4 outer frame heights - 46mm, 58mm, 68mm & 83mm
  • Choice of 3 transom heights - 63mm, 72mm & 86mm
  • 5 chamber outerframe and sash options
  • All sections available featured and bevelled
  • Available fully welded or mechanically jointed
  • High performance Q-Lon gasket supplied in all mainframe sections
Additional Features
  • All reinforcements are designed to achieve security requirements
  • 4 glazing thicknesses - 24mm, 28mm double & 36mm or 44mm triple
  • Astrical, Georgian bars in 20mm & 28mm widths
  • Single leg bead options for 20mm & 28mm widths
  • Comprehensive range of add-ons, couplers, corner posts & bay poles
  • Proprietary ventialation devices can be used on all designs

The Duraflex Diamond Suite is available in both Standard White and Brilliant White options; all using our non-lead PVCu. To satisfy the most discerning homeowner, we also supply a comprehensive range of solid and woodgrain foils, available ex-stock and from a 5 day lead time for speciality foil finishes.

colour options

Duraflex is committed to providing our customers with the best quality windows and doors. To achieve this goal we have devoted time, effort and expense to obtain all relevant Standards and Accreditations the industry has to offer. Operating under stringent manufacturing and quality standards, Duraflex is committed to ensuring that our product range achieves all relevant regulations and incorporates a program of continuous improvement to keep rigorous assessments and testing up to date.

Test Results for the Duraflex 70mm Casement:

test results

At Duraflex our experienced in-house support team provides a ‘one stop’ service for resolving your technical enquiries – from industry regulations and accreditation changes to product information.

  • Technical Assist dedicated Support Team
  • Assistance with factory layouts and planning
  • Wind loading calculations and advice
  • Accreditation, Regulations & Standards advice
  • In-house Thermal Calculations - fully approved simulators

We also have a dedicated team of mobile service engineers covering the UK and Ireland bring their expertise to suit your needs by providing tailored on-site support to assist your company.

technical support
technical support
technical support
technical support


Benefit from the ultimate Diamond Suite system range of profiles, supported with our complete fabricated product service.


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