Vertical Sliding Product

Vertical Sliding

Series 25: Mid-range framing system with higher capacity balances for larger windows, supports thicker glass to achieve higher noise insulation; accredited to Secured by Design.
The spring balances incorporated within the sashes, support their weight during operation.
Series 25_Section detail

Series 25 Mid-Range

A mid-range vertical sliding system with higher capacity spring balances that allow treatment of larger windows and also support thicker glass when higher levels of noise insulation are needed.  With secure locking it achieves Secured by Design accreditation. The sliding sashes contra-slide to assist with cleaning and a minimum frame to frame gap of 75mm is recommended.   
Recommended maximum frame sizes (mm), subject to balance capacity
3000   1600  Link to BIM data

Balance Capacity

Maximum area dictated by 31kg balance capacity per sash.

Glazing Range  

4 mm to 8.8 mm

Frame Finishes

Standard white (HIPCA semi-gloss). Any standard powder paint, wood grain or anodised finish to order.
  • Warmer The Series 25 window has not yet been assessed for thermal insulation but it should compare well with the heavier Series 90 system which, will reduce heat loss by up to 50% using standard glass and up to 65% with a thermally efficient glass (low-E). The system is also fitted with high performance brush seals that will almost eliminate drafts and ensure much greater comfort near the window.  


    No performance figures available, contact Selectaglaze for details Quieter The Series 25 window has not yet been laboratory sound tested but it should compare well with the  Series 20 system which, set 100mm apart from the existing window, will reduce noise levels by more than 40dB (decibels).  In most circumstances this will achieve World Health Organisation guidelines for quiet living and working environments.  The Series 25 system also accepts thicker glass and this will improve insulation levels over and above the Series 20 levels. 

    Noise insulation measured in combination with a primary window

    No performance figures available, contact Selectaglaze for details Safer The Series 25 window fitted with two secure locks and glazed with laminated glass is Secured by Design accredited. Higher resilience is offered with 7.5mm anti-bandit laminated glass. The system has not been blast tested but it will compare very well with the Series 20 system which, glazed with 6.8mm laminated glass, offers protection against blast to the same level as anti shatter film in conjunction with bomb blast net curtains. 


    INTRUDER Secured by Design (accredited police preferred product)
    BLAST ISO 16933 EXV 33
    FIRE N/A
  • Styles available

    Section diagrams

    Selectaglaze secondary glazing Series 25 mid-range vertical sliding section diagrams
    • H3 Recessed Finger Pull Series 25Selectaglaze S25 vertical sliding secondary glazing H3 recessed finger pull
      H3 Recessed Finger Pull
    • H17 Cranked D Handle Series 25H17 Cranked D Handle for Series 25 vertical sliding secondary glazing
      H17 Cranked D Handle
    • L2 Fitch Catch (Lockable) Series 25)Selectaglaze secondary glazing S25 fitch catch
      L2 Fitch Catch (Lockable)
    • L3 SBD Fitch Catch Series 25L3 Secured By Design Fitch Catch for Series 25
      L3 SBD Fitch Catch
    • L24 Sliding Latch Series 25Secondary glazing vertical sliding L24 sliding latch
      L24 Sliding Latch
    H3 Recessed Finger Pull H17 Cranked D Handle  Match frame colour 
    L2 Fitch Catch (Lockable) L3 SBD Fitch Catch White Black Gold Polished chrome Brushed steel
    L24 Sliding Latch Match colour frame