Home > Companies > Selectaglaze Ltd > Series 90 Vertical Sliding

Heavy duty vertical sliding (VS) secondary glazing, suitable for use with treated monumental style sash windows, found in Edwardian and Victorian buildings and for security applications.

Sashes slide within the frame so do not interfere with blinds or curtains. All fixings are concealed within the frame, which may be linked to other frames with a colour-matched mullion/ transom section. Twin brush seals included for high sealing efficiency.

Will reduce heat loss by up to 50% using standard glass and up to 65% with a thermally efficient glass (low emissivity).


  • Acoustic: Tested in accordance with BS EN ISO 140-3: 1995 for acoustic performance: between 40 and 49 dB can be achieved.
  • Thermal: U-values as low as 1.80 W/m²K (timber primary window and low-E glass in secondary glazing).


  • Secured by Design (SBD) Accredited.
  • ISO 16933 EXV 33.

Standard product features


- Material:

Extruded aluminium alloy 6063-T6.

- Style:



Size (h x w):

- Minimum:

  • Sash (h x w): 400 x 400 mm.
  • Curved head or jamb radius: 700 mm.

- Maximum:

  • Sash: 1800 x 2000 mm.
  • Sash, two panes: 3600 x 2000 mm.

Maximum sash area subject to 60 kg weight capacity. Sash height to width ratio should not normally exceed 1:3.

Thermal performance:

Values of <2.9 W/m²K available; consult manufacturer for details.

NBS Specification

NBS Create logo
This product is associated with the following NBS Create clause:
25-90-35/150 Putty-fronted single glazing system

NBS Specification

NBS Buliding logo
This product is associated with the following NBS clauses:

Product specification

An important note about specifying



Selectaglaze Ltd


+44 (0)1727 837271

Product reference

Series 90 heavy duty vertical sliding (VS)


As primary window designs/ sightlines


[As drawing]
Insert details.
[As schedule]
Insert details.

Acoustic performance

[ ______ ]

Thermal performance

[ ______ ]

Blast performance

[Not required]
[ISO 16933 EXV 33]

Physical performance

[Not required]
[Secured by Design]


 - Finish:
[Anodizing, Analok bronze AA25]
[Anodizing, Analok silver AA10]
[Polyester powder-coating, HIPCA 9910 semi-gloss white]
[Polyester powder-coating, RAL]
Insert RAL colour.
[Wood grain effect]
 - Gloss level:
[Not required]
[High gloss]


 - Type:
[Laminated, low-E]
[Toughened, low-E]
 - Thickness:
[6 mm]
[6.4 mm]
[6.8 mm]
[7.5 mm]
[8 mm]
[8.8 mm]
[9.5 mm]
[10 mm]
[10.8 mm]
[11.3 mm]
[11.5 mm]
[12 mm]
[12.8 mm]
 - Gasket:


 - Handles:
[H3 Recessed finger pull, colour matched to frame]
[H4 Moulded handle, colour matched to frame]
[H23 S80/90 Locking actuator, colour matched to frame]
 - Locks:
[Not required]
[L21 S80/90 Standard multipoint]
[L22 S80/90 EXV 33/ SBD multipoint]

Trickle ventilators

[Not required]
[Over the frame acoustic ventilator]
[Over the frame standard ventilator]

Acoustic reveal linings

[Not required]
[Vinyl faced acoustic foam]

Manufacturer details

Alban Park,
Hatfield Road,
St Albans,
Hertfordshire, AL4 0JJ
Tel +44 (0)1727 837271
Fax +44 (0)1727 844053
NBS Plus
NBS National BIM Library