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Series 25 Mid-Range Vertical Sliding

Series 25 Mid-Range Vertical Sliding

Selectaglaze Ltd

Mid-range framing system with higher capacity balances to allow treatment of larger windows; supports thicker glass for higher noise insulation and is accredited to Secured by Design

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+44 (0)1727 837271 www.selectaglaze.co.uk

Mid-range, vertical sliding (VS) secondary glazing unit in two or three-pane sliding sash options. It has higher capacity balances to allow treatment of larger windows, and supports thicker glass for higher noise insulation.

Comprises of a mid-range versatile vertical sliding framing section, with contra-sliding sashes, providing access to the primary windows for cleaning. The sashes are removable. A minimum frame gap of 75 mm is recommended. Sashes slide within the frame so do not interfere with blinds or curtains. Twin brush seals ensure high sealing efficiency.

Suitable for listed buildings where the primary glazing cannot be changed. It is a reversible adaptation, so generally accepted by heritage agencies.


  • Blast tested to ISO 16933 Classification code EXV 33.
  • Secured by Design accredited.

General information

As drawing

Insert details.

As schedule

Insert details.


Twin compression seals, concealed fixings, can be coupled to other units with colour matched aluminium alloy transom/ mullion, pre-loaded spring balances


Extruded aluminium alloy 6063-T6


Ten year manufacturers guarantee subject to Selectaglaze terms and conditions. Five year on spring and spiral balances

Uniclass 2015
Ss_25_60_35_65 Putty-fronted single glazing systemsPrimary

L10/58 Secondary glazing system

L10/580 Secondary glazing system

Specification data - Putty-fronted single glazing systems
Product Reference

Series 25 Vertical Sliding (VS)


As primary window designs/ sightlines

Two pane, vertical sliding


As drawing

Insert details.

As schedule

Insert details.

Acoustic performance

Insert required dB level.

Thermal performance

See 'Options' below and insert requirements.

Frame -
Frame 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



Glazing -


Laminated, low -E


Toughened, low-E


4 mm

6 mm

6.4 mm

6.8 mm

7.5 mm

8 mm

8.8 mm

Glazing gasket




Ironmongery -

H3 recessed finger pull, colour matched to frame

H17 cranked D handle, colour matched to frame


Not required

L2 fitch catch (lockable), black

L2 fitch catch (lockable), brushed steel

L2 fitch catch (lockable), gold

L2 fitch catch (lockable), polished chrome

L2 fitch catch (lockable), white

L24 S15/25 sliding latch, colour matched to frame

Trickle ventilators

Not required

Over the frame acoustic ventilator

Over the frame standard ventilator

Acoustic reveal linings

Not required

Vinyl faced acoustic foam

Standard product features


- Material:

Extruded aluminium alloy 6063-T6.

- Style:


Product Options


Single sash maximum width: 1600 mm. Sash height to width ratio should not normally exceed 1:3.

  • Frame, minimum (h x w): 300 x 350 mm.
  • Frame, maximum (h x w): 3000 x 1600 mm.

Maximum sash area is subject to 31 kg.

Thermal performance:

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

Digital objects
PlatformCompatibleVersionCertified to
Revit 2015 2 1.3
IFC2X3 2 1.3
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