Clement Windows' EB24 Range

The Clement EB24 Steel Window Technical Specification

Product Summary

Clement EB24 windows have been created for fenestration projects where a traditional steel window appearance is required, replicating the appearance of original or existing windows while simultaneously providing all the advantages of 21st century technology.

EB24 windows are manufactured with exceptionally slim frames. The 24mm double glazed units mean that the largest possible glazed area is provided, thereby optimising solar gain and saving energy through reduced use of artificial lighting. Our most versatile and popular product, EB24 windows are appropriate for both refurbishment and new build projects.

Part L Regulations

EB24 windows comply with Part L of UK Building Regulations (April 2016), and meet an Window Energy Rating (WER) of "B" or “C”.

Manufacturing Specification

Made to suit your individual requirements EB24 windows are generally manufactured in accordance with BS 6510:2010 specifications for hot rolled steel windows. The mild steel sections used for Clement window and door frames are precision rolled in Switzerland using only recycled steel to suit Clement’s unique profiles and tolerances. All frames and ancillary profiles are hot dip galvanised to BS EN ISO 1461 and available with a factory applied polyester powder coating to BS EN ISO 13438 from the RAL colour range, exceeding the minimum paint thickness over the zinc of 60 microns.

Manufacturing Description

Frames are manufactured from hot rolled mild steel profiles with corner joints mitred, welded and dressed square and flat. Small panes can be formed with T glazing bars whose ends are tenon riveted and/or welded to the frame and cross joints are interlocked and welded with rigid joints. Composite windows can be assembled by connecting windows horizontally and/or vertically with mullions and/or transoms of hot rolled slim steel profiles. Box sections are available as tubes or as box mullions which can be either hot rolled or manufactured from sheet steel. Pressed metal cills are available in a choice of profiles. Trickle vents can be fitted in accordance with Part F of the Building Regulations.

Locking system

The EB24 range of windows is available with multi point locking to BS 7950 or traditional single point locking and other security devices if required.

Fixing

EB24 windows can be fitted into timber subframes, or direct to brickwork, concrete or stone. Windows are installed using fixing lugs or direct fixing stainless steel screws.

Glazing

EB24 can be supplied if required with various glazing options, from both inside or outside including:

  • Clear glazing
  • Georgian bars: using our G+ welded bar system; an applied bar system in a horizontal or vertical pattern
  • Genuine T bars
  • Leaded lights, using real lead that is soldered by hand in a diamond or rectangular pattern in variable widths of lead.

Combinations of fixed lights, top hung, side hung and bottom hung windows are available as well as single and double doors in both ‘open in’ and ‘open out’ configurations.

EB24 windows are double glazed with high performance 24mm insulating glass units. The specification includes the latest glazing technology, a 4mm inner pane, 16mm cavity with argon gas fill and a 4mm outer pane. This configuration achieves a superior performance with a centre pane “U” value of 1.2W/m²K. The panes are joined using special Warm Edge spacers.

In accordance with Glass & Glazing Federation best practice, Clement steel windows are factory glazed, however, our concealed fixings mean that fixed light windows need to be glazed on site after the frames have been installed. Glazing beads are made of aluminium or glass reinforced plastic (GRP). EB24 windows can be supplied shaped, with shaped heads, and ‘curved on plan’.

Dimensions (Provided for guidance purposes only)

Windows (both individual and composite panels) and doors are made to measure. Individual window and door sizes can be supplied within the limits shown in the table below. Sizes outside these limits may be considered after consultation with one of our sales consultants.

Nominal profile width: 36mm
Fixed lights: < 36mm
Opening casement frame: < 36mm
Opening casement and mullion: < 51mm

Sealant or glasket width is 2mm, thus the overall typical sight line for fixed light (perimeter) frame, inclusive of sealants, is 38mm.

  Width Height Perimeter*
WINDOWS Min (mm) Max (mm) Min (mm) Max (mm) Max (mm)
           
Fixed light 150 1800 150 2200 7200
Top hung 250 1800 200 1600 6400
Side hung 250 900 250 1850 5500
Bottom hung 250 1800 250 1200 5000
           
DOORS          
Single 500 1000 1800 2500 6600
Double 1000 2000 1800 2500 8600

 

The combination of width and height is to be such that the window perimeter does not exceed the maximum in the table, and that the ratio of lesser to greater dimension does not exceed 1:8 when using 4mm glass.

Air/water test results

Air permeability: Class 4
Water tightness: E750
Resistance to wind: C5/B5