Secondary Glazing Product Range
We have a comprehensive range of secondary glazing units to suit every use and application.
For a quick visual look at products, dimensions and configurations, please see:
- Secondary Glazing Frames - Outer Frame Die Drawings, Dimensions & Fixing Types
- Colour Graphics of all Secondary Glazing Units - Plan & Side Elevations, Dimensions, Glass, Seals, Fixing & Frame Options, Configurations, Fixtures, Fittings, Locks, Catches, Stay Arms, Trims & Couplers
Standard Aluminium Secondary Glazing
- Horizontally Sliding Secondary Glazing
- Vertically Sliding Secondary Glazing Units
- Hinged Secondary Glazing, Top, Side & Double
- Lift Out Secondary Glazing
- Fixed Secondary Glazing Panels
Application
- Casement and Double Sash Windows
- Sash Windows
- Casement Windows & Doors
- Casement & Small Sash Windows
- Part Glazed Doors & Fixed Casements
Our standard secondary glazing frame finish is White, we also stock Brown and Silver Anodised finishes and can paint finish to any RAL colour to match or complement your windows & decoration.
Secondary Glazing Supplies - Common Product Specifications
London secondary glazing products are available in a wide variety of styles along with accessories and options.
The standard specifications, however, are common throughout the product range, as detailed below:
Aluminium Extrusions
All sections are extruded to exclusive designs and manufactured from aluminium alloy 6063T6 and produced in accordance with the BS EN 755 standard - to be rigid and free of warping.
Aluminium Finishes
The standard finish for all secondary glazing panels and frames is a 60-micron polyester powder coated White High Gloss Finish, produced in accordance with BS 6496.
Manufacturing Fixings
Dependent upon the type of secondary glazing frames - mechanically crimped concealed solid aluminium corner cleats - or - stainless steel and bright zinc plated screws.
Glass
With the exception of - Tilt-In versions of Vertically Sliding Secondary Glazing for Sash Windows - all secondary glazing panels come as standard with 4mm thick clear float glass, however please refer to the Glass Safety Note below.
Tilt-In versions of the Vertical Sliders - come as standard with 4mm thick toughened clear float safety glass.
Glass Safety Note
All Glass must be specified, manufactured and supplied in strict accordance with BS 6262, BS 6206 and Section N1 of Approved Document N of the Building Regulations - which between them specify the Safety Glazing requirements for all areas of “Special Risk,” including “Bathing and Washing Areas.”
Gaskets & Glazing
Secondary glazing panel and sealing gaskets are all extruded from synthetic rubber in accordance with ISO 14309:2011 - Rubber, vulcanized or thermoplastic - Determination of volume and/or surface resistivity.
This ensures that they do not “shrink” over time and that they retain the “memory” of their original manufactured shape, allowing them to be compressed then spring back to shape thousands of times as units are opened and closed.
The standard colour is black.
All glazing and gaskets are designed and assembled in order to facilitate easy demounting for glass replacement in the event of a breakage.
Draught Seals
Dependent upon the type of secondary glazing product:
- All sliding secondary glazing, framed hinged secondary glazing and lift out secondary glazing use polypropylene brush seals manufactured in accordance with BS 7386
- Non-framed hinged secondary glazing and fixed secondary glazing panels use compression seals manufactured in accordance with BS 7412 & BS 5750
The standard draft seal colour is light grey.
Sub Frames
Sub frames are manufactured to KD:FAS1F for stability and painted with two coats of acrylic white primer ready for final finishing.
KD signifies Kiln Dried and ensures that timbers will remain warp and twist free. FAS signifies Firsts and Seconds which are high grade joinery timbers, guaranteed to be free of defects such as knots and worm holes.
Special & Bespoke Secondary Glazing Products
- Curves in the Face Elevation
- Curves in the Plan Elevation
- Semi-Circular
- Circular
- Elizabethan Arched Heads
- Gothic Arched Heads
- Triangular & Trapezoid
- High security specification
- Out of Square
- Secondary Glazing Fly Screens
- Incorporating Trickle Vents
- Any RAL Colour Finish
- Specialist Glasses
- Specialist Film Applications
- Fire Rated
- Glazing with ultraviolet filter
Secondary Glazing Supplies - Special & Bespoke Products & Specifications
Secondary Glazing Fly Screens
Specifications
Additionally, many of the secondary windows can be supplied with interchangeable inserts - with fly-screens for summer pest & insect control - and secondary glazed for winter thermal insulation.
The fibre glass fly-screen mesh is translucent, providing excellent visibility and ventilation, as well as being both corrosion and combustion resistant.
Woven from fibre glass yarn, the mesh has a protective vinyl coating that is resistant to staining and easy to clean.
The standard fly screen mesh colour is a very light grey and once fitted it is virtually invisible.
Standard gauge is 18 x 16 - 18 threads in one direction and 16 in the other - per square inch.
Secondary Glazed Fly Screens - Commercial
The Food Safety (Food Hygiene) General Regulations 1995 state that windows which are opened to the outside environment must, where necessary, be fitted with insect proof mesh.
The use of secondary glazing units with fly-screen in a commercial environment such as a kitchen, café, restaurant, bakery, food retailer or food processing factory, ensures compliance with the hygiene regulations.
They prevent the entry of disease carrying flying insects and thus reduce the reliance upon chemicals and sprays.
Applications
- for the exclusion of all flying and crawling insects
Guidance & Restrictions
Some larger secondary glazing units may require the addition of discreet “H” bars to provide additional rigidity to the panels and ensure correct operation of the secondary glazing.
Secondary Glazing Fly Screens - Product Range
Manufacturing - Standards
- translucent light grey woven fibre glass 18 x 16 gauge mesh
Manufacturing - Options
- 30 x 20 gauge fine mesh
- extra fine Polltec © mesh for hay fever sufferers
Available for the following Secondary Glazing Types
- fixed panels
- hinged units
- lift outs
- horizontally sliding
- vertical sliders - standard non-balanced units only
- door units
- double (French) door units
Secondary Glazing Fire Resistant Units
Specifications
Fire resistant secondary glazing units are available either as Hinged or Fixed Units only and are manufactured with steel frames.
As well as side and top hung hinged secondary windows, double hung units are available for double casement windows, French and Sliding/Patio Doors.
Fire resistant windows can be created by upgrading rather than replacing the existing windows - by installing secondary steel windows with fire retardant glass that have been 30, 60 or 120 minute fire tested in accordance with BS476: Parts 20/22.
Applications
Fire Resistance
Maximum Sizes, Guidance & Restrictions
Secondary Glazing - Hinged Units
Side Hung
- 1200 mm width x 1800 mm height
Top Hung
- 1800 mm width x 1200 mm height
Double Hung
- 2400 mm width x 1800 mm height
Secondary Glazing - Fixed Units
- 1400 mm width x 2000 mm height
Secondary Glazing - Steel - Manufacturing Standards
- Fire Resistant units from 30 up to 120 Minutes Integrity to BS476 Parts 20 to 22
- steel window frames
- steel hinges
- fire retardant gaskets or fire retardant glazing tape with intumescent sealant
- 6mm clear Pyran or Pyroswiss glass
- steel glazing beads
- stainless steel lever handles
- 2 point latch deadlock
- manually locking twin rod flush bolts to slave doors
Manufacturing - Options
- any RAL colour finish
- left, right, top or double hung hinges
- overhead door closers
- twin rod anti-panic exit locking system
Accessories
- coupling sections for joining steel secondary window units side by side or one above the other
Secondary Glazing Bespoke & Special Units
Out of Square
Many windows in older traditional properties are out of square - in most cases these can be fitted with standard secondary glazing by shaping of the timber sub frame and the use of bespoke finishing trims.
- where this is not possible, the secondary glazing can be manufactured out of square
Arches, Curves, Shapes, Colours, Glass & Film
Both modern and old windows and doors often have decorative arches, curves and shapes. It is important to match these often unique features with the lines of the internal secondary glazing.
- to achieve this, we have the facilities to curve and bend sections as well as the expertise to produce angled secondary windows
- additionally, we work with all sorts of specialist glasses and apply film to glass for security, tinting, etc.
We also offer:
- the full RAL colour range for frame and panel finishes
- Van Dyke Brown powder coated finish as a stock item
- silver anodised finish from stock
- specialist glasses - for security, UV filtration, tinted, coloured
- film applied to glass - for security, UV filtration, tinted, coloured
Bespoke Secondary Glazing
We also produce, or modify our existing product range, to suit customer’s specifications - because of the setting up costs this is generally only feasible for larger commercial secondary glazing contracts.
- If you have any special requirements please talk to us about them - we will always do our best to help you achieve cost effective, practical, functional secondary glazing solutions
Further information:
- Glass & Glazing Options
- Secondary Glazing and The Environment
- Our Unique Survey & Installation System
Download our Secondary Glazing Brochure 