Secondary Glazing

Call our secondary glazing team on 01603 424212

Add warmth to your home this winter!

  • Reduce noise pollution from road traffic, aircraft and general social noise.
  • Reduce heat loss and saving energy and reducing fuel bills
  • Added security
  • Eliminate drafts
  • Easy to install

We manufacture secondary glazing in our Norwich based factory, supplying Nationwide and installing within most areas of East Anglia. Our secondary glazing is a light weight, slim-line aluminium system which can be fitted in addition to your existing windows, whether they be single glazed or double glazed, plastic, timber or aluminium, in order to provide increased sound reduction, thermal insulation and security.

Our range of secondary glazing is supplied fully assembled and glazed, and is available in white, brown or any RAL colour. It is suitable for all types of buildings, including domestic homes, commercial buildings, schools, hotels, offices and provides a solution for listed buildings, period properties and houses in conservation areas where window replacement is not an option.

Secondary Glazing Background

Our secondary glazing units can be fixed through the face of the frame onto the existing window frame, using either our equal leg or odd leg profile, or fixed through the side of the frame into the reveal, using the equal leg frame only.

Where the existing windows are out of square or shaped a wooden sub-frame can be used. All systems can incorporate different glass options for increased thermal insulation, sound proofing as well as security.

Fixed secondary units
Lift out secondary glazing
Hinged secondary glazing
Horizontal sliding secondary glazing
Vertical sliding secondary glazing
Hinged in frame secondary glazing
Vertical sliding tilt out secondary glazing

Fixed secondary units

Fixed Secondary Glazing panels are as the name suggests a ‘fixed’ single panel which is not removable. These panels should not be used where access to a window is required.

Technical Information (PDF)

Lift out secondary glazing

Lift Out Secondary Glazing units are the best value for money where only limited access is required to the existing window, for example where a window only provides light into a room and doesn’t open. The glazed panel is lifted out of a fixed channel when access is needed to the existing window for cleaning or maintenance. It is advised, that the size of the pane to be lifted out be considered prior to ordering to ensure the weight and sizes are of manageable proportions.

Technical Information (PDF)

Hinged secondary glazing

Hinged Secondary Glazing units allow full and easy access to the existing window. Hinged units are available as single hinged units, where a single pane is hinged either on the side or the top of the frame, or double hinged units, generally suited to large windows or doors, where there are two panes which hinge on opposing sides. Hinged secondary glazing units use nylon hinges which can be side hung or top hung and a ‘stay’ can be fitted in order to hold the secondary unit in an open position. Turn buckles are fitted as standard to hold the hinged unit closed.

Technical Information (PDF)

Horizontal sliding secondary glazing

Horizontal Sliding Secondary units are available with two or more sliding panels, and are the most frequently used style of secondary glazing. These units can be fitted with locks to enhance security of the existing window. Horizontal Sliding units can also be used for wardrobes, by replacing the glass with mirror, or even coloured glass to give a clean contemporary feel.

Technical Information (PDF)

Vertical sliding secondary glazing

Vertical Sliding Secondary units are ideal for traditional sash windows. There are 2 types of vertical sliding units available, non-balanced and balanced. Non-balanced sliders, also known as the ‘guillotine’, are the most cost effective vertical slider. These are not fitted with balances, therefore the operator must support the weight of the sash when sliding. The sliding panel can be latched open in several positions and removed for cleaning or maintenance. Balanced sliders are the most complex style of secondary glazing system.

Technical Information (PDF)

Hinged in frame secondary glazing

Hinged in Frame Secondary Glazing units are similar to the standard Hinged units, allowing full and easy access to the existing window, but they come within their own frame and are much more robust. All Hinged in Frame units are fitted with a handle as standard to hold the hinged unit closed.

Technical Information (PDF)

Vertical sliding tilt out secondary glazing

Vertical Sliding Secondary Tilt Out units are similar to our Vertical Sliding units, but with the added benefit that the sliding panes tilt inwards in order to allow ease of cleaning and increase ventilation. Vertical Sliding Tilt Out units are available as balanced sliders only.

Technical Information (PDF)

SOUND REDUCTION

Secondary glazing is an effective method of reducing noise pollution, whether you are looking to protect from noise, for example road traffic, or retain noise, for example pubs and clubs.

How is Noise Insulation Achieved?

By increasing the gap, otherwise known as ‘cavity’, between the existing window and the secondary frame, the better the sound proofing becomes. We recommend a minimum cavity of 100mm for increased sound reduction. Road traffic noise pollution can be reduced by around 70-80% and can be reduced further by using acoustic glass or liners.

Glass Options

There is a wide range of glass options available to ensure optimum sound reduction. The main objective when aiming to reduce levels of sound pollution is to use glass which is a different thickness to that in the existing window. By using glass of different thicknesses, sound transmits at different frequencies, hence improving sound reduction. Acoustic laminated can also be used, this has a special interlayer, which is particularly good when trying to reduce high frequency noise, for example aircraft noise.

Windows tend to be a prime area for heat loss, which can be significantly reduced by introducing secondary glazing. Improved thermal insulation can help to save energy and, in turn, lower fuel costs.

IMPROVED INSULATION

Secondary glazing also helps to eliminate draughts, improving comfort and reducing the level of airborne dust getting into a building.

The use of secondary glazing can help to meet the standards set out in Part L of the Building Regulations, which were updated in October 2010 with the introduction of Energy Performance Certificates (EPCs). These certificates will define a building’s energy rating and will become a factor in property valuations.

Glass Options

By introducing secondary glazing, even with standard clear glass, you will improve the thermal insulation of your home, but for optimum results use Pilkington K Low-e glass. ‘Low emissivity’ (Low-e) glass such as Pilkington K Glass is designed to reflect heat from fires and radiators back into your home, greatly improving its thermal efficiency. At the same time, it allows heat from the sun through your window, contributing to its energy efficiency. By using less heat to keep your home warm, less energy needs to be produced, therefore lowering the overall levels of greenhouse gases and the cost of keeping your home warm.

Secondary glazing is ideal for period properties, where window replacement is not an option. It is practically invisible from the outside and unobtrusive on the inside, allowing added comfort and security without disturbing the view.

MEASURING FOR SECONDARY GLAZING

These instructions are for general guidance only, and you should be satisfied that they apply to your particular situation prior to ordering. Please note…

1) We recommend you allow a 10mm tolerance to allow for out of square reveals and for ease of installation.

2) To comply with Building Regulations, you will require toughened or laminated safety glass if your windows are less than 800mm from the internal floor level, within 300mm of a door, or if being used for doors.

If you are in any doubt please don’t hesitate to contact us on 01603 424212, help will be at hand. For quotation purposes we will require the width x height x style (e.g. 600mm x 1200mm, Balanced Vertical Slider) as per measuring instructions below.

Teaser Lift Out

Lift Out Units

Panel lifts up and out for removal

1) Take the overall size from wall A to wall B and deduct 10mm, this will be the width.

2) Measure from wall B to wall C and deduct 10mm, this will be the height.

Teaser Hinged

Hinged Units

Hung on the left, right or at the top, opening in

1) Take the overall size from wall A to wall B and deduct 10mm, this will be the width.

2) Measure from wall B to wall C and deduct 10mm, this will be the height.

Diagram shows unit hinged on right hand side (arrow points to hinged side)

Teaser 2panel 250x221

2 Panel Horizontal Slider Units

Both panels slide

1) Take the overall size from wall A to wall C and deduct 10mm, this will be the width.

2) Measure from wall C to wall D and deduct 10mm, this will be the height.

3) Measure from the wall A to the centre of mullion B and deduct 5mm. Panels do not have to be equal.

Teaser 3panel2

3 Panel Horizontal Slider Units

2 or 3 panels slide

1) Take the overall size from wall A to wall D and deduct 10mm, this will be the width.

2) Measure from wall D to wall E and deduct 10mm, this will be the height.

3) Measure from wall A to the centre of mullion B and deduct 5mm.

4) Measure from the centre of mullion B to the centre of mullion C, no deduction required for the centre pane. Panels do not have to be equal.

A 4 or 5 Panel Horizontal Slider can be measured in the same way.

Teaser Vertical

Vertical Slider Units

Balanced or Non-Balanced Options

1) Measure from wall A to wall B and deduct 10mm, this will be the width.

2) Measure from wall B to wall D and deduct 10mm, this will be the height.

3) Measure from wall B to centre of transom C and deduct 5mm. Panels do not have to be equal.

FLY SCREENS

Our Fly Screens are the perfect solution for keeping insects and flies out of your property during the warmer months. While they are translucent, the mesh allows for ventilation and a high level of visibility. Chances are you wouldn’t even notice them!

They are easily applied to our Secondary glazing by fabricating the sizes to the existing Secondary glazing and they can be easily inter-changed, or just as easily removed for cleaning and storage during the colder months. Our fly screens are hard-wearing and made from nothing short of the highest quality materials. Our secondary glazing fly screens are designed to integrate in to your secondary glazing and blend in seamlessly. They are the perfect solution in areas such as the kitchen where hygiene and health is a priority and now you can keep your windows open without the worry of insects and flies in the room.

If you have any questions or queries regarding this then please do not hesitate to contact us.

Flyscreen2 1
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