Horizontal Sliding Aluminium Secondary Glazing

The Measuring Process is easier than you may think, whilst very important it does not require pinpoint accuracy.

The idea is to ensure when fitting into a reveal or within a frame boarder, the unit is slightly smaller than the tightest narrowest points. this ensure the unit will fit and gives some room for adjustment, we recommend a 10mm tolerance deduction to the total measured width and height, this is the build size of the frame and the sizes used to get a quote.  Gaps and distortions around the frame are all hidden and sealed by the Edging Trim. 

See The Measuring Guidance for more information and additional links below:

• Comprehensive Measuring Download
• Window Measuring Template
• Panel Split Template
• Quick Guide

If you are surface mounting around a window reveal to the internal wall or around a glass panel (face fixing) – you will need to ensure the frame is wider than the recess to get a fixing into the frame/face of the area being treated, this would be adding the width of the frame on each of the four sides of the window – unit frame size details can be accessed in the Product Brochures.

Most of our business is to the DIY market, Units are supplied fully assembled, predrilled and glazed, easy installation ready.

If you follow the simple step by step Measuring Guide, the units will easily lift into position, with a few adjustments to get level, all of which is fully explained in the Installation Guide, the units can be fixed in place and the supplied finishing trim applied to cover, seal and hide any gaps and inaccuracies between the wall and frame.

If DIY is not for you, why not call on friends, family or neighbours to assist, anyone who can wield a screw driver can tackle this process.

If you haven’t got a contact you can rely on we can suggest using the Which Trusted Trader search service, just enter your postcode and search for Carpenter /Joiners, you should get a list of qualified and verified tradesmen in your area and whilst we can’t offer Personal recommendations, they will be more than capable of carrying out the work.

Yes, we can provide most glass types, based on the specific needs of your project.

The standard glass is 4mm toughened, This safety glass is a minimum requirement where building regulations demand health and safety considerations, including the distance from floor and doors.

All our glass options conform to BS6206: 1981 / BS EN 12600 for impact resistance. 

We do not offer float (non-safety glass).

Subject to panel size this may default to 6mm toughened.

Laminated, Acoustic, Thermal Low-E, and Obscure glass options can be accommodated.

The standard for Sliding, Lift-Out, Hinged & Insert panels are single glazed.

This ensure the frame profiles are manageable size to operate as an unobtrusive secondary window, creating a double glazed arrangement with the primary window. This offers significantly higher soundproofing performance than double glazing (which is a poor acoustic barrier) thermally it will offer equivalent performance to many double glazed products – see the performance data in the Help Centre 

• The Vision range can accommodate up to a 6.8mm glass
• The Vision Ultra Panel fits the standard frame options but can accommodate between an 8.8mm to a 10.8mm glass.
• The Vision HD Hinged System can accommodate up to a 28mm Sealed double glazed unit.

See our Full Glass Ranges options 

What is Low-E Glass?

Low-emissivity glass (or low-e glass as it is commonly referred to) is a type of energy-efficient glass designed to prevent heat escaping through your windows to the cold outdoors. Low-e glass such as Pilkington K Glass™ Range has an invisible coating which  reduces heat transfer and reflects interior heat back into your room. This can offer a 5-10% increase to the thermal performance of a non-coated glass.

With secondary glazing it is a hard coat application, it has a robust quality, but can be scratched if abrasive materials are used to clean the glass, see maintenance.

What is Laminated Glass & Acoustic Laminate Glass.

Both are basically the same structure, with 2-layers of glass sandwiching a polymer sheet, the plastic film us usually 0.4mm or 0.8mm thick, so a 6.4mm Laminate is 2 layers of 3mm glass either side of a 0.4mm film, an 8.8mm laminate is 2-layers of 4mm glass either side of an 0.8mm film.

With a standard laminate, the plastic layer will increase impact resistance and a high performing safety / security option.

With the Acoustic Options, it is exactly the same make-up, but the polymer liner is a material called Polyvinyl butyral (PVB) which enhances the ability to absorb and dissipate the sound energy within the glass structure more effectively.

Obscure glass options are available but priced on application.

It is difficult to give exact details, as every property and everybody can be affected differently by noise pollution, however the science confirms, Clearview Secondary Glazing can reduce noise by as much as 80% or by over 50 decibels, (a reduction of 3dB is equivalent to halving the noise energy) this is 5 times greater than either double or triple glazing. This is subject to final specification and installation limitations, these details can be clarified during a consultation with one of our advisors. But the number one target is to try and put as much space between the existing glass and new secondary glass, The bigger the air-gap the better the performance. if the space allows try and get 100mm + to an optimum 150mm to 200mm. where space is limited a thicker glass will help. We always recommend starting with a 6mm glass for soundproofing.

Soundproofing for comprehensive information

Watch Our Performance Video

We have test certification which confirms that Clearview Secondary Glazing can enhance the thermal insulation of a single glazed window by as much as 65% or a U-Value of 1.868 W/m²K (a U-Value is the formula for measuring heat loss the bigger the number the more inefficient the window is, a standard single glazed window has a recognised U-Value of approx. 5.8 W/m²K. This performance is better than a Class C, with some products  this performance can be as much as A+. English Heritage and Historic Scotland carried out research through Glasgow University which showed secondary glazing out performed  double glazed replacement windows. This is subject to final specification and installation limitations these, details can be clarified during a consultation with one of our advisers. see our Thermal Insulation pages.

The cost of secondary glazing varies depending on factors such as the size of your windows, the type of glazing chosen, and the complexity of the installation. Typically, prices start from £163.66 per window, making it a more affordable alternative to double glazing. Investing in secondary glazing not only reduces energy bills but also enhances comfort and property value. Secondary glazing is a cost-effective solution for improving energy efficiency, sound insulation, and security in your home, get a quick and easy quote to find out what it will cost you.