Sleek & Unobtrusive DesignReduce External NoiseIncrease Home SecurityImprove Thermal Efficiency
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Manufactured in GB
Secondary Glazing Specialists
200+ RAL ColoursSecondary glazing is a second custom-made window, attached to the inside of your existing window, creating a double glazed effect, without damaging or changing your original windows. Clearview secondary glazing is designed to be discreet and compliment the appearance, décor style and property type, see our Quick Guide for more information.
What makes us unique?
Our most popular product! Mainly because, it's so multifunctional and appropriate for all buildings.
Our most sophisticated product, created with your sash window in mind. Weighted technology for ease of access.
From heavy-duty, to slim-line options for a truly unobtrusive option. Our most secure range.
Our most cost effective option that can match any size, shape & opening. Your options are endless.
We know not all windows are square. Our entire range is available in various arches and shapes to suit your unique needs. From gothic arches to circles, we can template your window to ensure a perfect fit for every home.
Discover how we can get the perfect fit
In recent years, secondary glazing has surged in popularity among homeowners and property developers. This trend is not merely a passing fad but a reflection of the numerous benefits secondary...
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When we think of secondary glazing, the first benefits that often come to mind are improved insulation and reduced energy bills during winter. However, secondary glazing is not just a...
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As a homeowner, you’re likely always on the lookout for ways to enhance your living space. Whether it’s improving energy efficiency, reducing noise, or adding value to your property,...
Read MoreMany period homes have windows of 100 years old or more. With relatively little maintenance these windows can last another century and still be in good working order. Secondary glazing allows customers to retain the original character in their properties whilst enjoying all the benefits of modern glazing. In many circumstances it’s advisable to retain your original windows enhancing them for energy efficiency — it prevents material from entering landfills, can save money and preserves a certain charm that new windows may not have.
Clearview secondary glazing improves the comfort of your home and helps to reduce your heating bills, reducing energy consumption and carbon emissions. Clearview’s systems are renowned for their thermal efficiency performance and can be further enhanced by utilising Pilkington K or Low E glazing. After Clearview secondary glazing is installed, the thermal efficiency of the window can increase by 60-70%.
With the right specification of secondary glazing and acoustic glass, a reduction in excess of 50 decibels of noise can be achieved, which can be 5 x times that of double or triple glazing (that’s a reduction of almost 80% of the noise entering a room). A reveal fix is the option to select when there isn’t sufficient frame on the primary window to attach the secondary glazing unit.
The secondary glazing panel at a window or door creates an additional security obstacle for an intruder to breach; a discreet barrier which blends unobtrusively with its surroundings internally and externally. Clearview have a range of optional security locks and handles which further enhance security. Additionally, by specifying Heaver toughened or laminated glass, security can be increased even further.
Secondary glazing provides an effective internal seal, allowing for balanced ventilation in the space between the primary glass and the secondary glazed unit. This seal prevents the inner glass becoming too cold, stops condensation forming. Clearview secondary glazing is a simple to fit, cost-effective solution – whether you fit yourself, or have a Clearview approved installer fit for you.
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:
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
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
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.
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Secondary Glazing Specialists