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Peace & Quiet

Noise Reduction - Reduce Noise Levels by up to 80%
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Secondary glazing can drastically reduce noise levels for property’s that have single, double or triple glazing.

Noise reducing secondary glazing can block external noise pollution by up to 80% which is the equivalent to 54dB.

Leading the fight against noise pollution in the home is Secondary Glazing. Secondary Glazing continues to grow in popularity, in no small part thanks to its unique soundproofing, thermal benefits and draught prevention capabilities. The key to minimising noise levels is to install an extra barrier that sound waves find it difficult to pass through.

To achieve optimum performance we often advise that secondary glazing is installed with a gap of 150mm – 200mm from the primary window. Blinds and ornaments can still be displayed on the windowsill as secondary glazing is slimline and discreet.

All property’s can be affected by noise issues, the most affected is listed property’s and property’s within conservation areas with single glazed timber windows. Secondary can be installed within conservation areas and Grade II listed buildings and is perfect for window noise reduction.

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Sound can penetrate the smallest of holes, Granada’s secondary glazing is manufactured on state of the art CNC machinery, which ensures a tightly sealed frame. This teamed with correctly specified acoustic glazing will greatly reduce the volume from external sources, eliminating it completely or reducing it to a whisper.

Made from durable aluminium and available in over 200 RAL colours our systems are discreet, functional and come with a 5 year warranty on frames and glazing and a 2 year warranty on moving parts.

Benefits of Secondary Glazing:

  • Window noise reduction by up to 80%
  • Easy to Install, DIY or Installed by tradesman
  • Reduce heat loss through existing window by up to 65%
  • 10% more heat efficient than double glazing
  • Can be installed within conservation areas
  • Available in over 200 RAL colours
  • Arched frames
  • Delivery 10 days of order
  • 5 year warranty (FENSA warranty of installers)

Frequently Asked Questions

To what extent will secondary glazing reduce the sound pollution in my home?

Correctly specified and installed, secondary glazing will acoustically outperform all other types of glazing. It is not uncommon to see secondary glazing where double or triple glazing is installed. To achieve up to an 80% acoustic performance Granada advise the specification of acoustic glass and an air cavity no less than 150mm – 200mm glass to glass.

The key to manufacturing noise reducing secondary glazing is to ensure the aluminium frames are sealed which prevents noise leaking through any seams or joints. Granada’s products are manufactured using state of the art CNC machinery which precisely cuts the aluminium, enabling us to produce a sealed unit. This teamed with the correct acoustic glass, an air cavity of up to 200mm and a high quality installation will reduce noise levels by up to 80%.

What does the installation process consist of for secondary glazing?

Secondary glazing is installed to the interior side of the room creating little to no mess. Often installations can be completed within 30 minutes to 1 hour. To view the installation of secondary glazing please visit our video library web page: VIDEO LIBRARY

We work closely with over 500 national homeowner/trade customers who will make an appointment to measure and install at your convenience. For the DIY market, Granada can supply secondary glazing as supply only where installations videos and what measurements you need to take can be viewed here.

How much does Secondary Glazing Cost?

Secondary glazing is a cost-effective solution to reduce your noise issues. No other form of glazing can reduce noise levels by up to 80%.

Secondary glazing is available in many different styles and levels of functionality. A simple lift out secondary glazed unit can cost as little as £70.00 + fitting. Granada manufactures and installs a variety of secondary glazed units specifically designed for functionality, acoustic and thermal benefits.

Different thicknesses of glass and glass types can be utilised to cure the problems you are facing. The style, type of glass and size of the window will affect the price of the secondary glazed unit. Our trade partners or internal sales team will ask questions based on your application and any problems you are experiencing. This will allow us to recommend a product that is in line with your budget and will exceed your expectations.

Reduce Noise to a Whisper

Do you live on a noisy road? Reports indicate that a passing diesel bus often creates 85dB of noise. Correctly installed secondary glazing can reduce noise levels by 54dB, a reduction of 54dB will reduce the noise to 31dB which is the equivalent to a whisper.

To achieve the best acoustic performance, we advise secondary glazing to be installed with a 150mm to 200mm cavity between your primary glazing and secondary glazed unit. Optimise your window noise reduction with our secondary glazing options.

What Our Customers Say.

Quality of work: The windows look really good and fitted to a high quality

Visual Quality of materials: The windows visually look fantastic, and nicely painted. Can’t wait to try them out when it gets warmer

On the work of the fitters: Their work has been excellent. V friendly, efficient, professional and tidied up after themselves. V pleased

General Comments: Really impressed with the speed and quality of the work. It has made a huge difference to the house

Would you recommend our company to others? Yes

July 20, 2016

Quality of work: Excellent

Visual Quality of materials: Windows look great, have made a big difference, very polished

On the work of the fitters: Very professional, quick & efficient

General Comments: Impressed with the time taken

Would you recommend our company to others? Yes

June 24, 2016

About Granada

Noise Reduction

Stamford House

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Today, the technology is certainly with us

Noise is all about our perception and how we relate to it, and acoustic glass can reduce these to a whisper. Secondary windows provide all the thermal insulation and soundproofing that modern living standards demand, whilst preserving the character and appearance of older properties.

This massive impact is certainly not lost on many of the company’s grateful customers, with comments such as ‘made a huge difference’ and ‘dramatic reduction in noise’ not uncommon. With different noise sources requiring different types of secondary glazing solutions, the task can be a challenging one, particularly when aesthetics and thermal insulation also require consideration, but generally the results make for happy listening.

As pressure grows on developers to build on brownfield sites, near busy roads or under flight paths, the issue of noise pollution has the potential to become a major cause célèbre, whilst home energy assessments have focused the home buying public’s attention on to the issue of energy efficiency.

  • Just 65 dB of noise can be problematic, whilst levels between 70-125 dB can be painful (a passing motorcycle may reach 100 dB), or above that, outright unbearable.
  • Low frequency noise like these can result in actual vibration of the glazing, meaning the problem can get progressively worse. The general “rumble” of traffic noise, passing aircraft, heavy goods vehicles, buses, taxis, train and railway noise, these tend to fall in the low frequency category. In these instances, secondary glazing with thicker glass, fitted correctly, can make the world of difference.

Granada has cured noise problems for 1000’s of homeowners covering all of the UK. Working with our trade partners we can guarantee the highest levels of product quality with exceptional customer service. Please speak with us direct to discuss your requirements where we can advise a product suitable for your application. You can contact Granada by telephoning 01909 499 899 or alternatively click here to email.

Acoustic Performance & Testing

Chiltern Dynamics, market leaders in acoustic testing and modelling, found our products capable of reducing noise levels by over 50db – that’s enough to make a passing motorbike sound like a purring cat. It’s also one of the most obvious benefits that our residential customers mention to us after we’ve renovated their home.

High & Low Frequency

Low frequency noise can result in actual vibration of the glazing, meaning the problem can get progressively worse. The general “rumble” of traffic noise, passing aircraft, heavy goods vehicles, buses, taxis, train and railway noise, these tend to fall in the low frequency category. In these instances, secondary glazing with thicker glass, fitted correctly, can make the world of difference.

With a comprehensive product range and portfolio that spans all major sectors, Granada has supported renovations to some of the UK’s most iconic, historic buildings. Here, the aesthetics are usually a crucial factor, but noise too has a role to play. Emergency services, power tools and overhead powerlines, these higher frequency noise polluters are from the modern era and not the sorts of things that, even if they had the technology, were around for the architects of yesteryear to deal with.

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Fixed Secondary Glazing FAQs

Can I Reduce Noise Pollution in my Home?

Secondary Glazing will help protect your home against noise pollution. The addition of Secondary Glazing into your home can help to block external noise pollution by up to 80%. The Secondary Glazing panels act as a second barrier against the sound from the outside. To achieve optimal performance, it is advised that Secondary Glazing is fitted with a gap of 150mm - 200mm from the primary window.

To What Extent will Secondary Glazing Reduce the Sound Pollution in my Home?

Correctly specified and installed, secondary glazing will acoustically outperform all other types of glazing. It is not uncommon to see secondary glazing where double or triple glazing is installed. To reduce noise levels by up to 80%, Granada advises the specification of acoustic glass and an air cavity no less than 150mm – 200mm glass to glass. Reports indicate that a passing diesel bus often creates 85dB of noise. Correctly installed, Granada secondary glazing can reduce noise levels by 54dB, a reduction of 54dB will reduce the noise level to 31dB, which is the equivalent to a whisper.

Can I use Secondary Glazing for Noise Reduction?

Yes! After installing Secondary Glazing you will ensure that your home benefits from reduced noise pollution. The second barrier that Secondary Glazing helps to reduce the amount of noise coming into your home. Helping you to relax in peace!

Will Secondary Double Glazing Reduce Noise?

Of course! Secondary Glazed Windows give an extra barrier between your home and outside world helping to keep noise at bay. Relax throughout the year in peace after Secondary Glazing installation.

What are the Main Benefits of Secondary Glazing?

Sound – If you live on a noisy street where noise from passing traffic and trains is causing a nuisance secondary glazing will help. Granada advises the installation of 6.8mm acoustic glass with the secondary glazed units installed with an air cavity of 150mm to 200mm glass to glass. This installation type is referred to as reveal fix. The slimline and discreet secondary glazing is installed within the window cavity, enhancing the acoustic performance.

How Do I Achieve the Best Acoustic Performance?

Correctly specified and installed, secondary glazing will acoustically outperform all other types of glazing. It is not uncommon to see secondary glazing where double or triple glazing is installed. To achieve up to an 80% acoustic performance, Granada advise the specification of either 6.4mm, 6.8mm or 8.8mm clear acoustic glass and an air cavity, no less than 150mm – 200mm glass to glass. The key to reducing noise levels is to break up the sound waves that pass through the glazed units. The installation of secondary glazing adds an extra barrier, and air insulation prevents noise transference. By selecting the correct glass, and a secondary glazed unit that is expertly manufactured with tight seals and no visible gaps, you will hear a substantial decrease in noise levels. Acoustic reverberation is when multiple panes of glass vibrate at the same time. This can increase noise levels and is often a result of having the same thickness of glass within your primary and secondary windows. We advise the installation of different thickness in the glass, which will help block noise of varying frequencies and help prevent acoustic reverberation. It is important that the secondary glazed units are correctly installed and no gaps are visible between the fabric of the building and the wooden subframe provided. This is why Granada work with the best tradesmen within the UK and often provide detailed training on how to install our products. Reports indicate that a passing diesel bus often creates 85dB of noise. Correctly installed, Granada’s secondary glazing can reduce noise levels by 54 dB. A reduction of 54 dB will reduce the noise level to 31 dB, which is the equivalent of a whisper. Please speak with us directly where our technical sales team will be able to recommend a product and glass type suitable to rectify your problem. Often customers over-specify glass types which increase the cost of the secondary glazing. Our sales team can offer a solution which will suit most budgets while curing your issues.

Can you use Secondary Glazing for Crittall Windows?

Crittall Windows are especially well-served by Secondary Glazing. Adding Secondary Glazing can help to tackle draughts and energy inefficiency which are often associated with Crittall style Windows.

Can you use Secondary Glazing for Leaded Windows?

Yes! Secondary Glazing is an excellent option to improve the performance of your existing windows. It is cheaper than getting replacement windows for your existing ones, and when they are installed to a high standard, you can improve the overall energy efficiency of your home too!

Can you have Secondary Glazing for Bow Windows?

Secondary Glazing can be fitted to the internal of any window in your home, including Bow windows! Even with the curving of a Bow window, you can install Secondary Glazing to help improve the performance of your home. This is possible because our Secondary Glazing is fitted as a separate, secondary unit to your existing window.

What is the Difference Between Face Fix and Reveal Fix?

Secondary glazing is installed by either reveal fixing or face fixing each installation type will increase either acoustic or thermal performance. Reveal Fix – To achieve the optimum acoustic performance, we recommend acoustic glass where the secondary glazed unit is installed with a 150mm to 200mm air cavity glass to glass. The secondary glazed unit is installed within the window reveal enhancing acoustic performance by up to 80% (54 dB). Face Fix – Face fixing is recommended to increase thermal performance. The secondary glazed unit should be installed no more than 80mm away from the primary window. It is installed to the internal face of the primary window, and when taking advantage of Low E glass, customers often see up to a 65% decrease in heat loss.

I have Windows in Varying Sizes and Shapes, is Secondary Appropriate?

Granada’s secondary glazed units are manufactured to order in bespoke sizes and colours. We can bend/arch frames in-house to suit any window size, shape or style. As our products are made to order, we can manufacture units that match both transoms and mullions to reduce sightlines and make the secondary glazing even more discreet. For larger windows, typically commercial applications, we can stack or couple single units to achieve the required coverage.

Which Glass Type Should I Choose for my Secondary Glazing?

Secondary glazing is usually specified to combat two main issues; acoustic or thermal performance. In conjunction with the air cavity, the type of glass specified plays a vital role in rectifying your problem. As standard, all of our products are manufactured with 4mm toughened glass for enhanced security and safety. (Please be aware that other secondary glazing providers may supply float glass which is brittle and can be easily broken. If broken, it can leave large dangerous shards, often resulting in injury). Here at Granada, we provide several types of glass, ranging from different thicknesses to different coatings. Each type of glass has specifically been designed and selected for optimum performance. Sound – Selecting the correct glass and installing the secondary glazed unit with an air cavity of 150mm to 200mm, can drastically reduce noise issues by up to 80% (54 dB). Most traffic noise problems can be rectified with the installation of either 6.4mm or 6.8mm clear acoustic glass. Where noise is a real nuisance, and loud in nature, we suggest the specification of 8.8mm clear acoustic glass. Thermal – Cold draughts breaching your primary windows can make a room feel uncomfortable and makes it uneconomical as the loss of heat will result in higher energy costs. Where thermal performance is required, we advise the installation of either 4mm, 6mm or 8.8mm clear laminate low E glass. Low E glass has a specifically designed coating that reflects heat waves back into the room, thus keeping your it warm in the winter, and cool in the summer. The type of glass specified can increase or decrease your quoted price. It is best practice to speak with us directly as you may over-specify the glass type. Some of our customers and commercial clients specify the highest performing glass, which in turn adds cost. Often we can provide a tailored solution to rectify your issue, which is both cost-efficient and practical for your specific requirements.

What is Fixed Secondary Glazing?

Fixed Secondary Glazing is an independent window that is fitted onto the internal side of your existing window frame. This creates a second barrier between your home and the outside, helping to enhance noise reduction, thermal efficiency and security of your home.

Why add Fixed Secondary Glazing into your home?

When you install Fixed Secondary Glazing into your home, you get an elegant, slimline addition for your property. The external appearance of your home is not altered, but the internal aesthetics are greatly enhanced. The performance of your home is too!

Can I add Fixed Secondary Glazing to a Fire Escape Window?

No, a Fixed Secondary Glazing panel means you cannot have access to the original, existing window. This means that you cannot installed Fixed Secondary Glazing panels to your designated fire escape. This would also not comply with Building Regulations.