24 Emery Rd, Brislington, Bristol BS4 5PF, United Kingdom
01179 717880 07774 273618
4.8
Merry Christmas from Crystal Clear! Please note: We will be closed from Wednesday 24th December to Sunday 4th January 2026.
CONTEMPORARY STYLING, HIGH QUALITY, AWARD-WINNING MANUFACTURER

Secondary Double Glazing in Bristol – Energy Efficiency Without Replacing Your Windows

Secondary double glazing is the perfect solution for flats, houses, and commercial properties in Bristol that need better noise reduction and thermal insulation. It’s especially ideal for homes where modern replacement windows would compromise the property’s character, or for Listed and Conservation Area properties where full window replacements are not permitted.

With secondary double glazing, your original windows can be upgraded to improve energy efficiency without being removed or damaged. This includes adding double glazing, draught-proofing, and sealing – all while preserving your home’s look.

Beyond improved thermal performance and acoustic insulation, secondary double glazing also enhances your property’s security, giving you peace of mind and comfort.

Secondary Glazing for a home in Bristol.

Choose a product from Crystal Clear

Independently hand picking the finest materials and the best suppliers in the industry, we are proud to be partnered with award-winning manufacturers who deliver the highest quality of product.

Sash window style

Here we show how the introduction of secondary glazing can be completely in keeping with the original windows and this is perfect when insulating windows that are within a preservation area. White Aluminium and energy saving glass with slimline effect with no visible external effect. All of our fitting teams have benefitted from attending Origin’s own training school. What's more, Crystal Clear support and offer Origin’s 20 year warranty on all Origin Bi-fold doors.

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Sliding windows

Sliding sash style windows insulated with white Aluminium secondary glazed units. White Powder coated secondary glazed units with acoustic glass for sound insulation, also the easy clean option enables you to tilt the window in for very easy cleaning.

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Horizontal sliding windows

Horizontal sliding secondary glazed window which enable the full use of original window with excellent thermal and sound insulation. White or coloured powder coated aluminium secondary units can be fitted directly to the inside of your window or produced using hardwood sub-frame which enables the secondary window to be fixed to suit any application.

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Performance Of Secondary Glazing

When choosing energy-efficient windows, it’s important to understand how they are rated. The window rating system evaluates three key performance aspects:

U-Value (Heat Loss): Measures how well the window retains heat, keeping your home warm and reducing energy bills.

G-Value (Solar Gain): Indicates how much solar energy the window allows into your home, contributing to natural heating.

L-Value (Air Leakage): Indicates how well the window prevents air leakage, maintaining comfort and efficiency.

While these ratings apply to the complete window (frames and glass combined), the glass itself plays a significant role in achieving high energy efficiency.

At Crystal Clear, we offer a wide range of energy-rated windows suitable for homes across Bristol and the South West. All our windows carry the Energy Saving Recommended logo – a mark awarded to the most energy-efficient windows that help reduce energy consumption and contribute to tackling climate change.

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Secondary Glazing for a home in Bristol.

Benefits Of Secondary Glazing

Upgrade your Bristol home with Crystal Clear energy windows and enjoy a range of benefits:

  • Significant Reduction in Condensation: Our energy-efficient windows can reduce condensation by up to 70%, helping to prevent the growth of mould, bacteria, and dust mites. This is especially beneficial for households with respiratory conditions.

  • Enhanced Noise Reduction: Experience a quieter home with up to 2 dB of noise reduction, creating a peaceful sanctuary away from Bristol’s bustling streets.

  • Outstanding Heat Retention: With a 94% reduction in heat loss, Crystal Clear windows keep your home warm while reducing unnecessary energy waste, saving you money on heating bills.

Looking to improve your home’s energy efficiency in Bristol? Contact our expert team at Crystal Clear today, and our friendly experts will answer all your questions and guide you to the best window solutions for your property.

Areas we cover in Gloucestershire

Based in Bristol, Crystal Clear proudly serves customers across the South West, including Gloucestershire and South Gloucestershire. We frequently supply and install energy-efficient windows in the following areas:

  • Cheltenham
  • Gloucester
  • Stroud
  • Cirencester
  • Chipping Campden
  • Chipping Sodbury
  • Forest of Dean
  • Thornbury
  • Tewkesbury
  • Wotton-under-Edge

No matter where you are in the South West, our expert team is ready to provide high-quality window installations that improve your home’s comfort, energy efficiency, and style.

Secondary Glazing for a home in Bristol.

What our Customers say about Crystal Clear

A good experience with Crystal Clear
Helpful staff in the showroom. Easy ordering process at a competitive price. Installation team was very good and efficient, no mess. End result looks brilliant.

Mr Bushell

Excellent service from
The 2 men who fitted the door were fantastic , they explained everything that was happening and did a really good job , the man who sold me the doors was also very helpful and made things really simple .

Laura Humphries

Very pleased with this company
I had some new windows and exterior doors fitted and the quality of the products seems very good. The company is easy to deal with and kept me informed. The installers, Kevin and Jason, were professional, friendly and polite. They came when they said they would, did an excellent job and tidied up before they left.

Sharon Absolon

Quality products, fitted extremely well.
Extremely happy with my new front door, from date of placing the order to it being fitted I was kept informed.
The guys that fitted it were very knowledgeable and fitted my door, cleaned up and checked if I was happy before they left the property.
I would definitely recommend this company to others.

katie

Efficient and knowledgable
Kevin and Jason did a great job and were efficient and speedy in replacing 5 windows, with the minimum of disruption. There was a measurement error with one of the window casings and they arranged for a new one to be manufactured and installed within 24hrs. Worked around scaffolding that was already on the building.

Pete Jones

NO PRESSURE TO BUY ..
I have personally visited Crystal Clear showroom and spoken to the owner twice Louis and Jamie ..i have not known anyone to put so much effort into explaining their produts to customers …they take their time to answer all your questions..here’s the best part ..NO PRESSURE TO BUY AT ALL ..take your time when you are ready let us know ..absolutely amazing company to work with ..definitely recommend and must visit the showroom in Broomhill Bristol and

…see for your self…

Khalil Khaliq

Excellent from start to finish
From the start the company were very helpful and professional. We wanted a larger window and they advised us on the design possibilities. Ordering was easy and they explained the process. The fitters were very clean and tidy. The window was fitted with minimal disruption, the result was better than we hoped for ! Overall we would recommend this company 100%

sharon drew

Really love our new bifold doors
Really love our new bifold doors. The whole team were helpful & efficient throughout. The fitters Steve & Tom were on time, polite & informative, discussing any minor asjustment options as work progressed. They also tidied up after themselves each day. Over all a great job. Thankyou

customer

Thank you Crystal Clear
Crystal Clear provided a first class service from first enquiry at their showroom through to the final installation which was completed by a very professional team who took careful attention to detail. An excellent product which met all our expectations – highly recommended!

Geoff Brooks

Good interior doors
The process from start to finish and everybody from the showroom staff, pre-install survey to the fitters were helpful and efficient.
Steve and Tom who fitted our interior doors were friendly and polite, did a great job and left everything nice and neat. The doors feel like quality and we’re really pleased with the final result.
Wouldn’t hesitate to recommend.

Matt Smith

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