Extraglaze Secondary Glazing - Contact Details

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  • 3 weeks ago
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    Secondary glazing
    Service rating : They did what was agreed
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  • 4 weeks ago
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    Service rating : Professional , great service, highly recommend
    The Golden Ball Inn, Ironbridge
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  • 4 weeks ago
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    A superb job. The panels are virtually invisible and the house is warmer.
    Nick Symington, York
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  • 2 months ago
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    Go for it!
    Product : Easy to fitted almost invisible.
    Michael Thorneloe, Wirral
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  • 2 months ago
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    Extraglaze does the business, from start to finish
    Service rating : Communications very good particularly around delivery
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  • 3 months ago
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    Great Product!!
    Service rating : Easy to fit and look great
    Good communication
    Kitson Thomas
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  • 3 months ago
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  • 3 months ago
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  • 4 months ago
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    Extraglaze Secondary Glazing is a superb product , easy to install , removable as it’s magnetic and Accepted by conservation . Good choice of colours to match frames.
    Show more ...
  • 4 months ago
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    Andrew Quirey

Extra news

Veritherm case study – Extraglaze comes out top

Extraglaze was installed as part of a real life case study, in a real home, and the results measured and reported by Veritherm.co.uk

Read more …

Green Homes Grant

(announced 7th July)

Important update for October 2020: Extraglaze has given great consideration to the Green Homes Grant, and has declined to take part.

Read more …

Extraglaze at the National Trust offices, Hidcote Manor Gardens

February 2020

We are very proud to have installed our magnetic secondary glazing at the National Trust's Hidcote Manor Gardens, in the staff offices – to keep everyone warm in rooms where other potential secondary glazing solutions had been considered out of the question.

Read more …

In a nutshell the answer is simple: fit secondary glazing. It will provide more sound proofing than any other remedy (short of bricking up your windows).

Understanding the problems (and the design factors)

Secondary glazing is a very effective sound proofing measure. In comparison, double glazing and triple glazing are often not. Even so-called “acoustic glass” offers little added benefit over standard glass. Sometimes it's best to ask neighbours how they got on with their sound proofing measures of that type, but witness it yourself, don't just take their word for it.

Secondary glazing can certainly reduce noise, significantly. Though it also depends on the following (this is not an exhaustive list):
  • type of noise. For example road noise is readily cured, aircraft noise is not. They differ significantly in frequency and energy
  • how far the windows are from the source. For example traffic/lorries driving past only a few feet away, because there is no front garden
  • full-on sound. For example street noises may be bouncing back & forth amongst close-knit buildings in a narrow town centre.
  • how thick the walls are, and the materials used in construction. The foundation and dwarf walls of a bay window are often much lighter than the main walls and may have little defence overhead if they have their own roof, therefore letting in a lot of extra sound.

Predominantly the effectiveness of your sound proofing measures is a factor of:
  • how well the existing windows are already sealed. If your windows are draughty then secondary glazing will seal them, and make a huge difference.
  • how much gap distance you can achieve between the existing and the new glazing: the more the better. 40mm should be considered a minimum gap; 100mm gap is a good target. Beyond 125mm the benefit per additional 10mm of gap tails off
  • on windows that are already well-sealed, creating a gap of less than 45mm will probably disappoint you. But in some cases it's all you can do
  • if your room is inside or directly under a roof (so you have sloping ceilings) then this will be the weak point: it's very likely sound will still come through there despite seconday glazing
  • your internal decor - it'll be much, much better for having: a carpet or substantial rug; soft furnishings; curtains instead of blinds; no piano (!)
  • you must consider sound proofing your entrance door(s), i.e. your hallway, as this can be a serious weakness in any scheme you put into place
  • Note too: choose secondary glazing with smaller panels in strong frames i.e. the stiffness helps.

Can I sound proof my PVCu windows, or replace them with better?
Yes, is the simple answer. But the longer answers are...
  • the handles on your windows will very likely stick well out from the existing PVCu surfaces, so immediately you will recognise these as an obstruction to secondary glazing, however, in any case...
  • for a good gap distance (explained above, using secondary glazing) you must fit a new perimeter frame, closer in to the room, for the secondaries to fit on. Providing the windows are already giving you good thermal insulation then this gap can be any size, from 60mm upwards. The depth of reveal in your wall may dictate the maximum, or how much window sill depth you are prepared to lose. The deeper the better for sound proofing. For the best soundproofing we would even recommend two layers of secondary glaaing, but you should try one layer first, in case that does the trick nicely.
  • replacements can be very effective: we would recommend you get some first-hand testimonials on your choice of product, by visiting homes that have that system installed and listen to the results when opening and closing their windows (with traffic, etc, passing outside of course). For the most part new windows, when fitted well, offer a first rate seal (as opposed to old and weathered). You should check the quality of the seals in your existing windows.
  • secondary glazing will always improve soundproofing, providing there are no other weakspots in your room, where sound is also coming through. Such weakspots must also be fixed.


Is double glazing or triple glazing better?

Double glazing and triple glazing can certainly let you down dramatically on the sound proofing (it can be little or no better than well-sealed single glazing in this respect)*. Triple glazing may have less sound proofing than double glazing - we recommend you research this by asking your potential supplier for technical information and comparing the two types. Don't just accept their verbal assurance. Secondary glazing on the other hand is a very well respected choice for sound proofing. We've achieved as much as 75% reduction of noise after fitting secondary glazing.

*One customer came to us for help. She had recently purchased large triple glazed, PVCu bay windows, at considerable expense, for her lounge and main bedroom. They were just as noisy as, if not worse than, the windows they replaced. We designed and built a new solution just for her, with a 60mm gap between the inner glass of the triple glazed windows and our Extraglaze Secondary Glazing. Now she can barely hear the buses passing the end of her front garden. The thin dwarf walls of the bay do let some sound through, but we only noticed it because we are fussy.


Magnetic secondary glazing v's aluminium framed secondary glazing
With either system it is common to look out of your window to watch cars drive past and not hear them. Both systems are good for sound proofing. Aluminium frames can, but not always, look a bit like windows installed on top of your existing windows. Whereas Extraglaze magnetic secondary glazing can be genuinely inconspicuous. 

Magnetic
This is typically installed straight on to your existing window frame. On casement windows this usually achieves a gap less of 40 to 50mm. On a sash window it will achieve a gap of about 50mm on the lower half, and 125mm on the upper half. For even better sound proofing you need to add more gap*, by adding a very slender superficial frame, to provide surfaces for the magnets to adhere to. The magnets make an excellent seal.

NOTE: if your magnetic secondary glazing panels is large/heavy and exposed to hot sunshine then it will need to be taken off the window in the summer, to prevent overheating. This means you will lose your soundproofing.

Aluminium Framed
If you have thick walls and therefore a deep reveal, then aluminium frames lend themselves to being fitted further away from the existing window i.e. for the best achievable gap. A superficial timber sub frame is necessary, unless you are offered a “reveal-fix” method. Unfortunately doing it this way “eats up” your available window sill.  This and the prominence of the frames may be unsightly to you. With a large gap (about 125mm or more*) an excellent result is achieved - providing the system you have installed also makes an excellent seal.

*NOTES: as you increase the gap beyond 125mm the extra benefit diminishes, so you have to add a lot more gap. If however, it is practical for you to add a second layer of secondary glazing (probably requiring a timber sub frame fixed to the reveal) then you will get the very best result possible.

Acoustic glass
You can consider having acoustic glass in your windows. It will be very expensive. If you were able to stand in your room with acoustic glass and instantly switch to non-acoustic glass you would be exceptionally lucky to have ears that can tell the difference. Special machines that measure in decibels can record the difference. Architects specify acoustic glass even when the improvement it makes is very small indeed. Of course it will depend on other factors too, such as the frequencies of the noises outside, and the thicknesses of the glazing in the window sandwich. If you have it installed as secondary glazing then make sure it is a different thickness to the existing glass.


 
Some quotes from Extraglaze Secondary Glazing customers:

 

“I have installed Extraglaze panels on 11 sash window in a grade two listed building dating back to 1799. I feel this is a great success. They are unobtrusive, very effective at reducing noise, good at reducing condensation and help enormously with heat insulation.”
 
“On a rating of 0 to 5, we would give the Extraglaze panels that you made and installed for us a rating of 5 for making our house warmer, 5 for reducing noise and 5 for the pleasing appearance of our windows. We were equally pleased with your modest pricing of our Extraglaze panels. We had almost given up hope of finding double or secondary glazing that would give us all these benefits and still enable us to retain the lovely original glass in the windows of our hundred-year-old house - until you were referred to us. We are simply delighted with the result.”
 
“A couple of days after [installing Extraglaze], Northumbria Water decided to drill right opposite our house but the elegant glazing really deadened the sound although we could hear it upstairs as one of the panes was off at the time.”
 
“We live in the centre of Shrewsbury in a listed building which has sash windows - and wooden shutters. The Extraglaze fitting was done without the need to adjust either the windows or the shutters. The units are both discrete and flexible, and can be moved readily to open the windows. The noise reduction is marked - probably 50-60% reduction - very noticeable living in the town centre. A very professional outfit with a first rate product - we are delighted with the results.”

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Reviews

  • 3 weeks ago
    • ratings
    • ratings
    • ratings
    • ratings
    • ratings
    Secondary glazing
    Service rating : They did what was agreed
    Show more ...
  • 4 weeks ago
    • ratings
    • ratings
    • ratings
    • ratings
    • ratings
    Service rating : Professional , great service, highly recommend
    The Golden Ball Inn, Ironbridge
    Show more ...
  • 4 weeks ago
    • ratings
    • ratings
    • ratings
    • ratings
    • ratings
    A superb job. The panels are virtually invisible and the house is warmer.
    Nick Symington, York
    Show more ...
  • 2 months ago
    • ratings
    • ratings
    • ratings
    • ratings
    • ratings
    Go for it!
    Product : Easy to fitted almost invisible.
    Michael Thorneloe, Wirral
    Show more ...
  • 2 months ago
    • ratings
    • ratings
    • ratings
    • ratings
    • ratings
    Extraglaze does the business, from start to finish
    Service rating : Communications very good particularly around delivery
    Show more ...
  • 3 months ago
    • ratings
    • ratings
    • ratings
    • ratings
    • ratings
    Great Product!!
    Service rating : Easy to fit and look great
    Good communication
    Kitson Thomas
    Show more ...
  • 3 months ago
    • ratings
    • ratings
    • ratings
    • ratings
    • ratings
  • 3 months ago
    • ratings
    • ratings
    • ratings
    • ratings
    • ratings
  • 4 months ago
    • ratings
    • ratings
    • ratings
    • ratings
    • ratings
    Extraglaze Secondary Glazing is a superb product , easy to install , removable as it’s magnetic and Accepted by conservation . Good choice of colours to match frames.
    Show more ...
  • 4 months ago
    • ratings
    • ratings
    • ratings
    • ratings
    • ratings
    Andrew Quirey

Extra news

Veritherm case study – Extraglaze comes out top

Extraglaze was installed as part of a real life case study, in a real home, and the results measured and reported by Veritherm.co.uk

Read more …

Green Homes Grant

(announced 7th July)

Important update for October 2020: Extraglaze has given great consideration to the Green Homes Grant, and has declined to take part.

Read more …

Extraglaze at the National Trust offices, Hidcote Manor Gardens

February 2020

We are very proud to have installed our magnetic secondary glazing at the National Trust's Hidcote Manor Gardens, in the staff offices – to keep everyone warm in rooms where other potential secondary glazing solutions had been considered out of the question.

Read more …