8-10 week supply & installation lead time

10 year warranty, 60 year life expectancy

Designed by you, made to measure by us

98% of our customers would recommend us

Whole window U-values as low as 0.8W/m2K

A new build family property in the suburbs of north London. Located close to a busy road in north London, noise levels within the proposed new build property were a primary concern for both developer and client.

The client opted to undertake a road traffic noise assessment to determine what they would need to do on the property to ensure a comfortable living space for their family.  The road traffic noise was found to have a significant impact on the front elevation of the property facing the road and in particular, the bedrooms and measures to reduce internal noise levels would be required.

Why Bereco?

After research into the options available on acoustically performing building products, the client opted for using a glazing within their windows and doors that offered sound insulating properties that would reduce the impact of the road traffic noise on the rooms at the front of the property. A 39dB Rw rated glass was suggested by the acoustic consultants to bring the internal levels down to a comfortable level.

The developer, having used Bereco timber windows and doors on a previous client build, knew being bespoke and having good insulating properties Bereco would be able to find a solution to the client’s desired specification.

Independently tested through Bluesky Certification, Bereco could offer the client not only the acoustic glazing they desired but prove overall window acoustic performance whilst satisfying building regulations.

Brick house with bespoke sash windows and black front door
Slick kitchen with a large window and bi-fold doors

Interesting Fact
Sash windows are generally chosen for their beautification of a property rather than their functionality and performance characteristics. For this project, Bereco supplied 38dB Rw Acoustic Sliding Sash Windows so the client didn’t have to choose between their enhanced specification and design.

Special Requirements
Whilst 39db Rw glazing was specified the client was concerned about the ability of the window to perform and reduce dB levels when the whole window was taken into consideration. Bereco alleviated these issues with the ability to prove the performance of the whole window to 38dB Rw from their independent testing.

We are very impressed with the windows and their ability to reduce noise in our front living rooms and bedrooms. They look beautiful but still offer us our peaceful retreat in London and i’m sure we will enjoy them for many years to come”.

End Client.

The experts in timber windows and doors

Whether you’re a homeowner working on a renovation project for your home, an architect looking for specific windows and doors, or a trade professional building new homes and properties, we offer a tailored service to help you budget, design, and order bespoke timber windows and doors.


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A really good company to deal with. Very helpful team of people from sales, technical support and delivery. Any time I called, I did not have to wait to speak to the right person and help was immediate. So not only great customer service but also terrific products, well designed and exact fit. Competitively priced.

Graham Roberts

I was very happy with Bereco’s service levels and the products are excellent, very good quality. I would have no hesitation in recommending them to others.

Simon Hazelton

Beautifully constructed windows which do the job perfectly. Handled Covid disruption effectively. Installation went smoothly. All in all a job very well done. Would recommend without reservation.


Visited the showroom last year and impressed with the finish and quality. Just as delighted with the windows and back door that we ordered. They look fabulous.


Our memberships & schemes

As a dedicated manufacturer of quality timber windows and doors, we are part of a number of specialist memberships and schemes. Check out the full list below.

The Anti-Greenwash Charter logo
ASBP logo
BlueSky Certification logo
FSC and Forests For All Forever
Good Homes Alliance logo
Secured by Design certificate
World Land Trust logo
Graphic of FENSA certificate

As seen in...

We’re pleased to announce our brand has featured in several national magazines and publications over the years. Here are some of the most recent places our products have been showcased.

The Times logo
Grand Designs Magazine logo
House and Garden logo
Homebuilding & Renovating logo
Construction Forum Magazine logo
Architects' Journal
Improve logo
Showhouse logo

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