Granada Glazing

Granada’s secondary glazing solves noise and thermal issues in Grade II listed city apartments

  • 25 Mar 2021

Acoustic secondary glazing manufactured and supplied by Granada Glazing has created warmer and quieter apartments for residents in Murrays’ Mills, Ancoats, formerly the world’s oldest steam powered cotton mill.

Dating back to 1797, the seven-storey Grade II & IIlisted buildings in once the beating heart of industrial Manchester have been sensitively restored for residential use.

The 107 apartments retain many historic features, such as exposed brickwork walls and multi-pane, sash and bay heritage windows.

Due to the buildings’ city centre location and the retention of single-glazed windows, secondary glazing was specified to reduce outside noise intrusion and improve the thermal efficiency of some apartments.

Improve acoustic performance

Granada’s technical team worked in partnership with experienced soundproof experts City Installation on the design of the high performing aluminium units with 6.4mm acoustic laminate glass to improve the acoustic performance of the original primary windows.

Acoustic laminated glass, with its acoustic Polyvinyl Butyral (PVB) interlayer that absorbs the sound, offers enhanced sound insulation that can reduce noise levels by as much as 80% (54 decibels).

For heritage and listed buildings with single glazed primary windows, installing secondary glazing is often the preferred option for creating a warmer, quieter and more secure environment with the original windows intact.

Slimline aluminium frames are virtually invisible, maintaining a building’s charm and character while bringing the glazing system firmly into the 21st century.

Granada Glazing

The project presented some challenges, as Adam Turner, Director of City Insulation, explained.

“As the building is so old, it came with a couple of quirks; namely the steel bars that run across the front of some of the windows requiring secondary glazing, which made for a tricky installation,” he said.

“We overcame this by disassembling the unit and reassembling it behind the bar before fitting it.

“Granada Glazing’s service and delivery is always excellent. The secondary glazing not only performs and looks discreet; it solves our customers’ problems.”

‘The draughts have disappeared’

Commenting on the difference secondary glazing has made to ‘three old and draughty windows’, one Murrays’ Mills resident said: “The noise from cars below has been drastically reduced and the draughts have disappeared, leaving us with a warmer and more peaceful flat.”

Another praised Adam and his team for overcoming ‘tricky building quirks’ and still delivering a ‘superb finish’.

“We cannot believe the difference in noise reduction and are very grateful for the decent night’s sleep we now get. 10/10!” they said.

Acoustic secondary glazing has made a huge difference

External sound reduction was a key issue for a third apartment owner, who observed: “The acoustic secondary glazing has made a huge difference to the traffic noise. The work is high standard, and the glazing is really high quality – would fully recommend!”

Suitable for all property types, Granada’s slimline aluminium secondary glazing frames can be powder coated in over 200 RAL colours.

Virtually invisible, they blend in with any interior décor. The Granada Glazing product range encompasses hinged, sliding, vertical sliders, including tilt back, and lift-out options. Full training and marketing support is available to installers nationwide.

Visit the website


Granada Glazing
Campbell Way
S25 3QD

Phone: 01909 499 899
Fax: 01909 499 900
Email: [email protected]

Twitter: @GranadaGlazing


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