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24 27 LINDEN GARDENS, NOTTING HILL, LONDON


STEEL


Inserting a new steel framework to support the reconfiguration of the rear of the building at lower ground, ground and first floors, had ramifications for the use of glass


four, another duplex on the third and top floor, have a transparency that allows you to see right through from the front to the rear of the building.


Fire-safe glass challenge


However, that drive for transparency meant jumping an important safety hurdle in apartment one. Coathup explains: “To get our front-to-back transparency on the ground floor, we needed glass that would separate the main staircase from the adjoin- ing living room, dining/kitchen space and the main entrance to the apartment. “This needed to be fire-rated construc-


tion, which means the glass had to have insulating and integrity qualities to stop fire and radiation. That represented a challenge which required a relatively innovative answer: a frameless system of two fixed, glass walls and pivot doors that was as transparent as possible but still insulated and fire-rated.”


Creighton takes up the story: “There are limited fire glazing systems that are appro- priate for the domestic market. Other systems tended to have very heavy framing surrounding the screens and the door


systems.” After some time searching for a supplier of the right tried and tested product, and after a couple of potential solutions proved to not be what they were looking for, HUB and Fruition Properties eventually chose the Lunax system. “It ticked all the boxes,” says Creighton. The system, which was created by a Belgian company and is sold through dealers in the UK, uses Contraflam glass, a product that met the insulation and integrity requirements HUB and Fruition Properties were after.


Supplied by Saint-Gobain subsidiary company Vetrotech, the Contraflam glass offers from 30-120 minutes of integrity and insulation (EI30-EI120 classification). This refers to the amount of time it will protect against fire, smoke and hot gases, acting as a heat shield and keeping the non-fire side cool.


It comprises two or more sheets of tough- ened safety glass with the cavity between the sheets filled with a transparent intumes- cent gel interlayer that reacts chemically when exposed to fire and expands to further bolster the glass. It has been used at locations including the International


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ADF MAY 2017


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