The specialist decided to retain the existing joist structure and use its Grad ‘invisible fixings’ deck system to provide a new treated softwood surface.

The extremely low build up height of the Grad system meant that Alfresco Floors could install all the rails, clips and boards onto these existing joists without much change to the original floor height.

The Grad system uses a patented clip fixing which locks into specially milled grooves along the underside of each board, so it leaves no fixings on show either on the surface or even in the gaps between each board.

The finished deck is part of a major transformation of the Royal Opera House by architects Stanton Williams and has been open to the public since September.