Almost as standard, raised access floors are used for the distribution of services in the UK, yet they’re high in carbon, hard to recycle and aren’t used in many other parts of the world… is it time for a re-think?
Access floors, through which power and data cabling to serve desks are run, are typically 150 mm deep (the minimum recommended by the British Council for Offices (BCO) though can be less than this, or significantly more if the floor needs to accommodate pipework or ductwork for displacement ventilation.
What if we removed the raised access floor?
- The embodied carbon of the floor system, estimated at 50 kgCO2/m2, would be saved
- Associated materials would be diverted from complex recycling processes and/or ultimately landfill. Whilst companies such as Kingspan are able to provide Environmental Product Declarations (EPD)1, which is a step towards positive change, tiles are typically made from particle board encapsulated in steel sheet which makes them difficult, if not impossible, to recycle. Re-use of tiles is a valid option, however feedback from agents is that the impression given to a prospective tenant by a shiny new floor is valuable hence there is a reluctance to use recycled tiles. Timber encapsulated tiles are also an option and have a pleasing aesthetic though consideration must be given to the cost and longevity
- All services including ductwork must be run at high level. Power and data must be wireless or distributed via power-poles or ‘umbilicals’ to drop services from the ceiling space to desks
- Screeds may be required to ‘level’ floors which deflect towards the centres, these screeds have their own financial and carbon costs
- Offices would be quieter; would we miss the echoey sound and ‘bouncy’ sensation which comes from walking on raised floors?
- Agent feedback is that a scheme which doesn’t include a raised floor could be less desirable to potential tenants and may even attract less rent due to a perception that it is of a lower specification.
“Unfortunately raised flooring has become hugely commonplace amongst occupiers, so any major office scheme that doesn’t provide them may effect desirability and alienate the pool of demand”
Michael Raibin, Compton Real Estate
‘Power-poles’, ‘droppers’ or ‘umbilicals’ from high level to desks are often cited as being unsightly and a key reason for retaining a raised access floor. However, these aesthetic challenges are not insurmountable as shown in the images below taken from NDY projects; dado trunking, skirting trunking and in-desk power are all used to good effect.