黑洞社区

The drive to decarbonise the nation鈥檚 new build housing stock was dreamt up in the mid-2000s during the high noon of New Labour. Unlike many of the previous government鈥檚 initiatives, the zero carbon standard survives, but in a much diminished state.

The introduction of crucial new Part L Regulations has been delayed, a host of projects look set to be exempt from the standard and even the definition of a zero carbon home has been altered. Concern is mounting that zero carbon is an increasingly lost cause.

To investigate how well founded these worries are in the run-up to next year鈥檚 general election, 黑洞社区 recently assembled some of the leading lights in the sustainable construction field for a roundtable, which was sponsored by Celotex.

David Mitchell, technical director of the Home Builders Federation, argued that the very term zero carbon should be looked at afresh. 鈥淲e won鈥檛 be building zero carbon, we鈥檒l be building low carbon or low energy. Perhaps we should change the definition. I would not be selling a zero carbon home as regulations currently stand,鈥� he said.

Austin Baggett, managing director of National Energy Services, said the term zero carbon also failed to tick the boxes in marketing terms. 鈥淚t鈥檚 the most dreadful term for galvanising consumers.

鈥淲e have made huge strides as an industry; we just need to modify where we are going in the light of experience and what we now know.鈥�

David Adams, technical director of Willmott Dixon, wasn鈥檛 hung up on the term zero carbon. But he argued that it was a useful reminder of the project鈥檚 ultimate goal, which is to ensure that new build homes don鈥檛 frustrate efforts to meet the UK鈥檚 carbon reduction goals. 鈥淚t [zero] is a nice number because it holds us to something,鈥� he said.

Adams, who used to head the Zero Carbon Hub thinktank, said he 鈥渃ringed鈥� at the prospect of going back yet again to the drawing board. It wouldn鈥檛 even be worthwhile given that the current framework enjoyed a high degree of consensus and any changes were unlikely to be significant.

鈥淐hange is really quite disruptive for our business. We would like to land somewhere we can have some stability and really maximise efficiencies without constant changes.

鈥淟eave it up to builders to determine how they market, but don鈥檛 let us throw the regulations up in the air again. We just want to know what the standards are going to be. It鈥檚 not perfect and will never be perfect, but let鈥檚 get on with it because we are spending too much time navel gazing,鈥� he said.

Chris Twinn, formerly of Arup and now running his own consultancy TwinnSustainabilityInnovation, agreed. 鈥淭his is one of the few things that has survived this government and probably would have been thrown out if it had not had this label.鈥�

Rory Bergin, partner at HTA Architects, argued that the problem wasn鈥檛 the zero carbon definition itself but the lack of government leadership on the issue.

鈥淲e need government to work harder on defining the road map. At the moment we are on the road somewhere but God only knows what cul-de-sac or lay-by we are in,鈥� he said.

鈥淧art of the problem is the revolving door of the housing minister. We haven鈥檛 had anybody who has given this the serious attention it deserves. The industry is paying the price for a lack of seriousness at the highest level: no one has been willing to grasp the nettle.鈥�

Ross Holleron, associate director of the Zero Carbon Hub thinktank, said that there was greater continuity at the level of officials. However, he expressed concern that tweaks to the SAP and Part L Regulations still needed to be consulted on. If this didn鈥檛 happen before March, he warned that the changes could be delayed by pre-election purdah, potentially holding up progress for another six months.

And Adams argued that with the fabric energy efficiency standards already in place, the leap from the current Part L Regulations to the 2016 zero carbon standard is achievable. With the use of renewable technologies and allowable solutions, he said they could be achieved.

However, the fundamental worry for eco-enthusiasts like Adams is that in key respects, the government is backtracking on its own zero carbon agenda.

This is most apparent in proposals to lift the requirement to build to the zero carbon standard on small schemes. Barely a week after the roundtable took place, the Conservatives used their annual party conference to extend this easing to homes for first-time buyers.

Baggett defended the proposed small sites relaxation on the grounds that it would benefit smaller housebuilders by providing them with the breathing space they needed to get up to speed with the regulations.

The HBF鈥檚 Mitchell agreed: 鈥淭he small builder will be hit harder by new regulations because he doesn鈥檛 have three to four years of developable land and he doesn鈥檛 benefit from the bulk discounts of the larger developers.鈥�

Stewart Dalgarno, director of product development at Stewart Milne Homes, suspected that larger housebuilders could use the relaxation as a ploy to get round the 2016 standard. 鈥淭he definition of small sites is one that bigger boys can use by building a 300 homes site in chunks of 30,鈥� he said.

Bergin could see no technical justifications for exempting small sites. 鈥淚t鈥檚 not as if carbon compliance has much to do with the scale of the development. In my experience, smaller developers tend to build to higher standards than bigger developers because they are targeting groups of people in the local community who will probably want higher performance,鈥� he said.

Applying different standards in the market place would just sow confusion, he warned. 鈥淭he scenario of having developments on sale on the same street at 2010 and 2016, or even 2002 regulations, is baffling for consumers.鈥�

Twinn鈥檚 response to this conundrum was to scrap the legislative framework governing zero carbon housing. He said: 鈥淲e [the industry] are better at making judgments for what is effective about the future of our industry.鈥�

Adams didn鈥檛 go that far but suggested that regulation was a second best solution to persuading consumers to buy into the concept because they value the energy bill savings it leads to.

However prospective purchasers are a long way from this point. Rob Warren, Celotex head of technical, said: 鈥淭he market is driven by the end consumer and they are still choosing on the basis of bathrooms and kitchens and location: until that changes 鈥� it鈥檚 going to be really hard to change things.鈥�

Once consumers understood the value of low carbon emissions though, Bergin said that developers could charge extra for features like adding solar photo-voltaic cells on the roof.

One way of crystallising these benefits is to link them to financial incentives. Just the day before the roundtable took place, the House of Commons Energy and Climate select committee had recommended giving householders council tax discounts in return for measures to improve their properties鈥� energy efficiency.

Adam said nudge mechanisms like this could help push people to adopt zero carbon technologies.

Dalgarno agreed: 鈥淭hat council tax discount has a value that creates market traction.鈥�

Despite the slow progress on the zero carbon framework, Twinn said the industry should recognise the strides it had made on minimising emissions.

鈥淭o have got this far so fast is an incredible reflection on what this industry is able to do. We are very good in the UK at navel gazing and kicking ourselves when we are ahead of the game.鈥�

Nevertheless, he warned that easing up on the zero carbon drive could store up problems for later when the homes being built today may need to be refurbished to meet more exacting emissions standards. He said: 鈥淲e are building in a legacy of existing stock which is arguably more difficult to upgrade.鈥�