Scheme Summary
As part of a larger estate renewal programme, the 2 phase scheme comprises a 36 unit extra care facility and 24 properties in phase 1, with a further 22 properties in phase 2. Phase 1 was completed in 2000 and phase 2 is due on site February 2001.


Scheme Details

The main development consists of 157 properties. Anchor Trust is building a 2 phase environmental development to further improve the environmental performance of properties and add to the quality of life for residents. All 157 properties are built to Liverpool Housing Action Trust's Design Standards. As a result of this they all achieve BRE's Environmental Standard Award (now EcoHomes) and NHER 9.


Environmental Features

Phase 1

Phase 1 consists of a mix of 24 houses, bungalows and flats and a 36 unit extra care property. Properties are built in brick and block using environmentally friendly materials and high levels of insulation. Phase 1 acts as a control development for Phase 2, with footprints and layouts being maintained as standard where possible.

Heating is provided by a wet radiator system with a combination boiler. SAP ratings range from 84 - 87.

Water saving appliances include 6 litre low flush WCs and low flow taps. These are complemented by communal water recycling systems. The 24 properties include rainwater recycling and the extra care scheme incorporates greywater recycling. It is anticipated that water consumption will be cut by 25-30%. These systems are being monitored against the rest of the development to determine effectiveness and actual savings.

Phase 2
Phase 2 consists of a mix of 22 properties constructed on the site of a former tower block. This phase seeks to embrace sustainability in a more holistic way and provide a blueprint for sustainable living.

Two types of construction methods are being employed: brick and block and timber frame.

The brick and block properties will have concrete upper floors and ceilings to provide high thermal mass that will act as a thermal store. High levels of mineral wool cavity insulation complement this.

The timber framed properties are insulated with 200mm of cellulose. Generally they will be clad in brick, but timber will be used in some cases for high level cladding.

To assist in reducing energy demand the super insulated homes will be orientated to maximise passive solar gain. Solar shading has been integrated into the design to prevent over-heating in summer; 600mm overhanging eaves and lattice work on larger windows provide the shading.

The orientation and fabric specification has resulted in properties with a much reduced theoretical heating demand of 2.5 kW. A conventional heating boiler usually provides 7 - 24 kW and is over-sized for the properties. A compromise has been made through the installation of a standard domestic combination boiler of 4kW - the smallest boiler available at the time of the development. Although other less conventional heating systems could have been installed, it was important for a heating system to have familiar controls, as the client group is predominantly elderly people.

As in Phase 1, a communal rainwater recycling system will be installed.

Photovoltaic panels will be installed to all homes, converting the sun's energy into electricity. This will be used directly by households. Any excess energy will be exported to the national grid.

The sun's energy is also being harnessed for water heating. Solar panels heat water which is stored in a twin coil water cylinder. This will reduce energy consumption (and bills) and further reduce CO2 emissions for the development.


Recycling Opportunity

The demolition of the tower block provided the opportunity to assess the practicability of recycling the building's fabric. Materials were recycled on or off site. Opportunities are being investigated for recycling material in new foundations. Original steel balconies and decorative steel panels will be reused in boundary walling, if safe removal is possible. Pavings, kerbs and edge channels will be re-used and other construction waste will be used for hardcore. Although bricks could not be reused, locally produced bricks will be used, recycling bricks that would otherwise be wasted as they did not match up to the manufacturer's required colour.

All systems will be comprehensively monitored to inform future development decisions.


Costs

The two phase scheme will cost in the region of 2.4 million. 1million has been provided through the ERDF. The remainder of the funding has been secured from the Single Regeneration Budget, Liverpool Housing Action Trust, Liverpool City Council and the private sector. The extra over cost for Phase 1 is 224,000. The rainwater and greywater recycling systems cost on average 10,300 per unit for the houses and bungalows, and 1,300 per unit for the 36 unit extra care facility. Phase 2 costs are yet to be finalised.


Developer's Comments

One of the main objectives of the European and SRB funding is to disseminate information on sustainable technologies to Small to Medium sized Enterprises (SME's) in Merseyside, as a true demonstration project. The project team have been involved with this development for over two years. They aim to pass on as much of the information, which has led to informed decisions, to interested businesses at structural training and open days. Whilst 'partnering' appears to be the latest buzzword, this project has demonstrated how committed the professionals and organisations involved with the project have become at ensuring it's successful delivery and completion, in a true partnering sense. The culture has very much become one of solving problems, rather than apportioning blame for its cause.

Contact: Andrew Upton,
Project Development Workshop,
98 Duke Street,
Liverpool, L1 5AG
Tel 0151 708 9010
Fax 0151 708 5030
Web www.pdwliverpool.co.uk
Email info@pdwliverpool.co.uk