Low Energy Buildings Database

Passiv Haus Retrofit: refurb and regenerate

This is a highly innovative and truly inspirational project, which incorporate the principles behind PassivHaus within the extensive refurbishment of the property. By combining works in the right order, we will maximise cost effectiveness of the project. This pioneering approach will address all the energy needs of the property with a comprehensive package of measures, to achieve a significant emissions reduction. The work will transform the property - this is not only about making good, but also about making a fundamental change which will bring the house back into use.

Construction type	Solid Brick	Project type	Refurbishment
Property type	End Terrace	Sector	Public Residential
Location	Liverpool Merseyside	Project owner	Plus Dane Group
Retrofit for the future	ZA390M

PassivHaus Retrofit - Octavia Housing

PassivHaus retrofit of a three storey solid brick Victorian terraced house in a conservation area. Produce a comfortable and healthy house that requires no conventional heating system. Our focus will be on the key areas of insulation, airtightness and thermal bridging whilst we will also use innovative renewable and low energy technologies to generate heat and power on site. Heat loss and airtightness will be measured before and after the retrofit. We will install ongoing monitoring equipment in two identical properties, which will act as control houses (renovated to Decent Homes and Decent Homes plus only)

Construction type	Solid Brick	Project type	Refurbishment
Property type	Mid Terrace	Sector	Public Residential
Location	London London	Project owner	Octavia Housing
Retrofit for the future	ZA152J
	Passivhaus certified building

Peabody Retrofit of 4 Terrace Houses

Construction type	Masonry Cavity	Project type	Refurbishment
Property type	Mid Terrace	Sector	Public Residential
Location	London London	Project owner	Peabody
Retrofit for the future	ZA616J

Peterborough EnviroCluster Retrofit Project

The comprehensive upgrade of the fabic and services of a 1970s, masonry construction, two storey, three bedroom, semi-detached house to effect an 87% reduction in its overall energy consumption. Including: fully insulating the building and installing super-high performance windows and doors, making the fabric air and wind-tight; installing a sun-space and wind lobby, Installing solar thermal water heating; installing pv micro generation (incorporating battery storage and export to grid facilities); installing heat exchange technology into the fresh air input, together with pre-heated air from the sun-space and roof labyrinth.

Construction type	Masonry Cavity	Project type	Refurbishment
Property type	Semi-Detached	Sector	Public Residential
Location	Peterborough Cambridgeshire	Project owner	UK Centre for Economic and Environmental Development
Retrofit for the future	ZA313T

Post Second World War suburban mid terrace house - 80% carbon emission reduction through whole house upgrade approach utilising established and innovative prototype technologies.

Existing: brick/block cavity walls with cavity insulation and pebbledash; low pitch slate roof Proposed: Cavity walls overclad with insulation and render; Main roof insulation increased to 350mm; Insulation inserted between sloping ceiling rafters plus dry lining; Insulation inserted below living room & hall floors; Triple glazed uPVC windows (whole frame U=1.1); High efficiency gas boiler with flue gas heat recovery serving radiators; LED lights, 50k hours guaranteed max light output; Sun pipe to f/floor landing; Decentralised whole house ventilation; PV-T hybrid thermal panels; Shower water heat recovery; Reduced water consumption; Smoke alarm systems; AA++ appliances; smart metering with display

Construction type	Masonry Cavity	Project type	Refurbishment
Property type	Mid Terrace	Sector	Public Residential
Location	Dartford Kent	Project owner	PRP Architects Ltd
Retrofit for the future	ZA491L

Prestwich Carbon Coop Retrofit

A whole house retrofit carried out by Carbon Coop in 2014. Includes EWI, cavity wall insulation, some triple glazinng (double glazing retained where in good condition), passive / MEV hybrid vent, underfloor insulation and solar PV

Construction type	Solid Brick	Project type	Refurbishment
Property type	Semi-Detached	Sector	Private Residential
Location	Prestwich, Manchester Lancashire	Project owner	Carbon Coop

Refurbishment of Social Housing Stock

The installation of the new prefabricated roof is key to the innovation of this application. It allows for the retrofitted houses to have a high performing, insulated and airtight roof that enables thermal-bridge-free detailing from the roof eaves to externally insulated walls. It also allows the tenants to remain in occupation whilst the works are carried out to this pair of post-war semi-detached houses in Welshpool. The new roof also allows for new services (MVHR & Solar thermal & PV) to be installed in place to one of the houses, during off-site manufacture, enabling minimum disruption to residents and minimising on-site construction time. The services will be connected through the ceiling later in the process.

Construction type	Masonry Cavity	Project type	Refurbishment
Property type	Semi-Detached	Sector	Public Residential
Location	Welshpool Powys	Project owner	Ecostruct
Retrofit for the future	ZA515H

ReHab-Retrofitting behaviours, technologies and processes to tackle our domestic Carbon addiction

Our proposal is based around two distinct, but intrinsically linked, aims. The first aim is to address whole house solutions that deliver deep cuts in energy use and carbon emissions by focusing on the building fabric, structure and energy systems. The second aim is to gain an in depth understanding of occupant behaviour and psychology, identifying technologies and processes that facilitate low carbon lifestyles and decision making both by individuals and groups.

Construction type	Solid Brick	Project type	Refurbishment
Property type	Mid Terrace	Sector	Public Residential
Location	Bristol Bristol	Project owner	White Design Associates Ltd.
Retrofit for the future	ZA175H

Retrofit - Appledore, Ashford

The key project approach is to develop a solution that uses complementary technologies and techniques, and primarily tackles the whole envelope through well insulating the walls, floors and roof, remedying air gaps and installing MVHR, thus reducing the initial heating load to 23 W/m2. A solar gain heat pump coupled with skirting board heating can then be installed to meet the vastly reduced heating and hot water. Finally, a PV system to offset the dwelling's electrical consumption will be installed. This should be done ideally with the residents remaining in situ. Figures in this database have been based on the no.13 property, heated by electric panels heaters and a log fire.

Construction type	Masonry Cavity	Project type	Refurbishment
Property type	Semi-Detached	Sector	Public Residential
Location	Appledore, Ashford Kent	Project owner	Housing Services, Ashford Borough Council
Retrofit for the future	ZA646W

Retrofit for the future of sustainable social housing

The retrofit of a pair of semi-detached, 1950's "no-fines" concrete solid-walled houses. The aim is to deliver a low-tech, low-cost, zero-carbon retrofit of a traditionally hard-to-treat home, using existing technologies and traditional build techniques. The low-tech approach minimises the maintenance overhead for the landlord and in-use operation for the tenant. The design approach is to utilise the existing mass of the property, combined with super-insulation, passive solar design, energy-efficient hot water generation and mechanical ventilation, to deliver an ultra low-energy house. Remaining energy demands will be met not by on-site, building integrated renewables, but by purchasing of shares in a local community wind turbine.

Construction type	Other	Project type	Refurbishment
Property type	Semi-Detached	Sector	Public Residential
Location	Newark Nottinghamshire	Project owner	Hockerton Housing Project Trading Limited
Retrofit for the future	ZA366J