INCA Case Study: Nottingham DZ2

Project Background:

The Nottingham DZ2 project is a cornerstone of the council’s ambitious “Destination Zero” initiative, aimed at significantly reducing carbon emissions and enhancing the energy efficiency of residential properties. Located across Cosby Road, Beckford Road, and Hoten Road, this project encompassed 62 houses, including terraced and semi-detached homes. The primary goal was to upgrade the thermal performance of these solid-walled structures, originally with a U-value of 2.13 W/m²K, to meet future sustainability standards.

Energy Efficiency Measures:

The solution involved the installation of 200mm DDMW insulation with an Ultimate silicone finish and Brick ID, dramatically improving the buildings’ U-value to an impressive 0.18 W/m²K. This extensive insulation thickness was essential to accommodate future upgrades, such as Air Source Heat Pumps (ASHP) and solar panels, ensuring these homes remain at the forefront of energy efficiency advancements.

Unique Challenges and Solutions:

The project required meticulous planning and execution to overcome various challenges:

Insulation Logistics: Given the exceptional thickness of the insulation (200mm front and rear, 230mm on gable ends), we faced difficulties in scheduling and storing materials. By optimising delivery schedules and utilising additional storage space, we ensured a seamless workflow, despite the increased labour intensity.

Aesthetic Integration: Maintaining the aesthetic integrity of the neighbourhood was crucial. Full brick slips were meticulously matched to the existing detailing, with some properties featuring acrylic brick slips to preserve the original appearance. Solider courses were installed under windowsills, and silicone render was applied to other areas, harmonising modern efficiency with traditional aesthetics.

Impact on Residents:

The transformation has been profound for the residents of Nottingham DZ2. Enhanced insulation has significantly reduced energy consumption, leading to lower utility bills and more comfortable living conditions. One resident remarked, “Our home is noticeably warmer and quieter. The work has made a huge difference in our energy costs and overall comfort.”

Stand-Out Features:

The Nottingham DZ2 project is a beacon of sustainable design and community-focused development. The careful blend of advanced insulation technology and respect for the area’s architectural heritage sets a new standard for residential energy efficiency projects. The collaborative effort between Marsh and Gorchowski Architects, Surefire, and Nottingham City Council exemplifies what can be achieved through innovative design, strategic planning, and a commitment to sustainability.

Conclusion:

The Nottingham DZ2 project not only meets but exceeds current energy efficiency standards, positioning the community for a greener, more sustainable future. This holistic approach, focusing on both the technical and human aspects, underscores its worthiness for recognition. The success of this project demonstrates the transformative power of thoughtful, well-executed energy efficiency measures, benefiting both the environment and the residents who call these houses home.