Case Study: Whole-House Retrofit for 52 Homes in Newport

Target Green was appointed by Joyner Group, on behalf of Newport City Homes, to deliver PAS 2035-compliant retrofit services across 52 social housing properties in Newport, Wales.

The project was funded through the Optimised Retrofit Programme (ORP) and focused on improving the energy performance, comfort and long-term resilience of homes across 22 different archetypes.

How We Got Started

Target Green was brought in to provide full PAS 2035 services including Retrofit Assessment, Coordination, and Design. We also supported planning processes where required. From the outset, the project required a highly tailored approach, as the properties varied significantly in type, condition, and construction.

A key goal was to create a consistent level of performance across the estate while maintaining visual character and ensuring all works complied with PAS 2035:2019 and relevant Building Regulations (Approved Documents C, F, and L).

A photo of one of the 52 homes before the project began

The Challenges & Our Solutions

Severe Wind-Driven Rain Exposure

The site is located in a 'very severe' wind-driven rain zone, which required careful consideration in the detailing and product selection. We specified robust mineral fibre EWI systems with enhanced sealants, breathable finishes, and extended roof overhangs to protect the building envelope.

Resident Engagement

As with all retrofit projects, resident engagement was critical. With multiple properties and varying access needs, we worked closely with housing officers and residents to provide clear communication, reassurance around health and safety, and minimise disruption throughout the works.

A work in progress photo of the same property after the roof tiles had been replaced

Fabric First Improvements

• Cavity Wall Measures: Failed insulation was extracted and replaced where required; wall tie replacement was carried out as needed.

  
  

• External Wall Insulation (EWI): Installed to cavity walls using mineral fibre systems with U-values of 0.3 W/m²K. Render finishes were selected to align with existing façades.

  
  

• Roofing & Insulation: Roof tiles were replaced and existing loft insulation was topped up to improve thermal performance.

  
  

• Windows and Doors: High-performance replacements improved airtightness, thermal efficiency and safety.

  
  

• Thermal Bridging: Junctions around canopies and external elements were addressed with insulation measures.

  
  

Ventilation Strategy

• Positive Input Ventilation (PIV) systems were installed to improve air quality and reduce the risk of condensation.

  
  

• Background and Mechanical Extraction was upgraded in line with Approved Document F.

  
  

External & Associated Works

• Integration of wall fixtures, rainwater and soil vent systems into the new EWI layer.

  
  

• Installation of new overdoor canopies at entrances.

  
  

• Groundworks and drainage enhancements to mitigate surface water issues.

The Statistics

Final Outcome & Client Feedback

By adopting a fabric-first approach, the project laid the groundwork for sustainable, long-term energy performance improvements while enhancing resident comfort and building durability.

Newport City Homes praised the project's structured delivery, timely execution and measurable outcomes for tenants. 

These works now form the foundation for further decarbonisation measures in future funding phases.

The final outcome for the home following whole house retrofit, with external insulation, new roof, windows and doors among some of the many improvements made to the property

If you're exploring retrofit solutions and need expert guidance, get in touch with Target Green — we're here to help you plan, design, and deliver energy-efficient upgrades with confidence.