Retrofit Assessments

Comprehensive retrofit assessments for energy efficiency improvements

A retrofit assessment is a detailed property survey designed to identify opportunities for improving a building’s energy efficiency, comfort, safety, and long-term performance.

As part of the PAS 2035 framework, it provides the essential groundwork for any whole-house retrofit project, ensuring upgrades are appropriate, effective, and fully compliant with government standards.

E&F Retrofit Services Ltd brings over 20 years of experience in the energy and housing sector, offering thorough, accurate retrofit assessments for homeowners, landlords, housing associations, and contractors.

Based in Wrexham, we work throughout North and Mid Wales.

What is included in a retrofit assessment?

A PAS 2035 retrofit assessment consists of three key components: the occupancy assessment, condition survey, and energy performance evaluation. Together, these provide a complete picture of the property and how it is used.

1. Occupancy Assessment

This stage examines how the household uses the property day-to-day. We gather information such as:

• Heating patterns and lifestyle habits
• Energy use and consumption trends
• Ventilation behaviours (window use, extractor fans, etc.)
• Comfort concerns reported by the occupants

Understanding occupancy ensures recommended measures fit the real way the home is lived in.

2. Condition Survey

The condition survey identifies any defects or building issues that may affect retrofit measures. This includes:

• Damp, mould, or condensation risks
• Structural observations
• Roofing, walls, floors, and glazing condition
• Ventilation levels and potential air leakage
• Suitability of existing insulation and heating systems

Identifying risks early allows the Retrofit Coordinator to create a safe, effective plan of action.

3. Energy Performance Evaluation

Using industry-standard assessment methods, we measure the property’s thermal performance and energy efficiency. This includes:

• Fabric heat loss analysis
• Heating and hot water system performance
• Insulation levels and effectiveness
• Ventilation efficiency
• Opportunities for low-carbon technologies

These findings help shape accurate, reliable recommendations for improvement.

Supporting PAS 2035 compliance

Our retrofit assessments fully align with the PAS 2035 standard, ensuring all information required by a Retrofit Coordinator is collected correctly.

This supports the creation of a tailored, whole-house improvement plan designed to reduce energy consumption, improve comfort, and ensure long-term building health.

We work closely with installers, coordinators, and local authorities to enable smooth delivery of funded and non-funded retrofit projects.

How retrofit assessments help improve your home

A retrofit assessment is the foundation of any effective energy upgrade plan. It provides the evidence needed to:

• Reduce energy bills through targeted improvements
• Improve thermal comfort and indoor air quality
• Identify and prevent damp, mould, or ventilation issues
• Enhance property value and long-term resilience
• Maximise the benefits of government-backed funding schemes

The result is a safer, more efficient home that performs reliably for years to come.