Case Study: How a Retrofit Assessment Cut Energy Costs by 30%
The Challenge: Skyrocketing Energy Bills
Sarah and James, a couple living in a 1960s semi-detached home in the Midlands, were frustrated by rising energy costs. Despite being mindful of usage, their winter heating bills remained high.
Their home had poor insulation, single-glazed windows, and an outdated boiler—common issues in older UK homes.
Step 1: Retrofit Assessment Under PAS 2035
Instead of guessing which upgrades to tackle, the couple hired a certified retrofit assessor. The assessment included:
- A whole-house energy performance evaluation
- Airtightness and thermal imaging tests
- Review of occupancy patterns and ventilation needs
This resulted in a personalised, step-by-step improvement plan aligned with PAS 2035 standards.
Step 2: Phased Retrofit Upgrades
Following the assessment, they implemented four key upgrades:
1. Loft and Wall Insulation
High-performance insulation cut down heat loss and improved warmth retention.
2. A-Rated Double Glazing
Replacing single-glazed windows helped reduce heat transfer and external noise.
3. Condensing Boiler with Smart Controls
A modern boiler paired with smart thermostats boosted efficiency and comfort.
4. Ventilation Enhancements
New trickle vents and an extract fan maintained air quality in a now-tightly sealed home.
The Result: 30% Lower Energy Bills
Over the next 12 months, Sarah and James reported:
✅ 30% reduction in energy bills
✅ Greater comfort and fewer drafts
✅ Access to ECO4 grant support, covering up to 40% of upgrade costs
Key Takeaways for UK Homeowners
- Start smart: Always begin with a retrofit assessment
- Insulate first: Insulation offers the highest ROI
- Stay compliant: Work with PAS 2035 professionals to qualify for grants
- Go gradual: Phased retrofits are cost-effective and manageable
Retrofit assessments are transforming UK homes—making them warmer, greener, and more cost-efficient. Sarah and James are proof that smart planning can lead to long-term savings.
Ready to save on energy bills?
Book your retrofit assessment today and take the first step toward a smarter home.