A practical guide to fabric-first retrofit for homeowners planning extensions or renovations, focusing on insulation, airtightness, comfort and long-term energy savings.
What Is Fabric-First Retrofit?
Fabric-first retrofit focuses on improving the performance of the building envelope before adding renewable technology. For homeowners extending or renovating in 2026, this approach delivers better comfort, lower running costs and long-term value.
- Improves insulation and airtightness first
- Reduces heat loss and overheating risk
- Works seamlessly with extensions
| Core Fabric-First Upgrade Areas |
|---|
|
Wall, roof and floor insulation Airtightness detailing High-performance glazing Passive shading and ventilation |
A fabric-first strategy is most effective when planned alongside structural changes, such as extensions or full refurbishments.
Discover sustainable renovation options on our renovations and refurbishments page or explore integrated solutions via our design and build services.
Sustainable Retrofit FAQs
Common questions about eco-friendly upgrades and retrofit.
What does fabric-first mean?
It prioritises insulation and airtightness before adding heating or renewables.
Is retrofit only for old homes?
No. Many newer homes also benefit from targeted fabric upgrades.
Can retrofit be combined with an extension?
Yes. Extensions are ideal opportunities to upgrade the existing building fabric.
Will insulation reduce overheating?
Yes, when combined with ventilation and solar control.
Are sustainable upgrades expensive?
Upfront costs are higher but long-term savings are significant.
Do fabric upgrades improve resale value?
Yes. Energy-efficient homes are increasingly attractive to buyers.
