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CPD Resource

Retrofit and Low Carbon Refurbishment

Sustainability 🏛️ RIBA ⏱ 2 CPD Hours Member

About this CPD Resource

Practical approaches to retrofitting existing building stock, including fabric-first design, heat loss modelling, ventilation strategy and avoiding moisture risks.

The UK has the oldest and least energy-efficient housing stock in Europe, and achieving net zero will require deep retrofit of millions of existing homes. Retrofit is technically more complex than new build, demanding thorough understanding of existing building fabric, moisture dynamics, ventilation requirements and the interactions between different measures.

Learning Outcomes

  • Apply fabric-first retrofit design principles
  • Model heat loss and assess retrofit measures
  • Design appropriate ventilation strategies for retrofitted buildings
  • Avoid interstitial condensation and moisture risks
Provider
RIBA
CPD Hours
2 hours
Access
Member
Category
Sustainability

Who Is This Suitable For?

Architects
Building services engineers
Energy assessors
Contractors
Housing managers

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Why This CPD Matters

The UK construction industry is responsible for approximately 40% of the country's total carbon emissions — roughly equally split between the operational energy use of buildings and the embodied carbon of construction materials and processes. Meeting the UK's legally binding commitment to reach net zero by 2050 requires a transformation in how buildings are designed, built and operated, and construction professionals are at the centre of that transformation.

Sustainability CPD is no longer a niche interest — it has become a core professional competency requirement. RIBA introduced mandatory sustainable architecture CPD in 2021, requiring all Chartered Members to engage with sustainability topics every year. ICE has made sustainable development (including decarbonisation and nature-positive design) a mandatory CPD theme. The Growing demand from clients, planning authorities and funders for BREEAM ratings, net zero carbon compliance and embodied carbon reporting means that construction professionals who lack sustainability knowledge are increasingly at a professional disadvantage. This CPD from Royal Institute of British Architects directly addresses this skills gap.

Key Topics and Industry Context

Sustainability in construction encompasses a broad and rapidly evolving range of topics. Energy efficiency in buildings — covering both operational energy (heating, cooling, lighting, hot water) and embodied carbon (the carbon emitted in producing, transporting and installing building materials) — is central to the industry's decarbonisation challenge. BREEAM, the world's leading sustainability assessment method for buildings, provides a framework for measuring and improving building sustainability across nine categories. The Passive House standard offers a rigorous energy performance framework for ultra-low energy buildings. Sustainable materials specification, including the use of Environmental Product Declarations (EPDs) to compare embodied carbon, is becoming standard practice on ambitious projects.

This resource from Royal Institute of British Architects contributes to the sustainability knowledge that construction professionals need to advise clients, design compliant buildings and meet the growing expectations of planning authorities and institutional clients for measurable sustainability performance.

How This Fits Your CPD Requirements

RIBA's mandatory core curriculum includes sustainable architecture as one of the topics that all Chartered Members must engage with each year as part of their 35-hour CPD requirement. ICE has designated Sustainable Development (including decarbonisation and nature-positive design) as one of three mandatory CPD themes that all professionally qualified members must cover over a three-year cycle. RICS recognises sustainability as a core competency for several its assessment pathways and its members are increasingly required to provide sustainability-related advice. CIOB includes sustainability in its CPD framework. Across all major construction professional bodies, sustainability is now a required area of competency development.

What is the fabric-first approach?
Fabric-first means prioritising improvements to the building envelope — insulation, air tightness, window performance — before installing low-carbon heating systems.
What is interstitial condensation?
Interstitial condensation occurs when warm moist air migrates through a building element and condenses within the fabric. If not managed correctly, it can cause structural damage and mould growth.
What ventilation is needed in an airtight retrofitted building?
Airtight buildings require mechanical ventilation to maintain indoor air quality. MVHR (Mechanical Ventilation with Heat Recovery) is the most energy-efficient option.

About Retrofit and Low Carbon Refurbishment

The UK has the oldest and least energy-efficient housing stock in Europe, and achieving net zero will require deep retrofit of millions of existing homes. Retrofit is technically more complex than new build, demanding thorough understanding of existing building fabric, moisture dynamics, ventilation requirements and the interactions between different measures.

This resource is provided by RIBA (Royal Institute of British Architects) and is suitable for Architects, Building services engineers, Energy assessors and other construction professionals. It contributes 2 CPD hours towards professional body requirements including CIOB, ICE, RIBA and RICS.