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Overheating in Buildings — Approved Document O and Design Strategies NewSupplier CPD

Sustainability 🏭 DCE CPD ⏱ 1 CPD Hour Free 📅 Added May 2026

About this CPD Resource

Free accredited CPD covering Approved Document O overheating requirements for new residential buildings, dynamic thermal modelling, passive cooling strategies and specification solutions.

Overheating in new residential buildings is a growing concern as climate change increases summer temperatures and building energy regulations drive higher levels of insulation and airtightness. Approved Document O, introduced in 2022, requires designers to demonstrate that new homes will not overheat. This DCE CPD covers the regulatory requirements and the design and specification strategies available to reduce overheating risk.

Learning Outcomes

  • Understand Approved Document O requirements for new dwellings
  • Apply the simplified and dynamic thermal assessment methods
  • Design passive cooling strategies to reduce overheating risk
  • Specify appropriate solar shading, ventilation and thermal mass solutions
Provider
DCE CPD
CPD Hours
1 hour
Access
Free
Category
Sustainability

Who Is This Suitable For?

Architects
Building services engineers
Energy assessors
Sustainability consultants
Housebuilders

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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 DCE CPD 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 DCE CPD 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 are the two compliance methods under Approved Document O?
The Simplified Method uses a prescriptive checklist approach based on glazing area, orientation, solar shading and ventilation openings. The Dynamic Thermal Modelling method uses detailed simulation to demonstrate compliance.
What design strategies reduce overheating risk?
Effective strategies include: limiting south and west-facing glazing; providing external solar shading; maximising thermal mass; designing for cross ventilation and night cooling.
Does Approved Document O apply to commercial buildings?
Approved Document O currently applies only to new residential buildings. Overheating in commercial buildings is addressed through CIBSE TM52.

About Overheating in Buildings — Approved Document O and Design Strategies

Overheating in new residential buildings is a growing concern as climate change increases summer temperatures and building energy regulations drive higher levels of insulation and airtightness. Approved Document O, introduced in 2022, requires designers to demonstrate that new homes will not overheat. This DCE CPD covers the regulatory requirements and the design and specification strategies available to reduce overheating risk.

This CPD resource is provided by DCE CPD (DCE CPD) and is suitable for Architects, Building services engineers, Energy assessors and other UK construction professionals.