Part O Overheating Calculations - Overview
With rising summer temperatures and the tightening of energy efficiency standards, managing solar gain is no longer just about comfort—it’s a legal requirement. Part O of the Building Regulations ensures that new residential buildings are designed to limit unwanted solar gain and provide adequate means to remove excess heat.
Our expert consultancy provides comprehensive Overheating Risk Assessments to ensure your project meets these stringent standards without compromising on design or performance.
Why Part O matters
Introduced to address the “oven effect” in modern, highly insulated homes, Part O applies to all new residential dwellings, including houses, flats, and even student accommodation. Failing to comply can lead to:
- Costly Retrofits: Fixing overheating issues after construction is significantly more expensive than designing them out.
- Planning Delays: Compliance must be demonstrated to Building Control before completion.
- Occupant Discomfort: Excessive heat isn’t just uncomfortable; it’s a health risk
Our Two-Path Compliance Service
We offer both compliance routes defined by the regulation, tailored to the complexity of your project:
|
Route |
Best For… |
What We Do |
|
Simplified Method |
Low-risk projects with standard glazing ratios. |
We calculate the glazing-to-floor area ratios and check cross-ventilation against localized limit benchmarks. |
|
Dynamic Thermal Modelling |
High-density urban areas or complex designs. |
Using CIBSE TM59 methodology, we create a digital twin of your building to simulate real-world weather patterns and internal heat gains. |
Get a Quote Today
Don’t let your project overheat. Contact our specialist team for a free consultation and ensure your next build is safe, comfortable, and fully compliant.