Overheating Calculations

Overheating Calculations (TM52 & TM59) from GC Reports

Building Overheating is a critical risk in modern, highly insulated properties, and you need assurance that your designs will maintain comfortable conditions.

We use Dynamic Simulation Modelling (DSM)—the most detailed and accurate method—to analyze your building’s thermal performance. DSM packages take into account actual building geometry, construction materials, solar gain, occupancy patterns, and hourly weather data to model your building’s behavior under a wide range of conditions.

What We Deliver

Once a precise DSM model is produced, its primary use for overheating assurance is to provide the CIBSE TM52 and TM59 assessments. These calculations are essential for:

• Residential Overheating (TM59): Determining if new residential units, particularly high-density or high-rise apartments, are likely to suffer from excessive solar heat gain and inadequate night cooling.
• Non-Residential Overheating (TM52): Assessing thermal comfort in commercial buildings, ensuring that peak summer temperatures and frequency of overheating comply with industry best practice standards.

Why DSM is Essential for Overheating

The “performance” of your building is quantified by measuring peak summertime temperatures and the adequacy of your design’s passive solutions (such as thermal mass, solar shading, and natural ventilation).

While no model can guarantee future performance, our Overhating reports provide the evidence-based comparison you need to confidently choose the best design strategy and eliminate overheating risk early in the development process.