Skill Profile
Building Physics
"Applying the physical principles governing heat, moisture, light, air, and sound in buildings — using that understanding to make design decisions that produce comfortable, healthy, and energy-efficient spaces."
YOUR SKILLS
Skill Breakdown
Buildings are not just aesthetics and structure — they are physical systems governed by the same laws of physics that describe the natural world. Building Physics is the discipline that connects those laws to real design decisions. How quickly does a wall transmit heat? Where will condensation form? How much daylight reaches the back of the room? How much sound passes through the floor from the flat above? These questions all have quantitative answers rooted in physics, and they directly determine whether a building meets regulations, keeps its occupants comfortable, and avoids expensive failures like mould, overheating, or acoustic complaints after construction.
Problems This Skill Solves
- A new housing development where every flat receives overheating complaints in summer despite passing design-stage calculations
- A school with high CO₂ levels because ventilation was undersized using theoretical rather than real occupancy figures
- An office where condensation destroys partitions because the vapour barrier was placed on the wrong side of the wall
- A concert hall where the acoustic design failed because the structural engineer changed the floor specification without telling the acoustic consultant
"Building physics compliance is mainly a calculation exercise — once the U-values meet the standard, the fabric performance is confirmed."
Calculated U-values assume perfect installation and negligible thermal bridging. In practice, linear thermal bridges at junctions and point bridges at fixings can increase heat loss by 20–40% above the elemental calculation. Compliance calculations routinely underestimate real-world fabric performance because they do not account for workmanship variation or as-built geometry.
"Modern buildings automatically perform well"
The construction industry has a significant performance gap — buildings routinely fail to meet their design-stage energy and acoustic predictions in use. Building Physics expertise is needed more than ever to close this gap.
Research & Outlook
The Net Zero Carbon agenda is the defining driver of building physics research, demanding buildings that perform as designed at every stage of their life. Post-Occupancy Evaluation (POE) is revealing systematic gaps between predicted and actual performance, driving demand for more rigorous building physics at design stage. Digital twins — live virtual models of real buildings — are creating a new frontier for dynamic building physics analysis.
Future Trajectory
How Building Physics Has Evolved
Energy crises drive the first building energy regulations — physics enters the building code
Dynamic thermal simulation software replaces steady-state calculation methods
Building Information Modelling (BIM) integrates building physics into the central design model
Net Zero targets elevate building performance to a legal and contractual requirement
AI optimises whole-building performance across all physical disciplines simultaneously during concept design
Ways to Learn
Building Physics — Hens (textbook)
TextbookCIBSE Guides — The Building Services Bible
Professional ReferenceBuilding Physics Fundamentals — IOA / CIBSE Short Course
Professional CourseOpenStudio / EnergyPlus — Free Building Simulation
Free Software TutorialSee This Skill In Action
Watch a professional demonstrate Building Physics in a real working environment — what it looks like, how it's applied, and why it matters.
Engineering / Architecture
Building Physics
Also Known As
Growth Path
Can explain U-values, thermal bridging, sound transmission, and daylighting factors in plain language. Understands that building performance is the result of multiple interacting physical systems.
Can model building thermal and acoustic performance using specialist software, interpret simulation outputs, and identify design changes needed to meet regulatory targets.
Integrates all physical performance disciplines into whole-building design guidance. Navigates conflicts between competing performance criteria and advises design teams under programme pressure.
How to Practise
- 1.Notice the temperature differences in your own home — which rooms overheat, which are cold, and why? Start linking observations to building physics principles
- 2.Look up the U-values of common building materials — understand why a timber frame wall has very different thermal performance to a brick wall
- 3.Read a real planning acoustic report for a residential development (publicly available via planning portals) and trace how each calculation connects to the building design
- 4.Use free online tools to calculate sound insulation performance of a specific wall construction
How to Prove
- ·Complete a Building Physics module as part of an architecture or engineering degree, or through a CPD short course
- ·Produce a multi-discipline building performance analysis report integrating thermal, acoustic, and daylighting calculations
- ·Demonstrate understanding by explaining how a change to one system (e.g., thicker insulation) affects others (e.g., cold bridging and condensation risk)