What we do
Assessment, coordination, design and building physics
Our services cover the professional roles that sit around a retrofit – not the installation itself. Each service has its own scope and deliverables, and each can be commissioned on its own or as part of a coordinated project.
01
Retrofit Assessment
A structured survey of how your home is built, heated, ventilated and used – the evidence base for any sensible retrofit plan.
02
Retrofit Coordination
Project-level oversight that links assessment, design, installation and handover, with risk managed at every stage.
03
Retrofit Design
Specifications and details that turn an improvement plan into work an installer can price and build correctly.
04
Air Tightness Testing
A measured pressure test that shows how much air leaks through the building fabric – before works, after works, or both.
05
Condensation Risk Analysis and fRsi Calculations
Thermal modelling of junctions and details to check whether internal surfaces are likely to stay warm enough to avoid condensation and mould.
View service about Condensation Risk Analysis and fRsi Calculations
06
Heat Loss Calculations (and Heat Demand)
Room-by-room design heat loss for sizing heating systems, and annual heat demand for understanding energy use – two different answers to two different questions.
At a glance
How the services differ
| Service | Answers the question | Typical output | Site visit? |
|---|---|---|---|
| Retrofit Assessment | What is this home like now, and what constrains it? | Assessment report and energy data | Yes |
| Retrofit Coordination | How do we plan and manage the whole project safely? | Option evaluation, improvement plan, risk records | Depends on project |
| Retrofit Design | Exactly what should be installed, and how? | Specification and key details | Sometimes |
| Air Tightness Testing | How much air leaks through the envelope? | Test report with measured result | Yes |
| Condensation Risk Analysis / fRsi | Will this junction’s internal surface stay warm enough? | Thermal model results and fRsi values | Usually not |
| Heat Loss Calculation | What size heating system, and how much energy per year? | Room-by-room kW and annual kWh | Sometimes |
Who does what
Roles kept distinct
A retrofit assessor records the property. A retrofit coordinator manages the project and its risks. A retrofit designer specifies the measures. Installers build them. Testing and calculations provide evidence at specific points. Keeping these roles clear avoids gaps in responsibility.
What we don’t do
Our boundaries
- We do not install insulation, windows, ventilation or heating systems.
- We do not act as principal contractor.
- We do not guarantee funding, planning or Building Regulations outcomes.
- We do not provide structural, asbestos or specialist damp surveys – we will tell you when one is advisable.
Next step
Not sure which service you need?
Describe the property and what you want to achieve. We will recommend a starting point.