SAP Calculations
How to improve a SAP rating after design
Missed your target after the plans were drawn? You can still improve a SAP rating after design by changing the right inputs and testing them in the model. We explain
SAP Calculations
SAP calculations for garden rooms: what you need to know
Garden rooms with big glass doors and rooflights can fall outside the standard Part L glazing allowance. This guide explains when SAP calculations for garden rooms are needed, how glazing
Air Tightness
What causes hidden air leaks in your home or building
Cold rooms and high heating bills often point to small gaps you cannot see. We explain the usual places air escapes, why these gaps appear, and how air tightness testing
Air Tightness
Air tightness test result: what it means for your build
Your air tightness test result is a small set of numbers with a big say in whether a new build passes. We explain how the test works, how targets are
SAP Calculations
What happens if your SAP score is too low? Risks and fixes
A low SAP result can hold up building control sign-off, add cost and delay the sale of a new home. The good news is that most failed calculations can be
SAP Calculations
What is included in a SAP report? A plain guide
A SAP report holds much more than a pass or fail mark. We explain the documents, figures and checks inside it, how the design stage version differs from the as
SAP Calculations
Can you do SAP calculations yourself? What to know
Thinking about doing your own SAP calculations to save money? We explain why the final calculation must come from an accredited assessor using approved software. We also show the useful
Air Tightness
What Equipment Is Used in Air Testing?
Curious about Air Testing and its impact on buildings? From identifying leaks with blower doors to visual checks with smoke pens, air testing is key to energy efficiency and meeting
Air Tightness
How doors affect air tightness test results
Doors look solid, but they are one of the most common places for air to escape a building. We explain how doors affect air tightness test scores, what happens to