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What are Psi values? A Rough Guide
What are Psi-Values? Psi-values (also known as Ψ-values or psi coefficients) refer to the linear thermal transmittance of a building...


Photographic Evidence in Part L
The introduction of photographic evidence in Part L of the Building Regulations aimed to provide clearer information on the as-built...


PART G WATER CALCULATIONS
Over the past few years, Part G Building Regulations have changed for all new homes, extensions and conversions and property owners are...


Do I need a SAP Calculation for my extension?
SAP calculations are used to calculate and assess the energy efficiency of houses. They are part of the government’s plan to reduce...


How is the EPC band calculated?
One of the initial steps when deciding to buy or sell a home, is examining its Energy Performance Certificate (EPC). Finding out your...


As-Built SAP Calculations
An As-Built SAP Calculation is the final stage of the building compliance process and is undertaken once building work has been...


Design Stage SAP Calculations
Building Regulations dictate that a Design Stage SAP Calculation and Predicted EPC must be submitted to Building Control for new...


Energy Performance Certificates (EPCs)
All new build commercial and residential properties require a valid Energy Performance Certificate (EPC). The EPC is produced as a result...


Why do I need a SAP Calculation?
Building Regulations/standards require that a SAP Calculation is carried out before commencing work on a new build dwelling i.e. houses,...


A guide to Part L of the Building Regulations
Approved document L1 of the Building Regulations places requirements for energy conservation upon domestic buildings. This is split into...


SAP 10 Analysis of Changes
On 24th July 2018 the Department for Business Energy & Industrial Strategy (BEIS) in conjunction with the technical authors the Building...


SAP or RdSAP EPC
With the construction of housing on the increase in the UK, DEAs may wish to consider undertaking the On Construction qualification...
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