Publicly Available Specification for whole-building retrofit, establishing a framework for assessing, designing, and coordinating energy efficiency improvements in domestic buildings.
PAS 2035 is a Publicly Available Specification that provides a whole-building approach to retrofitting domestic buildings for improved energy efficiency. Unlike PAS 2030 which focuses on installation quality, PAS 2035 addresses the design and coordination of retrofit projects.
PAS 2035 ensures that retrofit measures are appropriate for each building and don't create unintended consequences like condensation or structural issues.
PAS 2035 introduces key roles in the retrofit process:
A central element is the risk assessment process:
| Risk Category | Assessment Focus |
|---|---|
| Path A | Lower risk - standard measures, straightforward buildings |
| Path B | Medium risk - requires more detailed assessment |
| Path C | Higher risk - complex buildings, multiple measures |
The whole-building approach prevents common retrofit problems:
PAS 2035 compliance is required for:
Our solar and renewable installation services integrate with PAS 2035 retrofit projects, ensuring coordinated delivery of energy improvements.
Publicly Available Specification for the installation of energy efficiency measures in existing buildings, required for government-funded retrofit schemes.
Energy Company Obligation 4 - a government scheme requiring large energy suppliers to fund energy efficiency improvements in fuel-poor and low-income households.
An Energy Performance Certificate rates a property's energy efficiency from A to G, required when selling or renting and for accessing certain renewable energy incentives.
Heat pumps extract warmth from air, ground, or water to heat buildings efficiently, eligible for government incentives when installed by MCS-certified installers.