What is PAS 2035?

21 August 2020 Kingspan Insulation UK

From 30th June next year, all retrofit work to install energy efficiency measures (EEMs) – whether they be insulation, solar PV or heat pumps – should be carried out under the new Retrofit Standards Framework. The framework has been designed to raise standards in both the design and installation of these measures, ensuring they are appropriate for the property and will perform as expected. 

Underpinning this new approach are two Publicly Available Specifications (PAS) which work together:
•    PAS 2030: 2019 – An update to the existing specification which covers how measures should be installed and commissioned; and
•    PAS 2035: 2019 – An over-arching document which lays-out how properties are assessed, how an improvement plan is developed, how EEMs are specified and how properties should be evaluated and monitored after work. It also creates a number of new roles within the retrofit process – setting out clear responsibilities for each.

Why has PAS 2035 been created?
The new specifications have been established based on recommendations from the Each Home Counts Report. Published at the end of 2016, this was created due to concerns about the quality of retrofit work in the UK. It aims to improve the planning and installation of these measures and ultimately ensure homeowners received good value for money. 

The report includes 27 recommendations which together form the new framework for the end-to-end delivery of retrofit EEMS supported with clear oversite and codes of conduct. Key aspects have already been introduced. These include the expansion of the existing TrustMark scheme to include Repair, Maintenance and Improvement (RMI), retrofits and energy efficiency sectors. Firms wishing to carry out work under any current or future government funding schemes, including ECO 3, will typically need to be a TrustMark Registered Business.

Registered Businesses can currently be certified under the 2017 version of PAS 2030. From next July, however, it will become compulsory for all Registered Businesses to achieve certification under the 2019 version of PAS 2030 and to be able to evidence that work complies with the processes within PAS 2035. 

How does PAS 2035 work?
PAS 2035 is based on the principal of a ‘whole-house approach’. This means that rather than installing measures ad-hoc, the property must first be carefully assessed and a clear 20-30 year improvement plan developed with a package of EEMs which are suitable to its particular characteristics. This plan should consider how EEMs will interact and set out an ordered schedule for their delivery.
The plan is stored, and updated, within the TrustMark Data Warehouse. This online portal allows all parties involved with the retrofit process to log their own work in a single location, supporting improved communication and collaboration. Owners can view relevant information contained in the warehouse – such as system guarantees – via a separate Property Hub which acts as a property passport. They should also be consulted throughout the retrofit process to build consumer confidence and understanding of the measures. 

What are the roles within PAS 2035?
A number of new positions are assigned under the Retrofit Standards Framework each with clear vocational or professional qualification requirements (contained within PAS 2030:2019 and PAS 2035:2019). Multiple roles can be carried out by the same individual providing they have the correct qualifications and any potential conflicts of interest are addressed.

The new roles are:
Retrofit Coordinator – Responsible for end-to-end oversight. The Coordinator commissions the other parties involved in the process and is responsible for protecting the owner and wider public interest and ensuring all work is completed in accordance with PAS 2035.
Retrofit Advisor – Liaises with homeowners to discuss the retrofit options which may be available for their property.
Retrofit Assessor – Carries out the Whole-Dwelling Assessment, considering a property’s suitability for improvement based on factors such as its age, condition and any planning constraints.
Retrofit Designer – Develops the package of EEMs to be delivered on the property.
Retrofit Installer – Carries out the installation and commissioning of EEMs. They are responsible for ensuring (and demonstrating) that this work is in compliance with PAS 2030:2019.
Retrofit Evaluator – Assesses the performance of the property and reports back any concerns to the project team.

What are the typical stages in a PAS 2035 retrofit?
1.     The owners meet with the Retrofit Advisor to discuss ways to improve their home’s energy efficiency, including both the introduction of new measures and how they can be adapted to their own behaviour.
2.    If they wish to proceed with improvements, the Retrofit Coordinator carries out a Risk Assessment using a variety of sources. These include energy performance certificates (EPCs), occupant interviews and in-person assessments of the property. Based on this, the property is given a risk grade from C (high risk) to A (low risk).
3.    The Whole-Dwelling Assessment is then carried out by the Retrofit Assessor. For properties with a risk grade of B or C, this must include an analysis of ventilation and air permeability.
4.    Using the findings in this assessment, the Retrofit Designer then develops the package of EEMs. An Improvement Option Evaluation must also be prepared for dwellings on Risk Paths B or C, outlining the pay-back period and carbon cost effectiveness of the measures. 
5.    The Retrofit Coordinator develops the package into a clear 20-30 year property improvement plan, communicating this to the client and obtaining their approval for the work. 
6.    The Coordinator then briefs the Retrofit Installer who undertakes the installation and commissioning.
7.    The Retrofit Coordinator then arranges handover including guidance on how to operate any new technologies. All paperwork is retained by the Coordinator with copies made available to the owner. They will also recommend a new EPC is commissioned and carry this out where agreed.
8.    Finally, all projects are subject to evaluation. The Retrofit Evaluator conducts a Basic Evaluation within 3 months of commissioning including an owner questionnaire. If any issues are highlighted, then Intermediate or Advanced Evaluations may be carried out. These involve a variety of monitoring processes, including thermographic surveys and fuel metering and are carried out within 6 months (Intermediate) and 24 months (Advanced) of handover. Based on these, the Evaluator then makes recommendations for any remedial actions and circulates these to the other parties via the Data Warehouse.

Learn more about best practice when specifying or fitting insulation
To help achieve best results when installing Kingspan insulation solutions, we have  created a number of helpful videos, covering everything from insulation basics to how best to install particular products.  

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