Statutory national targets for the reduction of greenhouse gas emissions in response to the threat of climate change imply that very significant improvements need to be made in the energy efficiency of the UK’s building stock, including nearly all its 27 million domestic buildings.
Whatever the scale of retrofit, a technically sound and usually cost-effective approach is the one known as “fabric first”, which should always be considered when a retrofit plan is formulated. This approach prioritizes improvements in five stages.
Credit: BSI PAS 2035:2019
For the UK to achieve its ambitious emission reduction targets the domestic model of energy efficiency retrofit that has previously existed must change to a more 'Whole House Retrofit' approach.
For the past years industry leaders have been assessing previous standards of compliance and energy assessment and the implementation of PAS 2035:2019 is a result of this review.
A new focus was required and it is widely acknowledged that this new working standard is a huge leap forward in helping the UK meet these most ambitious targets.
PAS 2035 is different - it splits out responsibilities that have often either been overlooked or have not previously been considered as a specialist requirement.
The result is the creation of the following key roles within the process:
THE RETROFIT ASSESSOR
Dwellings which require energy retrofit work will first need to be assessed by a Retrofit Assessor.
These assessors play an important role in the PAS 2035 process as they collect and provide property data/information which Retrofit Coordinators can use to develop a relevant improvement plan.
Reports produced by the Retrofit Assessor include:
THE RETROFIT COORDINATOR
In order to comply with PAS 2035 every domestic retrofit project will need to be managed by an approved Retrofit Coordinator.
A Retrofit Coordinator is the individual who will be responsible for overseeing the assessment of dwellings as well as the subsequent specification, monitoring, and evaluation of energy efficiency measures, in accordance with PAS 2035.
A Retrofit Coordinator will manage a retrofit project from inception to completion, and will need to liaise with Clients, Retrofit Assessors, Retrofit Designers and Retrofit Installers in order to ensure effective end-to-end project management and successful delivery of the project as a whole.
The activities that Retrofit Coordinators are expected to coordrinate as part of the PAS 2035 process include:
THE RETROFIT DESIGNER
The main responsibilities of the Retrofit Designer are:
Prior to undertaking the design and specification of retrofit work, the Retrofit Designer shall ensure that they are in possession of a retrofit assessment for the relevant dwelling or dwelling type, prepared by a Retrofit Assessor, on the basis of which the retrofit design shall be prepared.
THE RETROFIT EVALUATOR
The Retrofit Evaluator shall collate the information provided by the Client and the occupant(s), summarize it, formulate recommendations for any remedial actions required and any changes to the retrofit process that may be appropriate, and circulate the summary and recommendations to the Client, the Retrofit Coordinator, the Retrofit Assessor, the Retrofit Designer and the Retrofit Installer.
Three levels of monitoring and evaluation shall be carried out, as appropriate:
Sciana Systems Limited can also offer the following supplementary services to enhance each stage of PAS 2035:
Reference: PAS 2035:2019 Retrofitting dwellings for improved energy efficiency. Specification and guidance