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Knowledge Hub

Practical retrofit knowledge.
For the whole supply chain.

Guides on PAS2035, funding schemes, project management, resident engagement and retrofit technology — written for coordinators, housing associations and installers.

Getting Started

New to retrofit? What it is, why it matters and how PAS2035 works from assessment to TrustMark lodgement.

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PAS2035

The four stages, documentation requirements, compliance obligations and TrustMark lodgement in detail.

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Funding Schemes

WH:SHF, Warm Homes Local Grant and Boiler Upgrade Scheme — who can access them and what they require.

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Technology

What to look for in retrofit coordination software and how automation reduces the RC burden.

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Project Management

Resident engagement, non-conformity management and how to run a programme that hits its targets.

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TrustMark

Everything you need to know about lodgement — what's required, common failures and how to avoid them.

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Browse all guides

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PAS2035
How to Conduct a PAS2035-Compliant Retrofit Assessment
A practical guide to conducting thorough PAS2035-compliant retrofit assessments, covering pre-assessment planning, data collection, and documentation requirements for retrofit coordination projects.
5 min readRead →
Technology
Data Management Across a Large Retrofit Portfolio
Manage retrofit data effectively across your portfolio with standardized systems, compliance tracking, and integrated workflows to meet PAS2035 requirements.
5 min readRead →
Getting Started
How to Select a TrustMark-Registered Retrofit Assessor
Learn how to find and select a qualified TrustMark-registered retrofit assessor for your PAS2035 project, ensuring compliance and quality standards.
5 min readRead →
Industry
Carbon Reporting for Retrofit Programmes
Understand carbon reporting requirements for retrofit programmes under PAS2035, including measurement methodologies, scope definition, and compliance frameworks for UK retrofits.
5 min readRead →
Industry
The Procurement Act 2023: What Retrofit Suppliers Need to Know
The Procurement Act 2023 introduces significant changes to public procurement rules affecting retrofit suppliers. Understanding these new requirements is essential for bidding on government-funded retrofit projects.
5 min readRead →
Project Management
Managing Retrofit in Occupied Properties: Practical Guidance
Essential strategies for coordinating retrofit works in occupied homes, from pre-project planning through completion, ensuring minimal disruption and compliance with PAS2035 standards.
5 min readRead →
PAS2035
Post-Retrofit Monitoring: What PAS2035 Requires
PAS2035 mandates comprehensive post-retrofit monitoring to verify performance, ensure quality, and demonstrate compliance. Learn the essential monitoring requirements and practical implementation steps.
5 min readRead →
Technical
BISF Housing: Retrofit Challenges and Solutions
BISF housing presents unique retrofit challenges due to steel frame construction and non-traditional methods. This guide outlines practical solutions for achieving PAS2035 compliance.
5 min readRead →
Technical
Solar PV Assessment and Design Under PAS2035
A comprehensive guide to assessing and designing solar PV systems within PAS2035 retrofit standards, covering technical requirements, integration considerations and quality assurance.
5 min readRead →
Project Management
Quality Assurance in Retrofit: Beyond the Minimum Standard
Exceed PAS2035 minimum requirements by implementing robust quality assurance frameworks that protect project outcomes and ensure lasting retrofit performance.
5 min readRead →
Funding
Programme Reporting for WH:SHF Grant Recipients
Essential guidance for WH:SHF grant recipients on meeting programme reporting requirements, including timelines, data collection and submission processes.
5 min readRead →
Technology
How to Use RdSAP Data for Retrofit Modelling
Learn how to leverage RdSAP assessment data as a foundation for accurate retrofit modelling and energy performance predictions under PAS2035.
5 min readRead →
Technology
Building a Business Case for Retrofit Software Investment
Understand how to evaluate retrofit software investments and justify costs against operational savings and compliance benefits in your retrofit business.
5 min readRead →
Technical
District Heating and PAS2035: Coordination Requirements
Understand how district heating systems integrate with PAS2035 retrofits, including assessment requirements, technical coordination, and compliance pathways for retrofit programmes.
5 min readRead →
Project Management
Resident Consent and Access Management in Retrofit Programmes
Establish clear consent protocols and access schedules to ensure smooth retrofit delivery whilst respecting resident rights and minimising disruption.
5 min readRead →
Getting Started
PAS2030 Certification: What Installers Must Hold and Why
PAS2030 certification is mandatory for installers delivering retrofit work under PAS2035. Learn what qualifications you need, why they matter, and how to maintain compliance.
5 min readRead →
Getting Started
What Is Retrofit Coordination and Why Is It Required?
The RC role, what it involves at each PAS2035 stage, why it is mandatory for funded projects and what accreditation is required.
5 min readRead →
PAS2035
The Four Stages of PAS2035: A Detailed Guide
What happens at each stage — assessment, IOE/MTP, design, installation — and what documentation is required at every step.
6 min readRead →
PAS2035
TrustMark Lodgement: The Complete Guide
What lodgement requires, the full documentation set needed, the most common causes of failure and how to avoid them.
5 min readRead →
Technology
Retrofit Coordination Software: What to Look For
Assessment body integration, document automation, compliance auditing and portfolio management — what actually differentiates platforms.
5 min readRead →
Funding
Warm Homes: Social Housing Fund — A Guide for Housing Associations
How WH:SHF works, who can apply, cost caps, PAS2035 requirements and how to build a competitive application.
6 min readRead →
Project Management
Resident Engagement in Retrofit: Principles and Practice
Why engagement determines programme success, how to communicate effectively with residents and what post-installation follow-up should include.
5 min readRead →
Technical
Retrofit Technical Considerations: Stock, Construction and Constraints
How property type, construction method and existing conditions affect retrofit decisions — and what coordinators need to assess before design begins.
6 min readRead →
Project Management
Managing a Retrofit Project: Stages, Roles and Key Decisions
A practical walkthrough of the retrofit project lifecycle — from inception and assessment through design, installation and handover under PAS2035.
7 min readRead →
Funding
UK Retrofit Funding: A Practical Guide to the Main Schemes
An overview of the main publicly funded retrofit schemes — Warm Homes SHF, Warm Homes Local Grant, BUS and SHDF — including eligibility and key requirements.
7 min readRead →
Getting Started
Property Data in Retrofit: What You Need and Where to Find It
What property data is required at each PAS2035 stage, where to source it, and how data quality affects project outcomes.
5 min readRead →
Project Management
Monitoring and Evaluation in PAS2035: What Is Required and Why It Matters
What PAS2035 requires for monitoring and evaluation, how it differs from basic handover, and why good M&E data improves programme outcomes.
6 min readRead →
Funding
Minimum Energy Efficiency Standards: What Landlords Need to Know
The current and proposed MEES requirements for rented properties — what ratings are needed, by when, and how retrofit works towards compliance.
5 min readRead →
Getting Started
The Hierarchy of Retrofit Compliance: PAS2035, PAS2030, MCS and TrustMark
How the main standards and quality schemes fit together — and what each party in the retrofit supply chain is required to hold.
5 min readRead →
Getting Started
Getting Started in Retrofit: A Practical Introduction
A practical introduction to domestic retrofit for new entrants — what the sector involves, how it is regulated and what the main roles are.
6 min readRead →
Technical
The Fabric First Approach: Principles, Benefits and Application
Why insulation, airtightness and ventilation come before heating technology — and how the fabric first principle is applied under PAS2035.
5 min readRead →
Resident Engagement
Engaging Residents in Retrofit: Strategy, Communication and Consent
How to communicate with residents effectively through a retrofit programme — from initial contact to post-installation follow-up.
5 min readRead →
Scale Delivery
Delivering Retrofit at Scale: Consortia, Procurement and Supply Chain
How to structure large-scale retrofit delivery — procurement frameworks, supply chain management and programme governance.
6 min readRead →
Project Management
Costing Retrofit Projects: A Practical Guide for Contractors and Coordinators
How to build accurate cost estimates for retrofit projects — measures, professional fees, surveys and contingencies.
7 min readRead →