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Knowledge Hub

Practical retrofit knowledge.
For everyone in the supply chain.

Guides, references and practical resources covering PAS2035, funding schemes, project management, resident engagement and retrofit technical considerations.

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Getting Started

New to retrofit? Start here. What retrofit is, why it matters and how the PAS2035 process works from beginning to end.

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Project Management

Managing the stages, roles and key decisions in a PAS2035 retrofit project — from procurement through to TrustMark lodgement.

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Technical Considerations

Housing stock types, construction constraints, ventilation, fabric first — the technical foundation of sound retrofit planning.

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Resident Engagement

Strategy, communication and consent — why resident engagement is the most important factor in retrofit programme success.

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Delivering at Scale

Consortia, procurement frameworks, supply chain management and quality assurance across large-scale retrofit programmes.

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Funding Schemes

WH:SHF, WH:LG, Boiler Upgrade Scheme — a practical guide to the main UK retrofit funding schemes and how to access them.

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All Guides

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knowledge library.

Getting Started
Getting Started in Retrofit: A Practical Introduction
What retrofit is, why it matters for the UK housing stock, and how the PAS2035 process works from initial assessment through to TrustMark lodgement.
6 min readRead guide →
Project Management
Managing a Retrofit Project: Stages, Roles and Key Decisions
How to manage each stage of a PAS2035 retrofit project effectively — from procurement and assessment through to installation oversight and TrustMark lodgement.
7 min readRead guide →
Technical
Retrofit Technical Considerations: Stock, Construction and Constraints
Housing stock types, construction constraints, ventilation strategy, fabric first principle and planning constraints — the technical foundations of sound retrofit planning.
6 min readRead guide →
Resident Engagement
Engaging Residents in Retrofit: Strategy, Communication and Consent
Why resident engagement is one of the most critical factors in retrofit success, and how to build a communication and consent strategy that actually works.
5 min readRead guide →
Scale Delivery
Delivering Retrofit at Scale: Consortia, Procurement and Supply Chain
Moving beyond pilots to large-scale delivery — consortium structures, procurement frameworks, supply chain capacity and quality management across complex programmes.
6 min readRead guide →
Funding
UK Retrofit Funding: A Practical Guide to the Main Schemes
Warm Homes: Social Housing Fund, Warm Homes: Local Grant, Boiler Upgrade Scheme — who can access each scheme, what it funds and what it requires.
7 min readRead guide →
Technical
The Fabric First Approach: Principles, Benefits and Application
The government-recognised strategy for retrofit — minimise energy demand through the building fabric before installing technology. What it means, why it matters and how to apply it.
5 min readRead guide →
Project Management
Costing Retrofit Projects: A Practical Guide
Capital vs admin costs, grant scheme cost caps, commonly underestimated costs and how to structure a robust retrofit project budget that survives contact with reality.
7 min readRead guide →
Project Management
Monitoring and Evaluation in PAS2035: What Is Required and Why It Matters
M&E is mandatory for all publicly funded retrofit. This guide explains the three levels — basic, intermediate and advanced — and why planning must start at Stage 1, not after installation.
6 min readRead guide →
Getting Started
The Hierarchy of Retrofit Compliance: PAS2035, PAS2030, MCS and TrustMark
How the interlocking standards and accreditation schemes that govern UK retrofit relate to each other — and what happens when any part of the compliance hierarchy is missing.
5 min readRead guide →
Funding
Minimum Energy Efficiency Standards: What Landlords Need to Know
MEES requirements, exemptions, how they apply to private and social landlords, and how retrofit addresses compliance — including what EPC ratings do and do not tell you.
5 min readRead guide →
Getting Started
Property Data in Retrofit: What You Need and Where to Find It
The types of property data needed for retrofit, where housing providers hold it, how to work with incomplete data, and why data quality determines programme quality.
5 min readRead guide →
Getting Started
What Is Retrofit Coordination? Roles, Responsibilities and Standards
A complete introduction to retrofit coordination, the roles defined under PAS2035, and what organisations need to know before commissioning coordination services.
5 min readRead guide →
Compliance
The Four Stages of PAS2035: A Complete Guide
PAS2035 divides the retrofit process into four defined stages. Understanding each stage and what is required at every point is essential for compliant delivery.
6 min readRead guide →
Compliance
TrustMark Lodgement: A Complete Guide for Coordinators
TrustMark lodgement is the final and most critical step in every PAS2035 project. This guide covers every requirement, common causes of rejection and how to avoid them.
6 min readRead guide →
Funding
Warm Homes Fund: A Complete Guide for Housing Providers
Everything housing associations and local authorities need to know about Warm Homes funding, eligibility criteria, scheme requirements and building a compliant programme.
6 min readRead guide →
Delivery
Resident Engagement in Retrofit: Practical Guidance
Effective resident engagement is one of the most important and most overlooked aspects of retrofit delivery. This guide covers what good engagement looks like and how to achieve it.
5 min readRead guide →
Technology
Retrofit Coordination Software: What to Look For
Retrofit coordination software can significantly improve compliance, document management and project oversight. This guide explains what features matter and what questions to ask.
5 min readRead guide →