In the spring of 2026, the UK retrofit landscape has reached a critical crossroads. As we push forward with the government’s ambitious Warm Homes Plan, a sobering reality has emerged: thousands of energy efficiency measures installed over the last decade are failing. From poorly executed External Wall Insulation (EWI) to inadequate ventilation strategies that lead to damp and mould, the industry is now facing a "remediation crisis."

At CPH Retrofit, we believe that the only way to safeguard the future of our housing stock is through uncompromising quality control and strict adherence to PAS 2035 compliance. Whether you are a social housing provider, a private landlord, or a homeowner, understanding why retrofits fail: and how to fix them: is essential for protecting your investment and ensuring resident comfort.

Are you worried about the performance of your recent energy upgrades? Look no further. With our 15 years of hands-on experience as former installers turned specialist consultants, we are here to guide you through the complexities of retrofit remediation services and the gold standard of PAS 2035.

The Reality of Retrofit Failure in 2026

Recent industry data from the newly established Warm Homes Agency (WHA) suggests that a significant percentage of retrofit projects: particularly those involving EWI: require some form of remediation within the first five to seven years. This is a staggering statistic, but for those of us who have spent over a decade on the tools, it is not entirely surprising.

The "volume-first" approach of previous funding cycles often incentivised speed over precision. This led to common issues such as:

• Thermal Bridging: Gaps in insulation around windows, doors, and eaves that allow heat to escape and moisture to condense.
• Poor Detailing: Incorrectly installed flashings and beads that lead to water ingress behind insulation panels.
• Ventilation Neglect: Increasing the airtightness of a building without upgrading the ventilation system, creating a "greenhouse effect" for mould growth.

These failures aren't just aesthetic; they are structural and health-related. This is why retrofit remediation services have become one of the most sought-after specialisms in the energy efficiency sector today.

Why PAS 2035 Compliance is Non-Negotiable

The introduction of the PAS 2035 framework was intended to end the era of "piecemeal" retrofitting. It moved the industry toward a "whole-house" approach, ensuring that every measure installed is compatible with the building and with other measures.

At CPH Retrofit, we view PAS 2035 compliance not as a bureaucratic hurdle, but as a protective shield for the property owner. It mandates several key roles and processes that act as checkpoints for quality:

1. The Whole-House Assessment: A thorough evaluation of the property’s current state, including its history, construction type, and any existing defects.
2. Professional Design: Every measure must be designed by a qualified professional who understands the physics of how heat and moisture move through a building.
3. The Retrofit Coordinator: This is the most vital role. The Coordinator oversees the entire process, from assessment to handover, ensuring that the design is followed and that the final result meets the required standards.

Without this structure, you are essentially leaving the performance of your building to chance. By choosing a partner who prioritises retrofit coordination, you are investing in a process that guarantees long-term success.

The CPH Difference: 15 Years of "Boots on the Ground" Experience

What sets CPH Retrofit apart in the 2026 market is our history. We didn't start in an office; we started on the scaffolding. Having spent 15 years as installers, we have seen first-hand the shortcuts that lead to failure. We know exactly where a contractor might try to save time by skipping a critical seal or using the wrong fixings.

This "ex-installer" perspective informs our entire approach to energy efficiency consulting. When we provide energy efficiency consulting services, we aren't just looking at a spreadsheet; we are looking at the technical reality of the building. We know how to spot the "red flags" that a standard assessor might miss.

Our background allows us to offer unparalleled expertise in retrofit remediation services. We don't just tell you that a system has failed; we tell you why it failed and exactly what technical steps are required to fix it under the current PAS 2030:2023 standards.

The High Stakes of the Warm Homes Plan

With the 2026 transition to the Warm Homes Plan, the government has tightened the screws on quality. The Warm Homes Agency is now performing more site audits than ever before. For landlords aiming to reach an EPC C rating by 2030, there is no room for error.

If a retrofit project is found to be non-compliant or failing, the financial and reputational risks are enormous. Remediation is almost always more expensive than doing the job right the first time. It involves stripping back failed materials, repairing underlying damage, and re-installing measures to the correct standard.

This is why we advocate for a "Quality First" strategy. By integrating services like air pressure testing early in the process, we can identify "invisible holes" in the building fabric before the final finishes are applied. This proactive approach is the hallmark of a professional, high-standard retrofit.

Five Key Pillars of Retrofit Quality Control

To ensure your projects stand the test of time, we recommend focusing on these five pillars:

1. Technical Monitoring: Don't wait until the end of the project to check the quality. Conduct mid-install inspections to catch errors early.
2. Ventilation Integration: Every insulation measure must be accompanied by a ventilation assessment. If you are making the house tighter, you must make it breathe.
3. Moisture Risk Management: Using the right materials for the right wall type is critical. Breathable (vapour-open) systems are often necessary for traditional builds to prevent rot.
4. Installer Accountability: Only work with contractors who are PAS 2030 certified and have a proven track record of high-quality installs.
5. Post-Project Evaluation: Conduct monitoring and evaluation (M&E) after 12 months to ensure the building is performing as predicted.

Remediation: Turning a Failed Project Around

If you are already dealing with a failed retrofit, do not panic. Retrofit remediation services are designed to recover these assets. At CPH Retrofit, our remediation process follows a clear path:

• Forensic Assessment: We use thermal imaging and borescope inspections to find the root cause of the failure.
• Compliance Review: We check the original design and installation records against PAS 2035 requirements to identify where the process broke down.
• Remedial Design: We create a bespoke plan to fix the issues, ensuring all new work is fully compliant.
• Oversight: We provide rigorous coordination to ensure the remedial works are completed to a "gold standard."

Our goal is to provide you with "peace of mind," knowing that your property is finally being treated with the care and expertise it deserves.

Conclusion: Partnering for a Sustainable Future

Retrofitting the UK’s housing stock is one of the greatest challenges of our generation. It is a complex, technical undertaking that requires more than just good intentions; it requires deep expertise and a commitment to quality.

At CPH Retrofit, we are dedicated to leading the industry toward a future where "remediation" is a word of the past. By championing PAS 2035 compliance and leveraging our 15 years of installer experience, we ensure that every project we touch is built to last.

Whether you are looking to start a new project or need help fixing an old one, our team is ready to assist. Explore our full range of services or contact us today to discuss how we can bring professional-grade quality control to your portfolio.

Let’s get it right the first time. Together, we can create warm, healthy, and energy-efficient homes that stand the test of time.