Retrofit Delivery
- Advanced
- 4 x 3 Hr Sessions
- FROM £320
- Taught Live Online
- 16 PHI POINTS
Learn from real world examples how to reduce risk, achieve airtightness and deliver a successful retrofit project on site.
Key Benefits
Gain the knowledge needed to deliver successful EnerPHit and other deep fabric retrofits on-site, exploring complexities and challenges encountered through real-world examples.
Learn how work effectively as a team to reduce risks and avoid costly unintended consequences.
Designed and taught by experienced trainers with hands-on retrofit expertise on multiple project types.
SPACES AVAILABLE
Retrofit Delivery - January 2026
19th Jan 2026 - 28th Jan 2026
View Schedule
FROM £320 ex. VAT
Online
What You'll Learn
This course prepares you to [have confidence in the retrofit design,] solve on-site problems and deliver high-quality results.
Using case studies that mirror real-world scenarios, problem-solving exercises, and expert guidance, you will deepen your understanding of the key elements of delivering deep fabric retrofits, including moisture management, airtightness and more, while tackling the unique challenges of retrofit projects.
Discover how to manage retrofit risks and costs, reduce unintended consequences and deliver quality retrofit using tried and tested techniques and applicable to EnerPHit, AECB Carbonlite, PAS2035/20 and other standards and guidance.
- Understand EnerPHit and other retrofit standards.
- Explore critical topics such as insulation, moisture, airtightness, thermal bridging, ventilation, and heat pumps.
- Gain practical knowledge and skills to minimize risks and ensure successful project delivery on-site.
- Develop confidence in your ability to plan, cost, and manage retrofits, even when unexpected challenges arise.
This course consists of four live, interactive online sessions led by trainers experienced in retrofit projects of all scales:
Session 1: Introduction to retrofit, whole building approaches, and introduction to moisture in buildings.
Session 2: Exploration of moisture risk, insulation, and problem areas in retrofits.
Session 3: Thermal bridging, airtightness and wind tightness, building services in retrofit.
Session 4: Building services continued, case study tutorial and retrofit in reality - explore what happens in real situations and the practical challenges when a project gets to site.
Who Is This Course For?
This course is ideal for a range of roles:
Retrofit Coordinators and Assessors: develop practical understanding to support your existing knowledge.
Designers & Consultants: Gain insights into assessing buildability, supporting contractors effectively, and understanding the practical implications of your designs.
Contractors & Installers: learn how to reduce risk, achieve airtightness and manage for high-quality outcomes.
Clients: learn how to approach projects to manage cost, reduce risk and ensure quality is delivered.
Self-builders: understand what's needed to manage your project successfully and avoid unintended consequences.
Course Details
| Duration | 4 × 3-hour sessions |
| Delivery Format | Blended — live online teaching + self-study |
| Price (Member) | £270 ex. VAT |
| Price (Standard) | £320 ex. VAT |
| Next Start Dates | Regular dates throughout the year |
| Location | Online |
| Certification & Credits | 16 PHI Credit Points & CPD Certificate worth 14 Hours |
| Access & Materials | Tutorials, hard-copy training manuals + appendix with further resources. |
| Funding Options | CITB grant support & regional funding available |
| Accessibility | Reasonable adjustments and additional learning support on request |
Trainers
Building better together
We believe better buildings start with better skills — that’s why every Coaction course is grounded in real project experience and focused on practical, actionable learning that builds confidence and competence.
Coaction exists to upskill the built environment — not for profit, but for impact. As a Community Interest Company, every penny goes back into improving training, supporting the workforce and accelerating the transition to low-energy, future-proof buildings.
Why choose Coaction?
- Future-focused skills: Every course is shaped by live project experience, aligned with industry best practice and continually updated — giving you the confidence to deliver high-performance buildings now and as standards evolve.
- Progression pathways for every role: From foundation learning to advanced specialist training, we offer clear routes for students, professionals, educators and full delivery teams. Support continues long after the course through our alumni community and industry partnerships.
- Fully supported learning experience: You’ll receive the materials and guidance you need to apply your learning — from manuals and sample packs to exam preparation (where relevant), PHI credit points and long-term access to high-quality resources. We'll work with you and your team as needed to make sure you get the right learning in place.
- Trusted expertise & recognised training: Delivered by leading UK building-performance specialists, our courses are accredited by the Passivhaus Trust, supported by preferred training partner status and recognised by the Passive House Institute.
Upcoming Courses
| Course Name | Dates | Location | Action |
|---|---|---|---|
Retrofit Delivery - January 2026 19th Jan 2026 - 28th Jan 2026 View Schedule | 19th Jan 2026 - 28th Jan 2026 View Schedule | Online | Book Now |
Retrofit Delivery - February 2026 23rd Feb 2026 - 4th Mar 2026 View Schedule | 23rd Feb 2026 - 4th Mar 2026 View Schedule | Online | Book Now |
Retrofit Delivery - Apr-May 2026 29th Apr 2026 - 20th May 2026 View Schedule | 29th Apr 2026 - 20th May 2026 View Schedule | Online | Book Now |
Retrofit Delivery - June 2026 1st Jun 2026 - 11th Jun 2026 View Schedule | 1st Jun 2026 - 11th Jun 2026 View Schedule | Online | Book Now |
What our learners think
Career Outcomes
This course will change your approach to retrofit forever. Past course participants say 'comprehensive knowledge from people that have completed and assessed retrofits personally'.
Where next? Continue learning.
Coaction courses ( PHI renewal points)
Passivhaus Practical (6 PHI) | Certified Passivhaus Designer | THERM (16 PHI)
Passivhaus Trust and member approved courses
Certified Training | On Demand | Partner/Member Events
Conferences / Communities / Events
Passivhaus Trust | iPHA | AECB
Publicise your projects and knowledge via the Passivhaus Trust, post on LinkedIn via your personal or work profiles and tag us.
Keep in touch - we are here to support you.
Frequently Asked Questions
Yes, all our session are recorded but we only offer access to these recordings upon request.
In our experience, the best outcomes happen when you attend all live sessions, however, in exceptional circumstances, with advance notice, we will be happy to provide a recording – please get in touch with your course manager.
Our terms and conditions state cancellations will be refunded at the following rates:
- More than 3 weeks before the course: full refund;
- Less than 3 weeks before the course: 50% refund;
- Less than 3 days before the course: no refund available.
If you wish to defer, you must give at least 7 days notice and can defer once free of charge, subsequent deferrals may incur a £50 admin fee. Participant substitutions for courses can be made at any time but the person taking the exam must have completed the whole course.
No - All exams are conducted online following the Passive House Institute strict guidelines.
Yes - we do offer this service. Please get in touch with us to discuss this further.
Yes, you must have your own individual copy of the PHPP software, required to register for the designer exam. PHPP10 software costs from £170 and can be purchased directly from the AECB.
We offer 10% discount on groups of 3 or more on our Certified Passivhaus Designer course.
You need to renew your qualification directly via the Passive House Institute. You can find out more here.
You can contact our team on 01752 686890 or email us at support@coaction.org.uk. We are here to help.
Where possible we will offer an alternative study plan to suit your availability, please get in touch to discuss this further.
