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Behind The Walls
Behind The Walls
Author: Peter Finn and Fergal Cantwell
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© 2026 Peter Finn and Fergal Cantwell
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Expert guests from the Construction Industry explaining how to Retrofit your home in an easy to understand way.
13 Episodes
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DescriptionFollowing on from their viral episode on the new SEAI grant uplifts, Pete and Retrofit Ferg go deep on the grant that got the biggest boost — the heat pump grant, now worth up to €12,500. To do it justice, they brought in the right person: April McHale of Mitsubishi Electric, with over 25 years of experience in the heating industry.This episode is a masterclass in everything heat pumps. April and the lads cover how heat pumps actually work, why fabric-first is the right approach (for any heating system), and what the installation process really looks like from start to finish. They bust the most common myths — noise, running costs, power cuts — and give homeowners a clear, step-by-step roadmap for applying for the grant, getting a technical assessment, and getting the work done correctly.There's also a real-life cautionary tale about €18,000 worth of grants lost due to bad advice, a discussion of the new high-temperature heat pump pilot using R290 refrigerant, and an honest, first-hand account of a heat pump installed in a stone cottage from the 1800s that proves the technology works in even the most unlikely homes. If you're thinking about a heat pump — or know someone whose boiler is on its last legs — this is required listening.Timecodes00:00 – Welcome & Introduction Pete and Ferg introduce the episode as a follow-up to their viral SEAI grants episode. This one goes deep on heat pumps, with special guest April McHale of Mitsubishi Electric.01:10 – Meet April McHale April's background — 25+ years in the heating industry, starting with underfloor heating in 1999, moving through geothermal and air-to-water heat pumps, solar, and retrofit. Now with Mitsubishi Electric.03:04 – New Builds vs Retrofit: Why Heat Pumps Work So Well New builds are built to airtight standards and are a natural fit for heat pumps. The challenge — and the big opportunity — is retrofitting heat pumps into existing homes.04:49 – Fabric First: Why Your Home Needs to Be Ready You can install a heat pump in any home, but the better insulated it is, the lower the running temperature and the greater the efficiency. Attic insulation, wall insulation, good windows — these all matter regardless of what heating system you're using.06:13 – The Triple Win of Heat Pumps One unit of electricity generates 3–4 units of heat. Zero combustion, no fumes, better air quality. Lower running costs, dramatically better comfort levels, and better for the environment. Pete's "triple win" explained.07:35 – Addressing the Negativity Around Heat Pumps Why do heat pumps get such a bad press? April explains the reason: they're always pushed to run at low temperatures for efficiency, and when they're not designed or installed properly, problems follow. The solution: use SEAI-registered contractors.07:52 – The New Heat Pump Grant: €12,500 Explained Breakdown of the new grant: €6,500 base + €4,000 renewable heat bonus + €2,000 for central heating upgrades (radiators or underfloor heating). Now covers 60–65% of overall costs in most cases.09:17 – Heat Pump vs Oil Boiler: The Real Comparison Yes, a boiler swap costs less upfront. But you're locking in fossil fuels for another 15–20 years. Carbon taxes are going one way. The grants are there now — this is the time to make the switch.11:59 – What a Heat Pump Installation Actually Involves Outdoor unit, new cylinder, updated radiators if needed. A typical retrofit swap-out takes about two days. April walks through exactly what to expect and what gets disrupted.13:27 – Comfort Levels: The Thing No One Talks About Enough Lower flow temperatures, consistent background heat, no blast-and-freeze cycle. The difference in comfort when moving from oil/gas to a heat pump is something homeowners consistently rave about.16:36 – Air Quality & Health Benefits No combustion, no flue, no fumes. A heat pump means cleaner air inside your home. A benefit that's often overlooked.17:35 – Changing Your Habits with a Heat Pump Leaving oil and gas behind means leaving behind the Irish habit of rationing heat. With a heat pump, you set your temperature and leave it — consistent, low, ambient heat all the time. Don't turn it off when you go out.20:07 – Just Leave It Alone The single most important piece of advice for heat pump owners. Set it, leave it. No need to interfere. The system manages itself.22:19 – Servicing & Maintenance Heat pumps should be serviced every year — it's a condition of warranty in most cases. Not expensive, not complicated. Don't wait for something to go wrong.23:57 – Heat Pump Reliability April and Ferg's experience: no callbacks, no breakdowns. When sized and installed correctly, heat pumps just quietly and consistently do their job.25:05 – How to Apply for the Grant: Step by Step Go online to the SEAI portal, enter your MPRN, get instant approval. Then get your energy assessment, choose a registered installer, get the work done, submit paperwork, receive payment. Eight months to complete the work under the individual grant.26:13 – Technical Assessment & Heat Loss Indicator (HLI) Explained What is the heat loss indicator? Why does it matter for heat pump grants? How does a BER rating differ from a HLI? And why solar PV can give you a great BER but still leave you with a poor HLI.29:07 – Getting a Home Energy Assessment: The Smart Starting Point Why getting a full home energy assessment (including technical assessment) through a One-Stop Shop gives you all the information you need in one go — the BER advisory report, roadmap, and technical assessment — for a combined grant of €350.33:08 – Common Urban Myths: Noise Does a heat pump make a constant loud noise? Not if it's installed correctly. The outdoor fan is quiet, the thermal insulation in a properly upgraded home has acoustic benefits, and placement matters. Ferg's gas boiler used to wake him up at 6am. His heat pump doesn't.36:05 – The Danger of Bad Advice: A €18,000 Cautionary Tale A homeowner got new windows and a heat pump installed before applying for grants — on a builder's advice. Result: €18,000 in grants lost. There are no retrospective SEAI grants. Always get approval first.39:33 – How to Qualify Your Information Source Don't rely on Facebook, social media "experts," or even mainstream media commentators. Go to the SEAI website. Speak to registered contractors. Get it in writing. And make sure you get approval before a single bit of work is done.41:41 – Grant Timeline & Flexibility Eight months to complete work under individual grants; 12 months for One-Stop Shop. Once you're in the system and communicating with SEAI, they will work with you. The key is getting approval first.42:03 – The Installation Process in Detail Heat loss calculations room by room, radiator sizing, cylinder sizing, pipework assessment, controls and zoning. It's all done by the installer — the homeowner doesn't need to worry about any of it.44:16 – Radiators: Steel vs Aluminium, and Practical Upgrades Steel radiators are cheaper, more widely available, and perfectly suitable for heat pump systems. Going from single to double panel is often all that's needed to get the right output — no need for complete replacements.
In this episode of Behind the Walls, Roy, Ferg (aka The Retrofit Guy), and special guest Stephen from the SEAI break down the latest Irish home energy grant changes and what they actually mean for homeowners.With recent grant increases and new measures announced, the lads cut through the noise and misinformation to explain:What grants have increasedWho is eligible (and who isn’t)The truth about windows & doors grantsHow to upgrade your home step by step, without wasting moneyWhy insulation still comes before shiny upgradesHow to create a long-term retrofit pathway that leads to heat pumps and lower billsThis is a must-listen for homeowners, first-time buyers, and anyone thinking about energy upgrades in 2025 and beyond.Timecodes00:00 – Welcome & introduction 00:45 – Grant increases announced: what’s changed and why it matters 02:10 – Heat pump grants explained (€12.5k breakdown) 03:45 – One Stop Shop vs individual grants 04:28 – New high-temperature heat pump pilot (boiler-style heat pumps) 06:45 – Who high-temp heat pumps are best suited for 07:38 – Attic & cavity wall insulation grant increases 09:10 – How to apply for individual grants (step-by-step) 10:12 – Why insulation is still the best first upgrade 12:00 – Comfort vs cost: why insulation changes everything 14:50 – Registered contractors vs “cheap jobs” explained 18:25 – Windows & doors grants: what everyone is asking 19:03 – Windows & doors now available as standalone grants 20:16 – Eligibility rules: attic & walls must be “good” or “very good” 21:13 – BER advisory reports explained simply 22:00 – Why windows aren’t a free-for-all 24:17 – Why a home energy assessment is essential 26:04 – Creating a realistic retrofit pathway over time 27:27 – First-time buyer enhanced insulation grants 28:23 – Why One Stop Shops still matter 29:16 – Airtightness, ventilation & hidden upgrades 30:06 – Project management realities homeowners underestimate 32:24 – Breaking down the windows & doors pathway clearly 34:08 – External wall insulation vs internal dry lining 36:35 – Easy wins: attic + cavity wall first 38:12 – Heat pumps myths vs reality 39:36 – Why solar PV should be the “cherry on top” 41:34 – Can you get a second wall insulation grant? 43:03 – Extra supports for energy-poor households 44:00 – Final thoughts: spending money in the right order
In this Behind the Walls season finale, Pete and Fergal are joined by special guest Mike Finnerty to wrap up an incredible year of homeowner education, retrofit insights, and myth-busting. Together, they break down what homeowners still need to know, why government clarity matters more than ever, and how Season 2 will raise the bar even higher.The trio dive into the big questions facing the retrofit journey: • Will grants change next year? • Are government ministers truly committed? • What information do homeowners need now to make confident decisions?00:00 – 00:31:04 Opening & Why the Podcast Exists Pete and Fergal reflect on their mission to break down retrofit knowledge for everyday homeowners — joined today by guest Mike Finnerty.31:04 – 32:24 Keeping It Simple: Breaking Down Technical Jargon How the team translates expert insights into clearer, “caveman-style” explanations.32:24 – 33:48 Why a Government Minister Needs to Join Season Two Mike asks the big questions: Why is ministerial clarity essential, and what should they be pressed on?33:48 – 36:18 The One Question Homeowners Need Answered Are the government genuinely committed to the retrofit journey — and will they fund it long-term?36:18 – 37:43 Climate Reality & Ireland’s Environmental Challenges The team looks beyond grants to water quality, climate shifts, and long-term sustainability.37:43 – 38:22 Season Break Banter Will the lads miss each other? A Starsky & Hutch moment (and Christmas jokes).38:22 – 39:16 Upcoming One-Stop-Shop Live Event Mike and Fergal announce the next event: Silver Springs Clayton Hotel, Cork — December 4th.39:16 – 40:03 Homeowners Are Asking Smarter Questions Why the public is more informed than ever — and why the “sticky” questions are the best ones.40:03 – 41:11 Feedback & Season Two Improvements Pete, Fergal, and Mike chat about balance, structure, and what they’ll tweak in the next season.41:11 – 42:03 Architects, Criticism at Home & Dream Guests A funny exchange about architects, Mike’s wife, and why Dermot Bannon is a must-have guest.42:03 – 43:16 The Origin Story How the idea for the podcast was born in a Galway bar — and why none of them expected it to take off like this.43:16 – 43:50 Final Thoughts & Looking to 2025 Thanking listeners, encouraging questions, and promising an even stronger season ahead.43:50 – End Closing Moments Laughs, bloopers, and the official sign-off.
In this episode, we sit down with Eoin McGann from EMG Energy Consultants to break down everything you need to know about home energy assessments. Whether you're considering a retrofit, thinking about installing a heat pump, or just want to understand where your home stands energy-wise, this is the episode for you.Eoin walks us through the entire process from start to finish, explaining what assessors actually look at when they visit your home, how the roadmap system works, and why getting your assessment done is the essential first step on your retrofit journey. We also discuss the Heat Loss Indicator (HLI), why it matters for heat pump eligibility, and how the industry has evolved over the years.Pete shares his own experience having Eoin assess his 20-year-old home, and we explore why every homeowner in Ireland should seriously consider getting their home energy assessment done while the grants are still available.
Welcome to Episode 8 of Behind The Walls with Pete and Ferg!In this episode, we're joined by the one and only Eric Donovan - former European boxing champion, psychotherapist, counselor, father, husband, and homeowner currently completing his retrofit journey.Eric shares his incredible experience transforming an old, energy-inefficient house (F/G BER rating) into a modern, comfortable forever home for his family. From navigating the vacant homes grant to achieving a A+ BER rating, Eric gives an honest account of the entire process.Timestamps:00:00 - Introduction & Welcome Eric Donovan01:12 - Eric's journey to homeownership at 4002:08 - The decision to retrofit vs. buy and move in immediately03:52 - Meeting on Hell Week & the bromance begins05:42 - The Vacant Homes Grant game changer07:42 - Combining grants for maximum benefit09:06 - Getting contractors and starting the work10:14 - External vs. internal wall insulation decision11:24 - The one-stop shop approach with Via Vibed13:14 - Air-to-water heat pumps explained16:14 - Adding solar panels to the system17:10 - The investment and long-term benefits19:13 - How stressful was the process?20:09 - Eric's message about retrofitting22:01 - League of Ireland passion (Drogheda United!)24:00 - Life after boxing & mental health work26:01 - The importance of asking for help28:36 - Looking forward to Christmas in the new home31:09 - Final advice for anyone considering retrofit34:44 - Shout outs & where to find Eric36:40 - The Hell Week story & wrap upWhat we cover:✅ Combining the Vacant Homes Grant with SEAI grants for maximum benefit✅ Why external wall insulation was the right choice for Eric's home✅ The game-changing benefits of air-to-water heat pumps✅ Solar panels and creating a fully energy-efficient home✅ Working with Via Vibed and project management throughout the retrofit✅ The reality of moving from cramped living to a spacious family home✅ Eric's advice for anyone considering a retrofitKey Takeaways:External wall insulation provides better coverage and gives your home a complete faceliftAir-to-water heat pumps deliver consistent temperature and 24/7 hot waterIt's never too early to ask questions about retrofitting your homeThe right time to retrofit is when it suits your lifestyle - don't wait for the "perfect moment"Eric also discusses his work as a psychotherapist at First Ones Therapy and Wellness in Naas, his new role as head coach at Athy Boxing Club, and his passion for League of Ireland football (come on the Drogs!).Thanks to Eric for being so open about his retrofit experience - moving into your forever home just before your 11th anniversary with Laura!Don't forget to LIKE, SUBSCRIBE, and hit the notification bell for more Behind The Walls content!#Retrofit #HomeRenovation #EnergyEfficiency #BERRating #HeatPump #VacantHomesGrant #SEAIGrants #EricDonovan #BehindTheWalls #IrishConstruction #SustainableLiving #ExternalWallInsulation #SolarPanels
In this episode of Behind the Walls, Pete and Ferg sit down with Roisin Mulligan and Orla Ní Cholmáin to discuss the Home Energy Upgrade Loan scheme. They break down how homeowners and landlords can access low-cost financing for retrofits, tackle energy efficiency upgrades, and improve comfort in their homes.From eligibility to application steps, loan details, and real-life case studies, this episode covers everything you need to know about making your home warmer, more energy-efficient, and more affordable to maintain.
In this episode of Behind the Walls Podcast, Pete and Fergal sit down with Stuart Hobbs, Director of SSE Airtricity Energy Services and Solutions, to talk about Ireland’s energy future. From solar and wind power to home retrofits, grants, and the truth about heat pumps, this episode digs into how Irish homeowners can take control of their energy use and become part of the transition to a net-zero future.Stuart shares insights into the evolving energy industry, how consumer awareness is changing, and why the phrase “location, location, energy” might soon replace the old saying about property value. The lads also bust a few myths about home upgrades, grants, and what it really takes to make your home greener and more efficient.Whether you’re considering solar panels, retrofitting, or just curious about how energy systems are evolving in Ireland, this episode is packed with useful information and light-hearted chat.🎙️ Hosted by Pete & Fergal📺 Subscribe for more real conversations about energy, retrofitting, and sustainable building in Ireland.💬 Like, comment, and share your thoughts below!#BehindTheWallsPodcast #EnergyIreland #SolarPV #HeatPumps #SSEAirtricity #Retrofit #HomeEnergyUpgrade #Sustainability #IrishHomes #RenewableEnergy
In this episode of Behind the Walls Podcast, Pete and Ferg dive deep into the world of ventilation, air quality, and home health with expert Simon, a leading ventilation consultant. From understanding why ventilation is essential in modern airtight homes to exploring the link between air quality and long-term health, this episode is packed with insight for homeowners, builders, and retrofitters alike.Simon explains how better ventilation can reduce condensation, mould, and poor air quality, and even help prevent chronic illnesses. The lads also discuss practical options for residential ventilation, from trickle vents to full mechanical systems, and why every home needs a tailored solution.If you’re upgrading your home or just curious about creating a healthier living environment, this one’s for you.🎙️ Hosted by Pete & Fergal📺 Subscribe for more expert chats about homebuilding, retrofitting, and sustainability.💬 Got a question or topic suggestion? Leave it in the comments!#BehindTheWallsPodcast #Ventilation #HomeEnergy #AirQuality #Retrofit #HealthyHomes #ConstructionIreland #BuildingBetter #Sustainability
In this episode of Behind the Walls, Pete and Ferg sit down with Henry Sheehan, Chairman of the National Insulation Association of Ireland (NIAI). With almost 50 years in the industry, Henry shares his incredible journey, the evolution of insulation in Ireland, the importance of “fabric first”, and how government schemes and retrofits are shaping the future of energy-efficient homes.If you’re a homeowner, builder, or just curious about how insulation impacts comfort, savings, and sustainability - this conversation is packed with insights you won’t want to miss!👉 Don’t forget to like, comment, and subscribe for more episodes of Behind the Walls!Music Licence: OSH3CWE15MXRFQC5
Welcome back to another episode of the Behind the Walls podcast! This week, Pete and Ferg are joined by Ciarán Mulqueen, also known as Crazy House Prices, to dive deep into retrofitting and the construction industry.Follow Ciarán Mulqueen:Instagram: @crazyhousepricesDon’t forget to like, comment, and subscribe for more insights from the construction world!Music Licence: OSH3CWE15MXRFQC5#BehindTheWallsPodcast #Retrofit #ConstructionIreland #HomeEnergyUpgrade #HousePrices #SustainableLiving #HomeRenovation #HeatPump #SolarPanels #DublinHomes
In this episode of Behind the Walls, Pete and Ferg are joined by Stephen from the Sustainable Energy Authority of Ireland to talk about home energy upgrades, SEAI grants, and how homeowners can save money while improving comfort. We break down the Better Energy Homes scheme, One Stop Shop programme, and the Warmer Homes scheme, making retrofitting simple and jargon free.Discover how to access grants for attic insulation, cavity wall insulation, solar panels, and heat pumps. Learn why fabric first is key, how to futureproof your home, and what the new Traditional Homes pilot scheme means for older properties.Whether you are a homeowner looking to save energy or a builder wanting to understand SEAI schemes, this episode is packed with practical advice.Subscribe for more expert advice on retrofitting, energy savings, and sustainable building in Ireland.#SEAI #Retrofit #EnergyEfficiency #HomeEnergyUpgrade #SustainableBuilding #BehindTheWallsPodcast #Ireland
In this episode of Behind the Walls, Pete and Ferg are joined by Ciaran from SEAI to talk about Ireland’s energy future, retrofit programmes, and how homeowners can save money while making their homes more energy efficient. This conversation covers everything from grants and funding to practical retrofit advice for homes old and new.Learn how SEAI supports homeowners, contractors, and communities, and discover the step-by-step process to access grants for insulation, solar panels, and heat pumps.Follow for expert advice on retrofitting, sustainable energy, and making your home more efficient.#SEAI #EnergyEfficiency #Retrofit #HomeImprovement #SustainableLiving #BehindTheWallsPodcast #Ireland
Meet Pete & Ferg!Pete knows the building game inside out, and Ferg’s all about energy efficiency. Together, they’re cutting through the noise to make construction, retrofitting, and energy upgrades easy to understand.Behind the Walls is your go-to podcast for straightforward home advice, with episode one dropping 17th September on all streaming platforms - proudly sponsored by 🐻❄ Envirobead









