Rénovation sans isoler les murs : DPE B !

Can you really get a B-rated Energy Performance Certificate (EPC) for an old house… without wall insulation? YES! Can you defy the laws of physics, including those governing thermal performance? NO! In this video, I respond to a comment from a thermal engineer about a stone house built in 1857. He claims that a B-rated EPC is impossible without insulating the walls, but rather by correcting them with a thermal correction coating… I address several key points here: How the EPC actually works The limitations of current thermal approaches The excessive emphasis placed solely on the R-value in relation to insulation thickness The importance of actual occupant comfort The role of relative humidity, airtightness, diffusivity, phase shift… The question of radiant heating versus air heating The goal is not to pit approaches against each other, but to broaden the discussion. Physics is essential for everyone, of course. One condition for this (very valid) demand is the consideration of all the laws of physics, not just those that serve a dominant model focused on excessive insulation. At Soigner l’Habitat, we advocate for a more holistic approach: comfort at a lower cost, adapted to existing buildings, especially older ones, prioritizing occupant comfort over technical performance. Habitat specialists are trained to integrate these often-overlooked parameters. This video is a summary of what they can help you understand and… achieve! To learn more: Video:    • Isolation thermique des logements : que ré...   Article: https://www.soigner-l-habitat.com/iso... Energy Performance Certificate (EPC) Reference: EPC No. 2367E3411211C ==== ⏱️ Chapters 00:00 Introduction and context of the commentary 01:05 An EPC rating of B without insulation: is it possible? 02:30 The actual operation of the Energy Performance Certificate (EPC) 03:45 Insulation, lambda, R-value: the dominant view 05:10 The myth of the comfort temperature 06:30 Humidity, airtightness, and actual perceived temperature 07:40 Diffusivity and thermal inertia of buildings 08:50 Phase shift and limitations of the simplified approach 10:00 Air heating or radiation? 11:00 Towards a Holistic Approach to Housing ▬▬▬▬▬▬▬▬▬▬▬▬▬ 🏡 To Go Further 🏡 ▬▬▬▬▬▬▬▬▬▬▬▬ Thermal Comfort - Sustainable Housing - Effective Renovation // My Fundamentals for Effective Renovations: 👉 https://formation.soigner-l-habitat.c... // 150 Reference Articles: Soigner l’habitat: https://www.soigner-l-habitat.com/yd // My Two Books Published by Terre Vivante Ecological House: Building or Renovating? https://www.terrevivante.org/boutique... The Keys to Ecological Thermal Comfort: https://www.terrevivante.org/boutique... // My Social Media LinkedIn:   / claude-lefrancois-a93047114   Instagram:   / soigner.lhabitat   Facebook:   / soignerlhabitat   ▬▬▬▬▬▬▬▬▬▬▬▬▬▬ 🏡 Habitologist 🏡 ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ // How to become a Habitologist? 👉 https://formation.soigner-l-habitat.c... // Find a Habitologist near you? https://www.habitologue.com/yd: The directory of habitologists // What is a Habitologist? A Habitologist is an independent professional who guides clients to make their homes more comfortable, energy-efficient, healthy, and sustainable. They identify the factors that influence their comfort and provide the tools to make informed decisions based on a thorough understanding of their living space. Their impartial and objective approach ensures advice focused on their needs, free from commercial influence, thus preventing often unnecessary renovations. They help clients reduce the environmental impact of their homes and save energy. Finally, he offers solutions for preserving their homes and heritage in the long term. ▬▬▬▬▬▬▬▬▬▬▬▬▬▬ 🏡 Who am I? 🏡 ▬▬▬▬▬▬▬▬▬▬▬▬▬▬ // Claude Lefrançois, aka Papy Claude After 40 years in the building industry, including 20 years dedicated to ecological construction, I share my knowledge and experience. An author with Terre Vivante and host of the YouTube channel “Papy Claude,” I now devote myself to this knowledge transfer, which has led to my qualification as a Habitologist. These professionals help residents achieve their goals: comfort while reducing their environmental footprint (greenhouse gas emissions, resource conservation, etc.), and respect for the relationship between residents and their homes (housing longevity, budget, etc.). Former craftsman, former project manager, former timber-frame house builder, trainer in ecological construction and insulation, author of articles... My favorite word? Relevance!