【この断熱材】を施工すると健康被害（免疫低下やアレルギー）を引き起こす可能性がある。身近に広がる有毒イソシアネート汚染の怖さを知るべき。新築、注文建築、DIY、リフォームを検討中の方必見

This time, we'll be discussing insulation materials. In particular, we'll focus on the main insulation materials used in homes: glass wool, rock wool, cellulose fiber, and spray polyurethane foam. First, the purpose of using insulation is to block heat transfer between the interior and exterior of a building, making it difficult for outside temperatures to enter the interior. Maintaining airtightness by installing insulation materials with low thermal conductivity without gaps is one of the factors that contributes to achieving a home that is "cool in summer and warm in winter," and preventing condensation caused by temperature differences between the inside and outside of the building. You might think, "Then the best insulation material is the best!" but it's not that simple. There is one type of insulation material that uses a material that can potentially cause serious health problems. That material is "isocyanate." Have you heard of it? Isocyanate is the main raw material for (poly)urethane and is used in various products such as tires, mattresses, asphalt, and waterproofing work, but recently it has also come to be used in spray insulation for new construction. The problem is that while isocyanates pose few problems once solidified, they are mixed with water and foamed on-site, meaning a certain amount volatilizes before they fully solidify. Furthermore, in the humid environment of walls, they can decompose due to moisture and heat, and cracks during earthquakes can affect indoor air quality. However, the construction industry has little awareness of the dangers, and is using them as a safe, formaldehyde-free insulation that can be installed without gaps. Isocyanates are highly toxic substances that damage skin and mucous membranes and stimulate the nervous system. They are also carcinogenic. Even small amounts can harm people, but once an allergy is triggered, even smaller amounts can cause severe reactions. You understand now, right? This video focuses on "insulation materials you should not use" before discussing what the best insulation material is. This content should be helpful for those planning to build a house, or those considering renovations or DIY projects. Please enjoy watching until the end. [Chapters] 00:00 Intro 00:25 Opening 01:10 What is Insulation? 02:10 The Relationship Between Health and Insulation 05:10 Types of Insulation Installation Methods 08:30 Characteristics of Different Types of Insulation 15:55 About Airtightness 18:23 Insulation Materials You Shouldn't Use 22:42 Be Careful with Laundry Detergents and Fabric Softeners 25:35 What is the Optimal Insulation Material? 26:27 Here are the Criteria for Choosing! ~Outro #NewConstruction #Renovation #DIY