![]() ![]() U-Value = 1 / R-Value for all of theses systems.Metric R-Value = 0.1761 x Imperial Inch-Pound R-Value.R-Value USA / 5.685 = RSI-Value Europe or "metric" or "SI" units R-Value = Imperial R-Value = R = (Heat Resistance x Degrees F x square feet) / BTUs To convert among R and U values in these different systems: RSI or metric system or European R-Value - written here as RSI or as R-value Metric.Imperial R-Value - written here as R-value Imperial.Generally there are three different R-Values: The "R" value of a material is the material's resistance to heat flow through the material, but different countries or areas of the world use and compute these values differently. In general all of the measures of heat-loss or heat-gain insulating properties of materials are measuring the rate at which heat flows through a material. Quick Links to Often-Requested Material Insulating PropertiesĬonversion Among US, Metric & Imperial R-Value and other Insulating or Rate of Heat Loss/Gain Value Metrics Tip: Also use the page top Search box to look for our articles about specific insulating materials and their properties. There nearly all building materials are found as well as the insulating properties of other materials of interest such as air, dirt or soil. Or use CTRL-F in your browser to search by insulating material name, such as brick. Use the links just below to skip directly to popular insulation materials or just skip directly to the start of the COMPLETE INSULATION DATA TABLE where you will find that we list all building materials and insulating materials in alphabetic order. These tables give R-values of all sorts of materials, in alphabetical order with direct links to some popular insulating materials give the insulating value of any material of interest in constrution, for example: air, fiberglass, masonry mateirals, mineral wool, cellulose, foam insulating board, UFFI, soil or dirt, vermiculite, wood, & most other building materials. Table of Characteristics of Various Insulating Materials: We also provide an ARTICLE INDEX for this topic, or you can try the page top or bottom SEARCH BOX as a quick way to find information you need. ![]() Formula-R and Owens Corning which may be visible in this photograph of pink Styrofoam insulation boards are registered trademarks of Owens Corning and were photographed at a Home Depot® building supply center. This article provides a Table of Insulation Values and Properties for Various Insulation Materials useful in procedures to measure or calculate heat loss in a building, defines thermal terms like BTU and calorie, provides measures of heat transmission in materials, building insulation design data, and Insulation R values of various materials: We have no relationship with advertisers, products, or services discussed at this website. InspectAPedia tolerates no conflicts of interest. ![]()
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