R-value is a measurement of a material’s heat resistance. It’s used in the building industry, most often to refer to materials that make up insulation. It is essentially a ratio between the temperatures on either side of the material. It is expressed as the thickness of the material divided by the thermal conductivity.
A higher R-Value means that a given material is extremely resistant to heat transfer, meaning it would serve as a great insulator. Spray foam insulation, in general, has some of the highest R-Values of all commercially available insulation materials. Within the different types of spray foam insulation, closed cell foam is the highest R-Value spray foam. It’s normally around 6 per inch.
Closed cell spray foam also has the advantage of providing more strength to walls and structures and being more resistant to water vapour transfer, plugging up areas that can cause leaks.
Call the spray foam insulation experts at EcoTech for any questions you might have, we’re happy to guide you through the process: 613-296-6662