This variation makes XPS a stronger type of foam and better able to withstand water and other stresses. EPS and XPS are both closed-cell types of foam, and XPS is considered a fully-closed matrix while substantial space exists between the cells in EPS foam. Similar to EPS, XPS is made through a different manufacturing process to give it different material properties. The R-value per inch of EPS can change based on the desired density of the foam, but it is typically in the 3.6 to 4.1 range. The closed-cell nature of EPS keeps water absorption low and improves R-value. Fiberglass insulation makes up the bulk of insulation used in new home construction, accounting for 71% of insulation based on a 2018 report.ĮPS foam is a lightweight, rigid type of foam board. Batt fiberglass insulation has an R-value per inch of 3.1 to 3.4 while loose-fill fiberglass can range from 2.2 to 4.3 per inch of thickness. One of the most common types of insulation, fiberglass typically comes in either batt or loose-fill form. Here are some of the most common insulation types: Many different types of insulation are available on the open market with some being higher performing than others.
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