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What is the R-value of foam board insulation? Foam board insulation R-value varies based on type but is anywhere from 3.6 per inch of insulation thickness to 8.0. The types of foam board insulation include polyurethane, polyisocyanurate, extruded polystyrene foam, and expanded polystyrene foam.
Foam board insulation has around 3.5-5.5 R-value for every inch. However, these numbers may vary according to the variation of the original product being used. Keep on reading if you plan on learning a thing or two about foam board and the R-values of its different forms.
Learn all about insulation R-values and how they help keep your home cozy and save energy. Find everything you need to know with these insulation R-value charts.
Discover the importance of rigid insulation R-value per inch. Learn about the best options for high R-value rigid foam insulation in buildings.
Is A Higher R-Value Better For Insulation? This goes without saying; higher R-values are better for insulation. The relationship between R-value and insulation is positive and linear. Example: An R-10 insulation is twice as effective as R-5 insulation.
Foam board insulation products types and sizes. Learn about R values, uses and benefits of insulation board. Read more about this DIY guide to foam board.
Rigid insulation like rigid foam and foam boards have high R-values. That’s why materials like polyiso (polyisocyanurate), EPS (expanded polystyrene), and XPS (extruded polystyrene) like Styrofoam make for such good insulation materials.
Foam Board Insulation R-Value Chart by Type. There are many kinds of foam board insulation. All of them have a unique R-value. Let’s look into these foam board insulation R value:
Polyiso provides the highest R-value per inch of the three foam board insulation options listed. With R6.0 per inch, you can achieve R15 with just 2-½”, and save half an inch of material if you use XPS (R15 XPS requires 3” thickness).
Insulation made easy: explore R values for EPS, XPX, ISO, and spray foam. Our rigid insulation R values chart simplifies choices for energy efficiency.