Resistance to the flow of heat is measured in “R-value”, the higher the R-value, the harder it is for heat to get through. STYROFOAM extruded polystyrene insulation is rated at an R-value of 5.0 per inch at 75°F. The material R-value for the entire wall assembly is derived by adding an R-value of Styrofoam0.
Is Expanded polystyrene good for insulation?
EPS is 90% air because it is not very dense – the fact that it is made up of lots of small polystyrene beads means that there are lots of tiny air pockets. This is what makes it a great insulator.
What is the R value of expanded polystyrene?
3.6 per inch
EPS insulation features an average r-value of 3.6 per inch. In addition to providing energy efficiency, EPS without film facers has a perm rating of up to 5.0.
What are the advantages of extruded polystyrene foam sheathing?
Energy-efficient, easy to install, lightweight, and recognizable in its blue, pink, or green colors, the specification of extruded polystyrene foam sheathing may allow the use of a single product to create a continuous layer of thermal and moisture protection on a building’s walls, thereby contributing to energy efficiency.
What type of insulation should I use for wood sheathing?
If wood sheathing is used as a structural component, the building can be covered with extruded polystyrene (XPS) foam insulation boards to provide for full wall insulation.
Can rigid insulation board be used as a primary sheathing?
The opportunity that presented itself was the integration of the exterior rigid insulation board into the enclosure assembly to act not only as insulation but also as the primary sheathing and, in certain areas, as the drainage plane and vapor control layer for the wall assembly.
What is extruded polystyrene (XPS)?
Extruded polystyrene (XPS) foam sheathing can have positive energy and air emission benefits when used in residential buildings. Properly installed extruded polystyrene (XPS) foam can also improve a building’s energy efficiency by providing a complete layer of insulation on the wall.
