Can polystyrene insulation be used outside?
Extruded polystyrene (XPS) and foil-faced polyisocyanurate (polyiso) are high-density rigid-foam insulations that can be used as exterior insulation and are generally approved, per Building America(SM) to be used as a drainage plane if the joints are sealed.
What is InsulFoam used for?
This versatile rigid foam board can be used for new and retrofit roofing, exterior, interior & cavity walls, siding underlayment, insulating sheathing, continuous insulation sheathing, weatherproofing protection barrier, below grade, under slab, crawl space, perimeter insulation, drainage board and radiant heated …
Is InsulFoam waterproof?
The plastic film on Insulfoam sheets does not serve as waterproofing however. For true waterproofing and insulation in a single product, several companies offer underslab products that combine a flexible EPS core with two layers of vapor and moisture resistant materials.
What is the R value of InsulFoam?
about 3.9 per inch
InsulFoam EPS has R-values that vary depending on temperature and the density of the product installed. For instance, our standard R-TECH, sold in home improvement stores, has an average R-value of about 3.9 per inch at 75°F.
Is Expanded polystyrene waterproof?
Extruded polystyrene insulation (XPS) is manufactured using a process of extrusion. The closed cell structure of extruded polystyrene (XPS) prevents water penetration to the structure of the insulation board and provides long term strength and durability.
Will foam board hold up outside?
Any weight applied to a foam board sign could result in it bending or snapping, so we recommend not placing heavy items on the board. Likewise, this board is not waterproof and we highly caution against using the board outdoors, especially in harsh weather conditions.
Is InsulFoam fireproof?
TYPE IV PREMIUM FIRE RATED INSULATION The product’s thermal properties will remain stable over its entire service life. There is no thermal drift, so the product is eligible for an Insulfoam 20-Year Thermal Performance Warranty.
Can you glue InsulFoam?
Adhesives provide a convenient method for installation of InsulFoam EPS products. Proper selection of adhesives which are specifically designed for use with polystyrene foams must be used. Many adhesives contain solvents or other additives which can damage polystyrene foams.
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.
How do you protect styrofoam from rain?
Also, since extruded polystyrene is permeable to water, it doesn’t count as a reliable vapor barrier either. The only way to be used as a vapor barrier is by preventing waterlogging. This is done by waterproofing the styrofoam using spray-on coating or plastic sheeting, but more on that later.
Is expanded polystyrene foam waterproof?
EPS. Expanded polystyrene is commonly called beadboard. While polyiso, XPS and EPS have some of the strongest waterproofing properties of all insulations, EPS is the weakest of the three and absorbs more water. EPS is also susceptible to crumbling on the edges.