O standard 25.
Eps vs xps under siding.
Eps costs 10 to 30 less than xps per equivalent r value and compressive strength.
Additionally eps is usually present in structured insulated panels.
Due to its physical properties xps has a higher r value than eps at 4 7 per inch.
Expanded polystyrene eps foam is a closed cell insulation that s manufactured by expanding a polystyrene polymer.
Ach foam technologies has made it easier for contractors and specifiers to see this with comparable features unavailable until now.
In the past xps manufacturers were able to claim r values closer to 5 0 per inch.
However eps insulation has proven to perform just as well in such situations.
O expanded polystyrene eps is a durable rigid foam plastic material that is.
The appearance is typically a white foam plastic insulation material the likes of which can be found as merchandise packaging.
Xps products product features.
Unfaced 1 in thick xps has a perm rating of around 1 making it semipermeable.
Since eps is lower cost per inch than xps and is available in a range of compressive strengths from 10 to 60 psi using it belowgrade and under slabs can save on insulation costs.
Xps comes unfaced or with a number of different plastic facings.
O siding underlayment o pre cast wall panels.
Polystyrene insulations eps and xps provider k 031 course eps 104 1 lu hsw sd.
Neopor graphite polystyrene gps is highly efficient rigid foam insulation used in various remodeling and new construction applications such as behind new siding below grade and below slab.
Neopor can provide up to 20 more energy savings than traditional white expanded polystyrene eps insulation.
Compatibility xps vs eps insulation for contractors working with a building made of concrete xps tends to be the preferred form of rigid foam insulation.
However the blowing agents used in the manufacturing process were known to deplete overtime reducing the insulation value.