Cheapest Exterior Cladding Materials
EPS foam siding has much better insulation per inch than other insulation materials , with R-values ranging from 3.6 to 8.0(i.e. plywood has an R-value of 1.25 and fiberglass sheets have an R-value of 3.14) . This is critical in preventing damage (such as mold and rot) to frames and walls, especially in regions with extremely cold or humid climates. As the foam is applied to the exterior, it also prevents thermal bridging. It is one of the most inexpensive exterior cladding materials . Thermal bridging occurs when there is heat loss due to cutting ofa more conductive material in the insulator. This is usually internal insulation .happens when it intersects with things like stud frames or electrical boxes.
Better at controlling humidity In controlling humidity, rigid foam performs two functions. Protects the wood case or frame from rain or water seeping under the cladding. In winter, it heats the inner case or frame to prevent moisture build-up from the heated indoor air . When sealed with the right sheathing techniques and a suitable adhesive, rigid foam is an excellent air barrier. The same principle mentioned above, which prevents thermal bridging, also applies to air transfer. Unlike home wrap, which tries to prevent leakage (preventing air from entering the building) but insufficient at stopping leakage (air leaving the building), rigid foam can do both.
There is often confusion between expanded ( EPS ) and extruded polystyrene (XPS), with many people assuming they are actually the same, but in reality expanded and extruded polystyrene are very different products.
First, there is the manufacturing procedure involved in creating the product. Expanded Polystyrene (EPS) is made using small expandable beads that swell with heat and are then placed in a mold where they expand to fit the shape. The expanded beads trap air, which gives expanded polystyrene its insulating properties, but also leave the insulation resistant to water absorption, reducing its effectiveness over time.
Extruded Polystyrene (XPS) is made by mixing pellets of polystyrene with liquefiing chemicals. A blowing agent is injected into the mixture, which creates billions of miniature air pockets. This foaming mixture is then pushed into a forming die to give the desired size and minimize waste. After cooling, the boards can be further shaped and wasted back into the manufacturing process.
Extruded Polystyrene's unique manufacturing process provides superior R-value compared to expanded polystyrene and many other building materials. This enhanced efficiency helps reduce temperature fluctuations and increase energy efficiency for the entire product lifecycle. It can be defined as the perfect sheathing material and exterior jamb coatings.