![]() This graph above shows insulation values of RAYCORE SIPs and Sandwich Panels at the more commonly reported real-world R-value of 40 ☏ as will be found on most SIPs Panel manufacturers websites. ![]() For this reason, in the ASTM C518 testing process, insulation R-values are recorded at other temperatures. In the real world, most of us live where the average daily temperature is less than 75☏. Most insulations perform better, sometimes significantly better, as the temperature drops. In colder climates where your heating costs are high, you might be more interested in the insulation's R-value at maybe 60☏ or 40☏ or maybe even 20☏, but for this comparison chart, RAYCORE will use the ASTM C518 Standards at 75☏.Ĭomparing Insulation R-Values of RAYCORE SIPs to Sandwich Panels In the US, the apples-to-apples R-value standard is ASTM C518, and the test results are reported a temperature of 75☏. It is important that, when you compare the R-values of different insulations, you know at what temperature the product was tested. ![]() With most types of insulation, as the temperature drops the R-value increases, but some perform much better than others. The chart below can help you compare some of the more common materials and approaches to insulating homes along with their corresponding R-values. The higher the R-value the better resistance and less insulation thickness is required to achieve the insulating effect you desire. Consequently they have a higher resistance value or "R-value". Some wall and roof insulations are better at resisting heat flow than others. When comparing insulation R-values *, it's important to understand that not all insulations are alike. Ultimately, the goal is to maintain a comfortable living environment while saving energy and ultimately money. And when it's hot outside the heat comes inside. Remembering that heat always goes to cold, heat flow, or transfer of heat, occurs when it's cold outside and the heat escapes from your home. The main purpose of insulation in a home is to reduce or prevent heat flow.
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