Is it true that as thicker insulation is applied around a pipe that eventually the increase in surface area compared to the increase in thickness results in the R-value decreasing rather than increasing?
Ignore that other answer, the area of a circle is pi radius^2 Which in this case is 9 piIn decade form this is 28.27433388 To the nearest tenth this 30,not to sure about the rounding because I've not used them in such a long time.
