Treat the insulation materials as homogeneous, Whilst in true applications, rigid components have joints as well as cracks. Therefore, the U-value is often higher than what It might be In the event the insulation behaved as a homogeneous materials. Reference 2 provides assistance on calculating U-values. Continue to have questions https://martinnygnt.elbloglibre.com/34646499/the-smart-trick-of-noise-reduction-that-nobody-is-discussing