U.L. Class 90

[jimzpe]

I've been asked to inspect some existing roofs by an insurance company to certify compliance with U.L. Class 90 ratings (UL 580). Anyone else delt with this question and can it be done?

 

[Ron]

You can't "inspect" to certify to UL Class 90. That is a tested procedure and your roof assembly either meets it or it doesn't. Check the membrane manufacturer for their compliance documents.