First, as yet there are not any legal guidelines in place for roof certification so the true value of a roof certification is most certainly relative to the qualifications of the inspector. For example there are roofing contractors that offer “free roof inspections” and roof certifications, they have “inspectors” who have never put on a roof, or sometimes just people they happen to know who are in need of work, that will come out and do a “free inspection” with the contractor never seeing the roof at all.
http://www.roofdoctor1.com/blog/Roof-Inspection-Roof-Certification
