placModern lightweight construction materials which are non-conductive, like plywood and fire cement sheets, require ILD Vector Grid installed beneath the membrane prior to the membrane being placed. Should the roof system include insulation (Thermal or Acoustic) the Vector Grid ise directly beneath the membrane to provide ILD to conduct an EFVM test.
3. ILD Vector 9 cable on surface
4. Waterproofing layer
5. ILD Vector Grid
10. Plywood/lightweight roof deck
Many large scale greenroof developments now utilize EFVM testing prior to and after overburden placement.