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Global Wholesale Supply

PO Box 413
Grasonville, MD 21638


Service area: 200 miles

Service Area: Product available throughout North America


Suppliers of FSC wood fiber insulation products used in roofing, sheathing and interior insulation. These products provide superior thermal storage capacity, low thermal diffusivity, vapor permeability, sound deadening and indoor air quality. The perfect solution for lowering energy usage and the insulation of choice for LEED building, Passive Houses, CLT structures.


Working with CLT and Passive House builders to provide expertise in meeting their insulation goals for their projects. Global Wholesale Supply has extensive technical resources in Europe that can provide the knowledge from decades of experience in green building with wood fiber, CLT and Passivhaus projects.


Will Grupenhoff has been directly involved with the design process of 5 designed to be LEED Platinum projects and has been involved with sustainable building products for 14 years.