North East Kingdom Spray Foam Co. provides spray foam insulation services in the NEK region of Vermont and northern New Hampshire. Headquartered in St. Johnsbury, Vermont – we are available to spray foam your new construction (residential or industrial), basements, attics, roofs, additions, or under slab. Offering both closed-cell and cellulose (open-cell) insulation materials, we can help guide you in choosing the right options to provide the maximum R-value energy efficiency.