Allied Spray Foam Share: Insulation Contractors Allied Spray Foam Visit Website 2624 Avent Ferry Road Holly Springs, NC 27540 (919) 971-0869 About Map About Spray Foam Insulation Installer, 13 years in the business, New Construction and existing homes, Sealed Crawl spaces, sealed attic assemblies. Open and Closed Cell Spray Foam. What's Nearby? Distance: 5 10 15 20 25 50 mi.