Milcor specializes in manufacturing Heat & Smoke vents, Roof Access Hatches, and Access Doors available nationwide through a network of local stocking wholesale distributors.

Portals Plus specializes in stock rooftop accessory products for the roofing, HVACR, and plumbing trades.  All Portals Plus products are available nationwide through a network of local stocking wholesale distributors.

Roof Products & Systems (RPS) specializes in custom manufactured roof curbs and supports for HVACR.  All RPS products are available nationwide through a network of local representatives.