Northstar Specialties, Inc. installs both gypsum and self-leveling, cementitious underlayments. Gypsum underlayments are ideal for adding fire resistance and sound control to wood frame, multifamily construction. For rough, spalled concrete, we can install Level-Right Self-Leveling Underlayments from a featheredge, providing a smooth, durable new surface.

With our state-of-the-art equipment, underlayments install quickly, and they can be walked on in as little as 2 to 4 hours after the pour, keeping your project on track.


  • Gypsum cement-based underlayments with compression strengths up to 4500 psi
  • Portland cement based self-leveling underlayments with compression strengths up to 5500 psi
  • Laser Leveled Floors
  • Resurfacing lightweight concrete, spalled concrete, rough unfinished concrete
  • Therma-Floor underlayment as the heat mass for radiant floors
  • Smooth and level old wood floors
  • Leveling over hollow core and precast concrete planks
  • Encapsulating vinyl asbestos tile
  • Specification Assistance
  • Systems Advisors for:
    • Sound Control
    • Fire Ratings
    • Specifications