What Is Magnesite and Why It Needs Professional Repair

Magnesite is a cementitious, fire-resistant coating traditionally used for stairways, balconies, and walkways—particularly in mid-century and multifamily buildings. While it’s strong, it becomes brittle over time and is vulnerable to moisture if not properly maintained.

Our magnesite repair services include:

• Thorough inspection of cracks, delamination, and rust
• Removal of damaged or loose magnesite layers
• Substrate cleaning and re-priming
• Reapplication of new magnesite coating
• Textured or decorative resurfacing as needed
• Optional sealing with waterproof membranes for added protection
• Final inspection to ensure SB-326/SB-721 compliance

We repair magnesite decks over plywood or concrete in both exterior and elevated areas.

Benefits of Repairing Magnesite Decks

• Restores Structural Integrity & Safety
  Prevents accidents and reduces liability by eliminating trip hazards and soft spots.
• Cost-Effective Alternative to Full Replacement
  Targeted magnesite repairs extend the system’s lifespan without full demo.
• Improves Appearance
  Freshly resurfaced magnesite decks look clean, modern, and well-maintained.
• Prepares Property for Safety Inspections
  Repairs help meet SB-326 and SB-721 requirements for multi-family buildings.
• Adds Waterproofing Protection
  Option to add a modern membrane system for additional water resistance.

Ideal for Repairs On:

• Staircases & Landings
• Walkways in Multi-Unit Complexes
• Apartment & Condo Balconies
• Entryways and Breezeways in Commercial Buildings