Manhole Rehabilitation Compare Technologies, Costs and Contractors

Corrosion Protection

H2S Repair

Structural Renewal

H2S Repair

Chimney & Frame

Repair

Out of sight often means out of mind until a collapse occurs.

Manholes are the critical weak points in your collection system, responsible for up to 40% of total Inflow & Infiltration (I&I) and serving as the primary breeding ground for concrete-eating H2S corrosion. 

Ignoring these warning signs drains municipal budgets through excessive treatment costs, invites regulatory fines, and risks catastrophic structural failure. 

The challenge is no longer just maintenance; it is a race against decay to protect your most valuable infrastructure assets.

The Hidden Hazard

Explore Rehabilitation Technologies & Methods

Protective Coatings (Epoxy, Polyurethane & Cement)

Stop Corrosion & Restore Surface Profile:

Hydrogen sulfide (H2S) and biogenic corrosion can eat through concrete in months. Our directory features high-build epoxies, polyurethanes, and calcium aluminate cements designed to create an impermeable barrier against acid attack while restoring smooth flow. Best For:

• H2S Corrosion Protection
• Minor Surface Repair
• Extending Asset Life (10-50 Years)

Structural Liners (CIPM & UV Cured)

Structural Renewal Without Digging:

When a manhole has lost its structural integrity, coating isn't enough. Cured-in-Place Manhole (CIPM) liners and UV-cured glass-reinforced systems create a completely new, structural "manhole within a manhole." This restores full load-bearing capacity without excavation. Best For:

• Severely Deteriorated Concrete
• Structural Reinforcement
• Load-Bearing Applications

Chemical Grouting (Injection)

Stop Active Leaks & Stabilization :

Water infiltration through joints and cracks costs municipalities millions in treatment fees. Chemical grouting injects expanding hydrophobic resins into the soil and structure, forming a watertight curtain that seals leaks instantly—even against high hydrostatic pressure. Best For:

• Stopping Active "Gushers" & Runners
• Sealing Bench & Invert Cracks
• Stabilizing Loose Soil Behind Walls

Inserts & Panel Systems (Thermoplastics)

The "Forever" Solution (HDPE/GRP)  :

For maximum durability, fiberglass (GRP) or polyethylene (HDPE) inserts offer a factory-manufactured solution. These rigid liners provide superior resistance to chemical attack and freeze-thaw cycles, effectively lining old masonry with a brand-new industrial plastic vessel. Best For:

• Extreme Chemical Environments
• Total Inflow & Infiltration (I&I) Elimination
• Long-Term Asset Management (50+ Years)

Chimney Seals & Frame Adjustment

Seal the Top 12 Inches:

Over 40% of manhole infiltration occurs at the chimney section due to traffic vibration and freeze-thaw movement. Mechanical seals and flexible internal sleeves bridge the gap between the frame and the cone, ensuring a watertight flexible connection that moves with the road. Best For:

• Grade Ring Leaks
• Traffic Loading Zones
• Preventing Road Salt Damage

Trenchless Inspection & AI Coding

Smart Diagnostics & NASSCO Coding:

You cannot fix what you cannot see. Explore the latest in CCTV crawlers, 3D manhole scanners, and AI-driven defect coding software. Ensure your data meets NASSCO MACP or WRc standards before you tender a contract. Best For:

• Asset Inventory & Condition Assessment
• Pre-Rehabilitation Planning
• Quality Assurance (QA/QC)