Surface prep
Pressure washing, mechanical abrasion, and infiltration control (hydraulic cement plugging) prepare the substrate. Prep is inspected before any material is applied.
Structural & corrosion-resistant
Stop infiltration and corrosion at the source.
Manholes are the connection points that fail first. CEI restores them structurally — top of the frame to the outlet channel — with cementitious coating systems matched to the environment.
The problem
Corroded manholes drive I&I, damage treatment plants, and hide worse defects below.
Hydrogen sulfide, groundwater infiltration, and years of freeze-free Florida acid attack turn concrete manholes into the weakest link in a collection system. CEI's rehab program addresses the mechanism — not just the appearance — of that deterioration.
- Stops inflow and infiltration at the chimney, frame-to-cone joint, and cone-to-riser joints
- Restores compromised wall thickness with high-strength, corrosion-resistant cementitious mortars built for wastewater environments
- Rebuilds failed benches and inverts to smooth, hydraulically sound geometry
System
A cementitious rehab program, specified per structure.
CEI runs a cementitious-only rehab program. Material and thickness are specified per structure based on H₂S exposure, wall condition, and asset criticality.
Structural rebuild
Fiber-reinforced cementitious mortars rebuild wall thickness and restore structural integrity to the specified compressive strength — walls, benches, inverts, and cone.
Corrosion-resistant coat
Calcium-aluminate cementitious systems purpose-built for sanitary sewer H₂S environments. Applied to spec thickness and confirmed by depth-gauge readings per structure.
Cementitious base coats
Calcium-aluminate mortars
Fiber-reinforced cementitious
Chimney seals
Bench & invert restoration
Frame & cover reset
Before & After
Same structure. Two site visits. Measurable difference.
A South Florida sanitary manhole with severe H₂S corrosion of the invert bench and walls — documented at intake, rebuilt and coated with a corrosion-resistant cementitious system, and re-documented at closeout.
Deliverables
Every structure documented — before, during, and after.
Pre-condition report
Photographic condition survey with wall-loss estimate, infiltration mapping, and NASSCO MACP-style scoring per structure.
Coating log
Mixed-material batch numbers, ambient conditions, wet-film readings, and cure times recorded per lift, per structure.
Final QC
Post-application photographs, holiday testing (where specified), and a per-structure closeout summary with GPS coordinates.
Warranty support
Manufacturer-backed warranties on approved coating systems, plus CEI's own workmanship warranty on the installation.
Bidding a manhole rehab package?
Send the structure list, MACP scores, or as-builts. We'll price it by system, per structure, with production rates that hold up.