Culvert Renew® Installation
Field-proven slip-lining workflow—from prep and pull to end-grouting and inlet finishing. Smooth installs, minimal disruption. Cable/plug checks, threaded joints, and managed grouting keep projects on schedule.
Culvert Renew Installation Bulletin
The following sequence summarizes recommended practices for cleaning, threading, pulling, trimming, and grouting a Culvert Renew® liner.
Clean the Existing Culvert
Use sewer/pipeline cleaning tools or high-pressure washing. A thoroughly cleaned host pipe reduces snags and speeds insertion.
Insert a Cable Through the Culvert
If you’re pulling (not just pushing), run a line end-to-end first—float a string during cleaning or use a tag line trick to guide the pull cable.
Verify Liner Fit
Pull a plug/pulling head to confirm clearance before committing. Keep a tag line on the plug so it can be retrieved if it binds.
Dropped Pipe or Offsets
Minor offsets often pull through. If not, re-round or jack the host pipe. Otherwise choose the next smaller liner size.
Pulling Heads & Nose Cones
Even when pushing, use a cone so the liner glides past small obstructions. A simple DIY cone can be made from a pie-cut liner ring and a pull cable.
Liner Pipe Insertion
Attach the pulling head to the first section, pull it in, then thread additional sections with a chain/strap wrench and bar. Block/brace to prevent twisting.
Let the Liner Relax, Then Trim
After pull-in, allow temperature and stretch to equalize. When stable, trim ends with a chain saw, circular saw, or hand saw.
Annular Grout Backstop
Install a backstop (wood, plastic, etc.) per engineer’s call—min. one liner diameter in length—to retain end grout.
Grout the Ends (Annular Space)
Place non-shrink hydraulic grout (e.g., Dry-Lok or equal) at ends. Methods vary: drill from above the host at the ring, or use a board dam. Some specs add small weep holes at the crown after set.
Grout the Full Annular Space (If Required)
For rare, critical hosts near collapse, fill the annulus with mud/slurry. Options include long grout pipes, centerline grout holes, or using the profile wall as a grout conduit (pre-drill along the crown). Control pressure to avoid liner collapse.
Build a Slope Box (Inlet Treatment)
Cut the liner to the embankment angle, excavate ~3'×3'×4–6" area, seal the pipe end, then form and pour a sloped concrete pad to protect the inlet and improve flow.
Pressure & Safety
Control grout pressure to avoid liner deformation. Follow engineer’s specs and local safety requirements for confined spaces, traffic control, and bypassing flows.
Need details for a specific site?
We can review host conditions, offsets, grouting sequences, and traffic/flagging plans.