Underwater Construction

Underwater construction and maintenance has become a necessity for many clients who cannot surface their ships or infrastructure for maintenance or repairs. It has required Franmarine to be innovative – to engineer new systems and underwater construction practices and accommodate the client’s needs.

Franmarine’s experience is vast, with projects requiring varied underwater construction services such as slipway maintenance and repair, jetty maintenance and repair, pipeline installation and maintenance, pile wrapping - Denso Seashield and underwater expoxy coating systems.

Underwater construction services:

In-water Surveys and Inspection

  • Jetty Piles
  • CCTV Video Inspection
  • Still Photography

Corrosion Inspection and Protection

  • Denso Seashield
  • Grit Blasting
  • Alocit Underwater Epoxy Paint

Subsea Welding

  • Temper Bead Wet Welding
  • Anode Replacement
  • Sea Walls
  • Subsea Cutting
Hydraulic Tools
  • Cutting
  • Drilling
  • Grinding
  • Chainsaw
  • Subsea Drilling, core samples
  • Pipeline Installation and Stabilisation


  • Demolition
  • Rapid Emergency Response
  • Jetty Maintenance
  • Environmental Impact Statements
  • Slipway Repair

Related projects:

  • BAE ship lift facility cathodic protection
  • Underwater epoxy coating paint system trial