Structural Waterproofing

Structural Waterproofing

Leaking Basements

Since many durability problems also can be related to poor quality control as well as special problems during concrete construction, the issue of construction quality and variability must also be firmly grasped before any rational approach to a more controlled durability can be achieved. Therefore, a performance-based concrete quality control during concrete construction with documentation of achieved construction quality and compliance with the specified durability should also be carried out.

Our Process

Structural Waterproofing

New Construction

Co-mender’s below grade waterproofing system is an advanced engineered solution that
Elements of Co-mender’s structural Waterproofing system:

  • Engineering
  • Watertight concrete
  • Post-tensioning System
  • Waterstops


Co-mender’s Engineering experts collaborates with designers and building firms throughout all stages of design and construction. It provides specialistion costs and time, and guarantees the effectiveness of the waterproof structure.


  • Design the post-tensioning system for vertical walls to reduce or eliminate cracking
  • Advice on the design of underground structures.
  • Revision and Approval of waterproof mix design
  • Checks on steel reinforcement shrinkage requirements.
  • Checks on concrete, both on-site during construction and testing in the laboratory.
  • Checks on the laying of steel reinforcement and concrete casting.
  • Check on the joints sealing system and cracks inducers if needed
  • Construction management including High quality dossiers with records, photographs and plans for laying all Co-mender’s technologies systems.

Co-mender’s waterproof concrete

Co-mender’s engineering adapts the mix design to suit the characteristics of the structure chosen by the customer with or without special additives.
Co-mender’s Engineering team carries out checks on construction both on site and in the laboratory using Co-menderAIR technology to ensure the waterproofing qualities defined in the mix design are transferred to the structure.

Co-mender’s Waterstop

The special Waterstop have predrilled channels – easily accessible from inside the structure – to allow maintenance injections against any infiltration. 

  • Injectable Waterstop tapes for diaphragm joints.
  • Waterproof diaphragms without further additional structures.
  • Maintenance injections are simple and safe, with easy access from a special junction box.

The Drytech Tank always allows waterproofing to be re-established by injecting DRYflex expanding resin from the underside of the structure. Since the Drytech Tank is a single structure, the cause and effect of any infiltrations can be verified in the same place, enabling accurate work to be carried out and results can be checked immediately by visual inspection. There is no requirement to block the structure.
For the same reason, Drytech maintenance systems are also used in the restoration of other types of waterproofing.
Many systems offer waterproofing for structures. However it is only practical, non-invasive maintenance which guarantees waterproofing over time.

Our Maintenance, the guarantee for waterproofing

The need for maintenance of any waterproofing system is fundamental as well as underrated. Theoretically all systems work. In the real world, unexpected things occur which can however be easily foreseeable: from the human factor during laying, to common hitches during construction (backfill which rips a sheet or reinforcement which makes a hole in a membrane).

Our Process

Our team

Comender for Experts & Contractors Service

Contact us if you would like to have a full service agreement or to wish to learn more about how to protect your concrete structure

If you detect any defect in your Existing structure or During construction