NHBC tanking requirements

BAL has an approved EAD-certified tanking system that meets new NHBC tanking requirements for bathrooms, showers and wetrooms in new build homes.

From January 1st 2025, NHBC the UK’s leading provider of warranty and insurance for new homes in the UK implemented new requirements for their members.

This will mean that any new house in the UK that is built (foundations laid from 1st January 2025) will require tiling in wet areas to be tanked with an EAD certified system to receive warranty and insurance, if they are tiling:

  1. Shower over bath OR shower with shower tray, with standard flow rate <12 litres/min – WHEN the substrate manufacturer’s guidance advises a tanking system is still required, or has not passed NHBC Table 2 assessment requirements.
  2. ANY shower over bath OR shower with shower tray, with a flow rate >12 litres/min.
  3. ANY wet room (fully tiled wall and floor, shower area).

BAL Waterproof 1C is part of an approved EAD system suitable for use with NHBC regulations. It is:

  • The only one-coat solution with EAD certification
  • Cost-effective and rapid-system
  • Easy to apply with brush, roller or 4mm notched trowel
  • Tile on in only 2 hours!

In some areas – such as around pipework, junctions and drains, and where tiling direct to wetroom floors – some additional ancillaries are required including:

EAD certification also requires the use of specific approved tile adhesives with each approved EAD waterproofing system. BAL has multiple option from our existing  core range of adhesives that can be used with BAL Waterproof 1C.

For tanking outside of NHBC installations, BAL Waterproof 1C can be used as prior (no need for additional tapes or matting).

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