Newton HydroBond System Explained

8 Dec 2021

The British Standard for Waterproofing, BS 8102:2009 defines three ‘Types’ of waterproofing:

Type A (barrier) - Where a barrier membrane, liquid or sheet, is applied to the structure, either internally or externally.

Type B (integral) - The structure itself is the waterproofing.

Type C (drained) - An internally applied drainage system collects and removes water that has managed to pass through the structure, or the waterproofing as described above.

The Newton HydroBond System is a high-performance, Type A waterproofing system designed to be applied to the outside of the structure. The system is either pre-applied below the concrete raft/slab and wall building line, or post-applied where conventional formwork is removed to expose the outside of the basement walls. 

Once installed and depending on the type of structure it is applied to, the combination of selected products within the HydroBond System can provide a continuous barrier around the full extent of the structure. 

Depending on the products employed, the HydroBond System can provide protection against both groundwater and ground gasses such as radon, methane, and carbon dioxide, making it the ideal solution where protection from any or all of these elements is required. 

Products within the HydroBond System

Sheet Membranes, pre-applied below raft/slab or to building line, prior to placement of reinforced concrete

  • HydroBond 403 Plus – Fully bonded self-healing membrane with reactive polymer hydrophilic core
  • HydroBond 403 Plus GB – Fully bonded self-healing membrane with additional aluminium core for optimised radon, methane, and carbon dioxide performance
  • HydroBond 402 CCS-M – Fully bonded waterproofing and radon protection membrane

Sheet Membranes, post-applied to walls after removal of formwork 

  • HydroBond SA – Self-adhesive sheet membrane with radon protection
  • HydroBond SAGM – Self-adhesive sheet membrane with aluminium core for methane and carbon dioxide resistance

Liquid-Applied Membranes, post-applied to walls after removal of formwork

  • HydroBond 2K-Flex – Thick bitumen compound applied in two coats, the first of which is reinforced, that is durable, flexible and provides both waterproofing and radon protection
  • HydroBond 109-LM – Radon certified, flexible, bitumen-based paint for both waterproofing and radon protection

HydroBond System Ancillary Products

  • HydroBond Tape – Adhesive jointing tape for the three pre-applied membranes
  • HydroBond SA Primer LT – Primer for the two self-adhesive membranes
  • HydroBond SA Reinforcing Strip – Reinforcement of the standard self-adhesive membrane at changes of direction
  • HydroBond SAGM Detail Strip – Reinforcement of the self-adhesive gas membrane at changes of direction
  • HydroBond 2K-Flex Primer – Bonding agent that also lowers porosity of concrete and masonry substrates
  • HydroBond 2K-Flex Mesh – 160g/m2 reinforcement mesh embedded within the first coat of HydroBond 2K-Flex
  • HydroBond 410 GeoDrain – Drainage and protection board that is applied to the waterproofing to protect the walls during the back-filling process
  • HydroBond Protection Board – Protection board that is applied to the waterproofing to protect the walls during the back-filling process

The table below confirms which combination of products can be used together depending on the project requirements:

 

Pre-applied below raft/slab

Pre-applied to walls

Post-applied to walls

Waterproofing only

HydroBond 403 Plus or

HydroBond 402 CCS-M

HydroBond 403 Plus or HydroBond 402 CCS-M

HydroBond 109-LM, HydroBond 2K-Flex and HydroBond SA

With radon protection

HydroBond 403 Plus GB or HydroBond 402 CCS-M

HydroBond 403 Plus GB or HydroBond 402 CCS-M

HydroBond 109-LM and HydroBond SAGM

With methane/carbon dioxide protection

HydroBond 403 Plus GB or HydroBond 402 CCS-M

HydroBond 403 Plus GB or HydroBond 402 CCS-M

HydroBond SAGM combined with HydroBond 109-LM or HydroBond 2K-Flex

Please note that in some cases, a combination of HydroBond 2K-Flex and HydroBond SA or HydroBond SAGM should be used together, especially where:

  • The wall surface is uneven and requires smoothing ready for the application of HydroBond SA or HydroBond SAGM.
  • The system is designed to avoid defects outlined in BS 8102:2009 Section 4.3.2.
  • The system is intended to eliminate lateral migration as per BS 8102:2009 Section 8, Figure 6.

Newton Waterproofing Index (NWI)

The Newton Waterproofing Index is a unique specification tool in the construction industry, providing specifiers and designers with a scoring system in order to accurately assess the level of risk and potential success involved in a waterproofing design. Further information can be found here.

Depending on the many considerations within BS 8102, some of which are highlighted above, the Newton HydroBond System can provide high-performance protection against ground water and ground gasses, either as a standalone system for the lower grades of waterproofing performance, or in conjunction with other Newton Waterproofing Systems where enhanced protection is required.

Having maintained our Professional Indemnity (PI) Insurance for waterproofing design for over 20 years, Newton is also able to support specifiers with our bespoke waterproofing design service, backed by our insurers and our PI policy.

Our team of dedicated technical staff are all trained Certificated Surveyors in Structural Waterproofing (CSSW) and able to assist you with your project, from design to quality assurance visits and on-site training via our specialist site support team.

Contact Newton Waterproofing on 01732 360 095, or email tech@newtonwaterproofing.co.uk to speak to a member of our team.