• Basement Waterproofing

    Basement and Cellar Waterproofing

    Converting an existing basement or cellar into a habitable space can add substantial value to a property, whilst also increasing living space.


    When waterproofing an existing basement, you will either install a:

    1. Type A System – Attempts to hold water back by applying a barrier (tanking) to the walls and floor of the basement or

    2. Type B System – Where the structure itself is considered to be integrally waterproof and a barrier is required for vulnerable construction joints or

    3. Type C System – An internal cavity drain system (drained cavity) which receives, depressurizes and then discharges water ingress.

    At Newton Waterproofing we always recommend that a Type C System is installed where a completely dry environment is required to manage ingress water, it is widely accepted to be the most fail safe basement waterproofing solution. Often Type C will be used in conjunction with Type A or B to provide a combination waterproofing system for maximum protection.


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    Cavity Drain Waterproofing (Type C System)?

    A Type C System is a below ground, internal waterproofing system, comprising a range of dimpled membranes, perimeter drainage and, if required, pumped systems for evacuating the water. Additional protection can be added with battery back up, control panel and generator systems for complete peace of mind.


    Type C Systems meet with the BS 8102:2009 Code of Practice for The Protection Of Below Ground Structures From Water From The Ground’ recommendations for a ‘maintainable waterproofing system’. This system is designed to accept that, due to the impossibility of 100% perfect preparation and installation workmanship on site, water could enter the internal space and therefore the wall and floor membranes and perimeter drainage channel create cavity areas to depressurize and manage the water, which is why they are sometimes referred to as ‘water management systems’. Once captured, water can be discharged from the property passively to open elevations or removed by mechanical means.

    Newton cavity drain membranes are applied to the walls and floors, with Newton Basedrain applied at the floor/wall junction providing a drainage channel to collect captured water from the structure. Where possible the water drains passively or if required the Base drain can be linked to Newton sump and pump systems.


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    Barrier Waterproofing (Type A System)

    Type A waterproofing systems are often referred to as barrier or tanking systems. These are applied to the structure. The Type A coating or membrane can either be applied internally or externally to prevent water ingress into the internal environment.

    There are many choices of Type A systems and it is essential to select the correct product to match the building type.

    Right: Newton System 500 cavity drain products (Type C) applied internally, Newton 403 HydroBond membrane (Type A) applied externally


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    Guaranteed Installation from a Newton Contractor

    Newton highly recommend that installation is undertaken by a Newton Specialist Basement Contractor (NSBC). NSBCs can provide a substantial insured guarantee and take full design liability on the project, fulfilling the role of ‘Waterproofing Specialist’ as recommended by the BS 8102:2009 ‘Code of Practice for Protection of Below Ground Structures Against Water From The Ground’. Please contact us for a list of NSBCs in your area.



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    Further Information

    For further information about waterproofing new or existing floors, above or below ground, or to speak to one of our technical experts, please ring 09 527 1829 or e-mail info@newtonsystems.co.nz