Converting an existing basement or cellar into a habitable space can add substantial value to a property, whilst also increasing living space.
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, depressurises 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 ingressing water, it is widely accepted to be the most failsafe 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.
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 impossibilty 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 depressurise 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 Basedrain can be linked to Newton sump and pump systems.
Example of Type C Waterproofing
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
Newton highly recommends that installation is undertaken by a Newton Specialist Basement Contractor (NSBC). As well as fulfilling our strict entry criteria, training and vetting procedures, NSBCs can provide a substantial insured guarantee and take full design liability on the project, fulfilling the role of ‘Waterproofing Specialist’ as recommended by BS 8102:2009.
Please contact us for a list of NSBCs in your area.
For any further information about basement waterproofing systems, or for any technical advice about your waterproofing project please contact us on 01732 360 095 or firstname.lastname@example.org.
Detective Sgt Maria Banks, Local CID, Oxford Police Station
Testimonial Written During Oxfordshire Floods, Work undertaken by Newton Specialist Basement Contractor Stonehouse Property Care