Basement Tanking Systems for Waterproofing RefurbishmentThere are still traditional bitumen tanking systems and polymer modified bitumen tanking systems available, but due to their bitumen content the smell is not generally considered suitable for internal use, even the water based bitumen emulsion types. They are however widely used for externally applied waterproof tanking and particularly in new construction works. For example Remmers Profi-Tight bitumen based tanking system.
A particular advantage of tanking systems is that they can be used on different substrates such as concrete, brickwork, natural stone etc. Therefore they can create a uniform substrate for the application of additional vapour tight or decorative finishes as required.
Basement tanking systems are therefore extensively used for basement and below ground structural waterproofing in accordance with BS 8102: 2009. Type A: Barrier Protection, in both new construction and in refurbishment waterproofing works).
Tanking systems are now the most widely used and well proven basement waterproofing solutions in refurbishment situations and also for both the new and refurbishment of lift-pits.
The installation of cement based multi-coat renders, mortars and coatings should, be left until as much as practicable of the structure and therefore its dead load has been built / installed to avoid subsequent settlement or cracking in the system.
The concrete, brickwork, render or stone substrate should be prepared to provide a key for the tanking system (liquid, slurry, render or mortar based products), with an open textured surface and pore structure in accordance with the relevant Product Data Sheet (PDS) prior to application of the system. Application can be by trowel, brush or spray, according to the specific products nature and function.
Details on application methods and rates, mixing, the number of layers/coats and curing requirements can vary quite considerably between different products and systems, so please contact any NCC Basement Waterproofing Site office for detailed information and advice for your specific waterproofing project.
Jointing in Tanking Systems – SikaDur CombiflexAny movement or expansion joints in the structure must be brought through the tanking system and a suitable watertight jointing system incorporated into the waterproof tanking system. The ideal jointing solution for this requirement is the well proven SikaDur Combiflex system, which combines durable elastic membrane strips with extremely high bond strength structural epoxy resin (SikaDur 31), which bonds it to the substrate on both sides of the joint – even over wide and two dimensionally moving cracks. The jointing system is applied prior to the rest of the basement tanking render systems, where the adhesive also provides the ideal key for the built-up tanking system (such as the Sika 1 Pre-bagged Tanking System).
Tanking Systems Detailing and InstallationTanking Systems Detailing and Installation - As detailed in our ‘Basement Waterproofing Contractors’ page, “ basement waterproofing must be carefully planned and executed by qualified personnel, fully cognisant of all of the relevant structural and technical details, plus the owners requirements, together with a full understanding of the implications of any possible waterproofing system failure or leakage – As strongly now also recommended in the revised BS 8102 (2009) a waterproofing expert should be an integral part of the design and onsite construction team. NCC is happy to provide this service and to help you find the right waterproofing contractors for your basement waterproofing project.”
We are actively involved in waterproof basement tanking projects all over the UK, every single day of the year. Indeed we have been doing this as a core business activity now for over 30 years. Take advantage of our practical experience and technical expertise with FREE independent advice from the NCC Basement Waterproofing Site specialists.
If you would like support and advice in selecting the most appropriate materials and waterproofing contractors for your basement tanking requirements, you can contact any NCC Basement Waterproofing Site office to receive FREE unbiased, independent advice, plus the best prices and fast delivery of the most appropriate tanking solutions for your project!