New build basements will often be designed and built from well graded and in many cases ?waterproof concrete?, concrete block or hindrances with concrete infill. A well designed and built structure will generally form the key resistance to water ingress as your concrete is too dense for water to feed. However we must always be mindful that where you?ll find construction joints there is risk of failure regardless of whether waterbars, hydrophilic/hydrophobic strips are well mounted.
Building a strong basement structure to the primary resistance against water a very good idea but where there are construction joints we?ve got to expect that water ingress could occur eventually. Therefore a more reliable form of secondary waterproofing aside from the structure itself is a cavity drain membrane system or Type H basement waterproofing.
Before the recent revision in the BS8102: 2009 the previous code involving practice BS8102: 1990 stated that Type C way of construction and waterproofing was the nearly all ?trouble free and effective?. Now your BS8102 says that Type A, B and C together is the most efficient which probably goes without saying but as being a stand alone basement waterproofing system type C cavity drain membrane remains to be more reliable that the others.
Source: http://nevisislandhouse.com/basements-waterproofing-new-build/
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