Waterproofing systems
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Criterion
Cavity drained
Multi-coat render
Cementitious coating
Defence against hydrostatic pressure
Good if drainage maintained. Cavity thwarts hydrostatic pressure
Good
Average. Improved on positive side
Ease of repair
Repair possible during and after installation
Defects can be located but reliable repair not easily achieved
Good
Requirement for sound substrate
Good fixings required at specific spacings
Sound substrate required
Base render coat needed if substrate unreliable....
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