Waterproofing: systems, warning signs and warranties
Waterproofing systems providers list, warning signs of a bad contractor, and the advice to ask for a written warranty.
Systems and testing
Providers list common systems such as torch-on membranes and cementitious coatings, and one KL provider describes a 24-48 hour ponding test to check the finished work.
Warning signs to watch for
According to a Malaysian contractor guide, red flags include a quote by phone without a site inspection; per-point pricing where the count grows during the work; no SSM or CIDB registration; a refusal to put the warranty in writing; cash-only payment; and large upfront deposits.
Ask for a written warranty
According to a Malaysian contractor guide, ask for a written workmanship warranty that states the coverage period and remedies.
What providers publish
Indicative prices published on provider websites on the dates shown. They are not quotes.
Updated 4 Oct 2026