Waterproofing in Tsz Wan Shan

Yes — reputable structural waterproofing comes with an insurance-backed guarantee so the cover survives if the contractor ceases trading. Ask whether the guarantee is company-backed or independently insured, because a company-only warranty is worth little if they close.

Damp proofing resists moisture and rising damp (like a damp-proof course in a wall); waterproofing resists liquid water under pressure, as in a basement below the water table. Below-ground and wet-area work needs true waterproofing, not just a damp treatment.

Small sealant jobs on a minor damp patch are DIY-able, but below-ground waterproofing against groundwater pressure is specialist work — get it wrong and you trap water or flood the space. Full basement systems should be designed and installed by a qualified specialist.

A common trap is a 'free survey' that always diagnoses rising damp and sells a chemical damp-proof course, when the real cause is condensation, a leaking gutter or bridged damp course. Get an independent, qualified diagnosis before paying for injected chemicals.

In Tsz Wan Shan, look for a specialist who diagnoses the water source before quoting, proposes a system matched to it, offers an insurance-backed guarantee, and shows relevant qualifications. Avoid one-size-fits-all chemical-injection sales pitches.

A bathroom or small sealant job typically runs HKD 3,000-15,000, roof or membrane systems HKD 12,000-55,000, and full structural waterproofing HKD 40,000-160,000.