Case Study: Terrace Waterproofing in Whitefield, Bangalore

The Problem

A 12th-floor apartment in a Prestige Shantiniketan tower had been leaking into the flat below every monsoon for 3 consecutive years. Two previous waterproofing jobs — both from general contractors — had failed within one monsoon season each. The RWA had spent ₹90,000 total on failed attempts before calling LoklFix.

Our Diagnosis

Our inspection found that both previous contractors had applied waterproofing coating on top of the original failed system without hacking it off. Water was entering through expansion joints between terrace sections — a common issue in large apartment buildings where thermal movement creates movement at joint lines. No amount of surface coating fixes a joint failure.

The Solution

Full hack of existing failed waterproofing layer (2 days of preparation work). PU sealant injection into all expansion joints (Fosroc Thioflex). Two-coat Fosroc Brushbond TG system over the full 1,200 sqft terrace surface, including 300mm treatment around all drain surrounds and full parapet wall inner face treatment.

The Result

What This Job Cost — And Why

The total cost of ₹52,000 for this job breaks down as: 35–40% materials, 25–30% surface preparation and labour, 10–15% mobilisation and equipment. This is higher than the cheapest quotes the customer received — but it produced a permanent fix where two previous cheaper jobs had failed completely.

The framework for evaluating any waterproofing quote isn't price per sqft. It's: What is the contractor's diagnosis of the root cause? What preparation will they do? What material and how many coats? What does the written warranty cover? Get those four answers in writing before comparing quotes.