Brickbat Waterproofing

The Problem

Flat terraces without proper slope create water stagnation, leading to:

• Water ponding and slow drainage
• Increased hydrostatic pressure on waterproofing layer
• Accelerated membrane degradation
• Seepage through expansion joints and cracks
• Structural damage from prolonged water contact

Scientific Method

Brickbat waterproofing (also called brick-on-edge or China mosaic method) involves:

1. Base Waterproofing: Application of bitumen/chemical membrane on cleaned terrace surface
2. Slope Creation: Laying broken brick pieces (brickbats) in graded slope towards drainage points
3. Mortar Filling: Lime-cement mortar filling between brickbats for structural integrity
4. Protective Layer: Final cement plaster or tile finish over the brickbat layer

This method creates a sacrificial protective layer that shields the waterproofing membrane from direct sunlight, temperature fluctuations, and physical damage, significantly extending its service life.

Materials Used

Application Areas

• Flat Terraces: Residential and commercial building roofs
• Accessible Roofs: Roofs with regular foot traffic
• Parking Decks: Areas requiring load-bearing waterproofing
• Large Surface Areas: Cost-effective for expansive terraces

Benefits