External Wall Waterproofing

External Wall Waterproofing

Elastic waterproof membranes and coatings designed for external wall and window perimeter applications. These flexible coatings bridge cracks and prevent rainwater penetration through building facades, a common issue in Hong Kong's high-rise buildings.

Key Features

• Crack bridging - Elastic membrane bridges existing and future cracks
• Weather resistant - Withstands wind-driven rain, UV and temperature cycles
• Breathable options - Allows water vapour to escape while blocking liquid water
• Decorative finishes - Available in various colours for aesthetic facade treatment

Applications

• External wall facades
• Window and door perimeter sealing
• Concrete panel joints
• Balcony and parapet walls
• Building envelope protection

Available Brands

• Sika - Sikalastic, SikaGard series
• Alchimica - Hyperdesmo range

FAQ

Why do external walls leak?

Common causes include cracked render, poor joint details around windows, porous concrete and failed sealants. A flexible waterproof coating addresses these issues by creating a seamless, crack-bridging barrier over the entire surface.

Can the waterproofing be painted over?

Many external wall waterproofing products are available in colours and serve as the final finish. If painting is required, ensure the paint is compatible with the waterproofing membrane.