Subhead 22.0: Water Proofing Treatment

Subhead 22.0: Water Proofing Treatment

This section covers the specifications for various types of waterproofing treatments in construction projects. Waterproofing is essential to prevent water ingress and protect structures from damage caused by moisture. Here is a detailed breakdown of the content typically covered under this subhead:

22.1 General Specifications

• Scope: Waterproofing treatments for roofs, basements, water tanks, terraces, bathrooms, and other areas susceptible to water ingress.
• Materials: Specifications for materials used in waterproofing, including membranes, coatings, sealants, and additives.
• Workmanship: Standards for surface preparation, application, and curing to ensure effective and durable waterproofing.

22.2 Bituminous Waterproofing

• Materials: Bitumen-based products such as bitumen felts, mastic asphalt, and bituminous coatings.
• Application: Methods for applying bituminous waterproofing, including torch-on membranes, cold-applied coatings, and hot-applied mastic asphalt.
• Surface Preparation: Cleaning and priming surfaces to ensure proper adhesion of bituminous materials.

22.3 Polymer-Modified Waterproofing

• Materials: Polymer-modified bitumen, acrylic-based coatings, and other polymer-based products.
• Application: Methods for applying polymer-modified waterproofing, including brush, roller, or spray application.
• Surface Preparation: Ensuring surfaces are clean, dry, and primed for optimal adhesion.

22.4 Cementitious Waterproofing

• Materials: Cement-based products mixed with waterproofing additives.
• Application: Methods for applying cementitious waterproofing, including brush, trowel, or spray application.
• Surface Preparation: Wetting surfaces before application and ensuring a uniform, smooth finish.

22.5 Liquid Membrane Waterproofing

• Materials: Liquid-applied membranes, including polyurethane, acrylic, and silicone-based products.
• Application: Methods for applying liquid membranes, including brush, roller, or spray application.
• Surface Preparation: Ensuring surfaces are clean, dry, and primed for optimal adhesion.

22.6 Sheet Membrane Waterproofing

• Materials: Preformed sheet membranes made from materials such as PVC, EPDM, and TPO.
• Application: Methods for applying sheet membranes, including adhesion, mechanical fastening, or loose laying with ballast.
• Surface Preparation: Ensuring surfaces are clean and smooth for proper membrane adhesion or placement.

22.7 Crystalline Waterproofing

• Materials: Crystalline products that react with water and concrete to form insoluble crystals.
• Application: Methods for applying crystalline waterproofing, including brush or spray application on wet concrete surfaces.
• Surface Preparation: Ensuring surfaces are clean and moist for optimal crystal formation.

22.8 Integral Waterproofing

• Materials: Waterproofing admixtures added to concrete mix.
• Application: Mixing waterproofing admixtures into concrete at the batching plant or on-site.
• Surface Preparation: Ensuring proper mixing and curing of concrete for effective waterproofing.

Examples:

1. Bituminous Waterproofing for Roofs:

   • Surface Preparation: Clean the roof surface, remove debris, and apply a bitumen primer.
   • Application: Lay bitumen felt rolls with torch-on application, ensuring overlapping joints for watertightness.
   • Finishing: Apply a protective coating or reflective paint to extend the lifespan of the bituminous layer.

2. Polymer-Modified Waterproofing for Bathrooms:

   • Surface Preparation: Clean and dry the bathroom floor and walls, and apply a suitable primer.
   • Application: Apply a polymer-modified waterproofing coating with a brush or roller, ensuring even coverage.
   • Curing: Allow the coating to cure as per manufacturer instructions before installing tiles or other finishes.

3. Cementitious Waterproofing for Water Tanks:

   • Surface Preparation: Wet the concrete surface of the water tank and ensure it is free of loose particles.
   • Application: Apply a cementitious waterproofing slurry with a brush or trowel, covering all surfaces evenly.
   • Curing: Keep the treated surfaces moist for the specified curing period to ensure proper bonding and effectiveness.

4. Liquid Membrane Waterproofing for Terraces:

   • Surface Preparation: Clean and dry the terrace surface, and apply a suitable primer.
   • Application: Apply a liquid membrane waterproofing product with a roller or sprayer, ensuring even coverage.
   • Finishing: Apply a protective topcoat or reflective paint to enhance durability and reflectivity.

5. Sheet Membrane Waterproofing for Basements:

   • Surface Preparation: Clean and smooth the basement walls and floor.
   • Application: Adhere or mechanically fasten sheet membranes to the surfaces, ensuring overlapping joints for watertightness.
   • Protection: Install protective boards or drainage mats over the membrane before backfilling.

Sat Aug 3, 2024