Brick Bat Coba Treatment

Traditional slope-forming waterproofing treatment for terraces and roof slabs.

  1. Surface Preparation: The Concrete Surface Is Thoroughly Cleaned To Remove Dirt, Debris, And Loose Materials. If The Concrete Is Still “Green” (Freshly Cast), It Is Roughened By Scraping; Otherwise, It Must Be Hacked Or Wire-Brushed To Ensure Proper Adhesion.
  2. Crack Treatment: Any Existing Structural Or Non-Structural Cracks Are Treated With Polymer-Modified Cement Or Rich Cement Mortar Before Starting The Main Layers.
  3. Primer/Slurry Coat: A Cement Slurry—Often Mixed With A Waterproofing Compound—Is Applied As A Bonding Agent. A Common Specification Is 75 Kg Of Cement Per Square Metre.
  4. Base Coat Application: Immediately After The Slurry, A 20 Mm To 25 Mm ThickLayer Of Cement Mortar (Typically A 1:4 Or 1:5 Ratio) Is Applied While The Slurry Is Still Green.

  1. Laying Brick Bats: Well-Burnt Brick Bats (Sized 25 Mm To 115 Mm) That Have Been Soaked In Water For At Least 6 HoursAre Laid Over The Base Coat. They Are Arranged To Create The Necessary Slope For Water Drainage (E.G., 70 Mm Thick Near Pipes And 150 Mm At The Ridge).
  2. Grout And Joint Filling: Gaps Of 15 Mm To 25 MmBetween The Bats Are Filled With A Cement Mortar Mix (1:4 Or 1:5), Compacted To Eliminate Air Pockets.
  3. Final Protective Layer: Once The Mortar Has Set, A Finishing 20 Mm Plaster Coat(1:4 Ratio) Mixed With Waterproofing Chemicals Is Applied. This Is Often Marked With A 300 Mm X 300 Mm Grid Pattern To Help Manage Thermal Expansion And Contraction.
  4. Curing: The Entire Surface Is Flooded With Water (Ponding) Or Kept Moist For A Minimum Of 7 To 14 DaysTo Ensure Maximum Strength.

Scroll to Top