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Waterproofing step by step.pdf
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- 2. Areas of Waterproofing Gardens Planterbox Terrace Garden Foundations & Retaining Walls External Areas Balcony, Roof Water bodies Swimming Pool Water tanks Internal Areas Toilets, Kitchens
- 3. Types of WaterProofing Liquid Waterproofing Membrane / Sheet Waterproofing Internal & External Polymer modified Cementitious membranes Polymer modified Bituminous membranes SBS Membrane (Styrene Butadiene Styrene) APP Membrane (Actactic Poly Propylene) Geotextile Membrane (Flagon)
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- 5. Precautions for waterproofing RCCMasonry Plaster Construction elements to be observed Relevant code – IS 13182:1991
- 6. RCC 1 Avoid Constructionjoints in waterproofing areas Avoid joints across Toilet, kitchens, balcony etc For construction joints of vertical elements use water stopper / swelling gaskets
- 7. RCC 2 RCC sunkenslabs to be monolithic in construction X
- 8. RCC 3 For waterproofareas ensure RCC has no honey combs, presence of foreign materials, tie rod holes
- 9. RCC 4 Ensure theRCC surface finish is desirable & suitable for waterproofing Surface to be made smooth during casting To avoid reworks such as surface grinding, plastering
- 10. RCC 5 Ensure serviceopenings are proper in place Openings & sleeves Spout Pipe Ensure for water retaining structures use Puddle flange for inlet & outlet pipes
- 11. Masonry 1 Solid blocksto be used till to a height of 100mm above FFL Solid Block Hollow Blocks FFL 100mm
- 12. Plaster 1 For wallsurfaces adjacent to shower area, damp proof coating or waterproof plaster shall be applied
- 13. Plaster 2 Ensure theembedded pipe & its connections, bends & joints are well tight & secured All drain connections for Floor traps, WC, Bidets, Bathtubs, Wash basin, shower trays etc. All supply inlet connections for Wash basins, shower, WC etc. Copper pipes for hot water shall be adequately insulated
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- 15. Liquid Waterproofing (Internal areas) (Cementitious / Bituminous Polymer modified membranes)
- 16. Installation – InternalWaterproofing Surface of waterproofing shall be dry & made smooth either by surface grinding or by thin layer of plastering Haunches shall be made around corners, sleeve openings
- 17. Installation – InternalWaterproofing Waterproof coating shall be laid in layers on the dried surface
- 18. Installation – InternalWaterproofing After 24 hrs of drying, the 2nd coat shall be applied in right angle to 1st layer
- 19. Installation – InternalWaterproofing After 24 hrs of 2nd coat, water may be filled & inspect the bottom surface, joints, around sleeves for any leakage
- 20. Sheet Waterproofing (External &foundation levels) ( SBS/APP/Flagon membranes)
- 21. Installation – ExternalWaterproofing Ensure the horizontal or vertical surface on which waterproofing need to be applied is sufficiently dry & clean Ensure on wall surfaces, holes for tie rods to be filled with cement grout, any extruding steel projections to be cut Ideal surface
- 25. Installation – ExternalWaterproofing Over the horizontal or vertical dry surface apply one coat of bituminous primer
- 26. Installation – ExternalWaterproofing 1st layer SBS bitumen membrane shall be laid over the surface by the flame torch Ensure the sheet joints are overlapped by 100mm
- 27. Installation – ExternalWaterproofing 2nd layer SBS bitumen membrane shall be laid in right angle to 1st layer Ensure the sheet joints are overlapped by 100mm
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- 29. Protection of Waterproofing INTERNALEXTERNAL 1 Polythene Sheets 2 Plastering 3 Screed 1 Protection Board 2 Flashings
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