How to Waterproof Toilets & Bathroom in 14 Steps?

Answer 1

Steps for Waterproofing Bathroom/Toilet:

Step 1. Remove the existing W.C. pan tiles etc and break open the exciting brick bat coba and I.P.S toilet/bathroom and reach the bare slab.

Step 2. Moisten the crack and apply a Bonding Coat of POLYALK EP and cement slurry in the ratio of 1:0.5 in the groove

Step 3. Within 30 minutes of application of Bonding Coat. Prepare and apply by hand POLYMER MODIFIED MORTAR using 2 Kg POLYALK EP, 5 Kg cement, 15 Kg graded quartz sand. DO NOT ADD ANY WATER TO THIS MORTAR. This has to be a wet-on application.

Step 4. Air Cure the surface for 48 Hrs

Step 5. Sprinkle Water for 3-4 days

Step 6. Clean the slab of all dust, dirt oil, grease, grime, etc.

Step 7. Drill holes in the slab and fix nipples and inject grout by mixing 5% of POLYALK EP and POLYTANCRETE NGT@150mls both per bag of cement. Add water as a minimum for flowability. After grouting is completed cut and seal the nipples by Polymer Modified Mortar.

Step 8. Prepare a slurry using 1 Kg of POLYALK WP and 0.25 Kg of cement and apply by brush on the bare slab. Mixing should be done using a low-speed stirrer to form a lump-free consistency. NO WATER TO BE ADDED PREPARE AS MUCH SLURRY AS CAN BE USED IN 30 MINUTES.

Step 9. After 24 hours, apply a second coat of similar slurry of the same proportion.

Step 10. Air Cure the surface for 48 Hrs.

Step 11. Cure the coating with damp gunny bags for 4-5 days.

Step 12. Apply the third coat of slurry using 1 Kg of POLYALK WP and 0.25 Kg of Cement and apply by brush on the second coat. NO WATER IS TO BE ADDED.

Step 13. While this coat is wet and tacky lay the cement mortar for providing brick bat coba. This has to be a wet-on-wet application. Add SUNPLEX (330 gms pouch) per 50 Kgs bag of cement in the mortar mix for brick bat coba.

Step 14. Proceed with providing conventional brick bat coba. I.P.S over the slab and fix tiles/pan as per requirement. Add SUNPLEX (330 gms) pouch in the cement mortar mix of the I.P.S to minimize the shrinkage cracks on the IPS.