How to waterproof toilets and bathroom in 14 Steps

How to waterproof the toilet & bathroom?

What are the steps for waterproofing the bathroom/Toilet?

What is the Method for Waterproofing Bathroom/Toilet?

What is the product used for waterproofing the bathroom/Toilet?

Steps for Waterproofing Bathroom/Toilet:

Step 1. Remove the existing W.C. pan tiles, 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 the Bonding Coat. Prepare and apply by hand POLYMER MODIFIED MORTAR using 2 Kg POLYALK EP, 5 Kg cement, and 15 Kg graded quartz sand. Do not add any water to this mortar; and 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 with 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 is to be added; prepare as much slurry as possible in 30 minutes.

Step 9. After 24 hours, apply a second coat of a 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 slurry coat 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 to provide brick bat coba and this has to be a wet-on-wet application. Add SUNPLEX (330 gms pouch) per 50 kg bag of cement in the mortar mix for brick bat coba.

Step 14. Proceed with providing conventional brick bat coba and 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 shrinkage cracks. If additional finishing is required for smoother walls or surfaces, gypsum plaster can be applied over I.P.S. for a polished, crack-free finish.

Ishita Manjrekar