10 Simple Steps for a Fully Waterproof Bathroom at Home!

Tired of dealing with bathroom leaks and damp walls? A waterproof bathroom is essential to protect your home from water damage, mould, and costly repairs. Whether you’re building a new bathroom or fixing an old one, ensuring proper waterproofing can save you from future headaches.

Water can easily seep through tiles, grout, and even concrete, causing long-term structural issues. That’s why using the right waterproofing methods and materials is crucial to keep your bathroom dry and durable for years to come.

Want to know how to do bathroom waterproofing the right way? Keep reading to learn 10 simple steps to achieve a fully waterproof bathroom!

Sunanda Global’s Waterproofing Solution: POLYALK WP

At Sunanda Global, we recommend POLYALK WP, one of our best high-performance waterproofing coatings, that provides long-lasting protection for bathrooms.

Key Features of POLYALK WP

• Easily mixes with cement, forming an impermeable co-matrix film.
• Alkaline and fully compatible with concrete.
• Prevents carbonation, keeping surfaces structurally sound.
• Can be applied in moist and damp conditions, perfect for monsoons.
• Suitable for underground and overhead water tanks right after emptying.
• Offers high flexural strength and exceptional adhesion to surfaces.

10 Simple Steps to Fully Waterproof Bathrooms

Follow these practical steps to ensure your bathroom stays dry, leak-free, and well-protected using POLYALK WP, a reliable waterproofing solution.

1. Surface Preparation is Key

Proper surface preparation is crucial for effective waterproofing. Start by scrubbing and cleaning the surface to remove dirt, paint, laitance, loose flakes, and any foreign particles. Use a vacuum cleaner, high-pressure water jet, wet sandblasting, or wire brushing to ensure a clean and open-pore texture on the concrete surface.

2. Repair Any Cracks or Damaged Areas

Inspect the walls and floors for cracks, honeycombing, or other damage. Fill larger cracks with a suitable repair mortar and use POLYFILL AR, our elastomeric acrylic crack filler, to treat hairline cracks in plaster or mortar. This step helps prevent water from seeping through weak spots.

3. Remove Curing Compounds and Sealers

Before applying the waterproofing coat, make sure to remove any curing compounds or sealers from the concrete surface. This ensures proper bonding of the waterproofing layer and enhances the longevity of the coating.

4. Pre-wet the Surface

Twenty-four hours before the waterproofing process, moisten the bathroom surface by spraying water. Keeping the surface damp (not wet) helps the waterproofing slurry adhere better to the substrate.

5. Prepare the POLYALK WP Waterproofing Mix

Mix 1 part of POLYALK WP with 1 to 1.25 parts of fresh white or grey cement. Stir continuously by hand to achieve a smooth, lump-free consistency. Keep stirring the mixture while applying to maintain uniformity.

6. Apply the First Coat of Waterproofing

Using a brush or roller, apply the first coat of the POLYALK WP slurry to the damp bathroom surface. Ensure even coverage, reaching corners, joints, and pipe fittings to prevent any weak spots.

7. Apply Additional Coats for Better Protection

Allow the first coat to dry for 24 hours before applying the second coat at right angles to the first. For maximum durability, apply a third coat if necessary, maintaining the same time interval between layers.

8. Allow Proper Setting Time

Once all coats have been applied, let the waterproofing layers set for 24-48 hours. Avoid exposing the coated surface to heavy moisture or foot traffic during this period to ensure proper curing.

9. Curing the Coated Surface

Cure the coating for 2-3 days by sprinkling water on vertical surfaces (like bathroom walls) three times a day. For horizontal surfaces (such as floors), cover them with moist gunny bags to retain moisture and aid the curing process.

10. Provide a Protective Layer

For flat bathroom surfaces, apply a protective screed or plaster over the POLYALK WP coating to safeguard it from mechanical damage. For external bathroom walls, an additional protective coating of our SUNEXT-8, a heat-insulating, anti-carbonation exterior coating, is recommended to extend the lifespan of the waterproofing system.

Why Choose Sunanda Global for Your Waterproofing Needs?

At Sunanda Global, we care about the safety and well-being of homeowners and their families. Our commitment to delivering top-quality waterproofing solutions ensures your bathroom stays protected from leaks and moisture-related issues. With our extensive experience in the industry, we’ve earned the reputation as the best waterproofing company trusted by homeowners and professionals alike.

Looking for reliable waterproofing contractors in Mumbai or other major cities in India? Contact Sunanda Global today for expert guidance and superior waterproofing products to safeguard your home.