What is Roof and Tank Waterproofing?
Roof and tank waterproofing is the process of applying a protective, impermeable layer to your terrace and water storage units. This barrier prevents water from penetrating the surface, stopping leaks before they can cause significant damage. For roofs, it shields the building from rainwater. For tanks, it prevents water from leaking out and contaminants from seeping in. It's an essential maintenance step for the long-term health of your property.
Signs Your Roof Needs Waterproofing
Catching problems early can save you from costly repairs. Look for these common warning signs on your terrace.
Water Stains and Discoloration
Dark stains or discoloration on your ceilings and walls are clear indicators of a water leak. These often appear after heavy rain and are a sign that water is seeping through your roof slab.
Ponding Water
If you notice pools of water on your terrace 48 hours after it rains, it means your roof has poor drainage. This standing water puts constant pressure on the surface, eventually finding its way through weak spots. Effective terrace waterproofing is designed to prevent this.
Cracked or Bubbling Paint
Paint on interior ceilings or exterior walls that is cracking, bubbling, or peeling is often caused by moisture being trapped behind it. This is a tell-tale sign that water is getting into your structure from the roof.
Visible Roof Damage
Look for visible cracks, gaps, or damage on your roof’s surface. Weathering can cause concrete to crack, creating direct paths for water to enter.
Interior Mold and Mildew
A musty smell or visible mold and mildew growth inside your home, particularly on the top floor, strongly suggests a moisture problem originating from a roof leak.
Signs Your Water Tank Needs Waterproofing
A compromised water tank can lead to water wastage and health hazards. Here’s what to look for:
Cracks, Leakage, or Damage:
Any visible cracks or damp patches on the tank's exterior signal a leak.
Moisture, Dampness, or Mold:
Persistent dampness or mold growth on or around the tank indicates water is escaping.
Rust or Corrosion:
For metal tanks or components, rust is a sign of water damage and structural weakening.
Decreased Water Quality:
If your tap water becomes cloudy, discolored, or has an unusual taste, it could mean contaminants are entering through cracks in the tank.
Age of the Water Tank:
Older tanks, especially concrete ones, are more susceptible to developing cracks and leaks over time.
Ineffective Sealing of Joints and Connection:
Ineffectively sealed joints, such as inlet/outlet pipes and wall connections, can crack or wear out over time, allowing water to escape. Regular inspection and proper resealing with quality waterproofing materials help prevent leakage and maintain tank integrity.
Types of Roof Waterproofing
Several methods are available for waterproofing for terrace areas, each with its own advantages.
Acrylic Coatings
A popular choice, this liquid waterproof roof coating is applied like paint and dries to form a seamless, flexible, and UV-resistant membrane.
Polyurethane Coatings
Polyurethane is highly flexible and durable, making it excellent for sealing cracks and handling temperature fluctuations without breaking.
Bituminous Membranes
Also known as asphalt-based waterproofing, this involves applying layers of bitumen, often in the form of self-adhesive or torch-on sheets.
EPDM membranes
EPDM membranes are durable synthetic rubber sheets that offer excellent flexibility, UV resistance, and weather tolerance. They create a long-lasting, low-maintenance waterproof barrier ideal for large roofs and terraces.
Liquid Applied Membranes
This category includes advanced liquid roof waterproofing products that are applied to the surface and cure to form a seamless, rubber-like waterproof layer. They are excellent for complex roof shapes.
Cementitious Waterproofing
This method uses a cement-based mixture blended with additives to create a rigid, waterproof barrier. It is often used on concrete surfaces before tiling.
Types of Water Tank Waterproofing
Ensuring your water tank is safe and leak-free requires specific, non-toxic waterproofing methods.
Epoxy Coatings
Epoxy coatings create a hard, durable, and seamless finish that is resistant to chemicals and abrasion. Food-grade epoxies are available that are safe for storing potable water.
Cementitious Waterproofing
Specialized cementitious slurries can be applied to the interior of concrete tanks. They are effective at sealing pores in the concrete and are safe for drinking water once cured.
Polyurea Coatings
Polyurea is a fast-curing, highly flexible, and extremely durable coating. It creates a robust, seamless lining that is resistant to cracks and safe for potable water.
Bituminous Coatings
While used for waterproofing, it's crucial to ensure that any bituminous product used for potable water tanks is specifically rated as non-toxic and safe for drinking water.
Fibreglass Lining
Fibreglass lining involves reinforcing the interior surface of the tank with layers of fiberglass mat and resin. This creates a strong, rigid, and completely waterproof shell. It is highly resistant to corrosion, chemicals, and abrasion, making it suitable for both underground and overhead tanks. Once applied, the lining significantly extends the lifespan of the tank.
Terrace & Water Tank Waterproofing Cost
The cost of waterproofing varies based on the size of the area, the condition of the surface, the chosen method, and labor rates. While it requires an upfront investment, it is far more affordable than dealing with structural repairs, water damage, or health issues from contaminated water. Professional waterproofing should be seen as a necessary investment in your property's value and safety.
How Can Asian Paints Help You Waterproof Your Terrace & Tanks?
Asian Paints offers a scientific approach to waterproofing. Our trained experts use advanced tools to diagnose the source of the problem and recommend the right solution. With a range of high-performance roof waterproofing products like SmartCare Damp Proof and specialized coatings for tanks, we provide tailored systems for your needs. Choosing Asian Paints means getting a durable, long-lasting solution backed by a comprehensive warranty for complete peace of mind.
