Water Proofing Cost | Waterproofing Cost Per Sqft

Water proofing cost is important before starting waterproofing. Waterproofing is a construction technique used to protect buildings from water and moisture damage. It involves applying materials and methods to create a barrier that prevents water penetration.

This process is crucial in areas like roofs, basements, terraces, and bathrooms to prevent leaks and structural deterioration. Proper waterproofing ensures a durable and safe building environment, free from water-related issues.

Water Proofing Cost per Sqft

Cost of waterproofing based on surface area changes. Shown below is the waterproofing treatment with their respective prices.

For external walls with paint surfaces, the recommended waterproofing treatment involves using WPC in combination with Raincoat Classic. The water proofing cost for this application ranges from Rs. 27 to Rs. 33 per square foot.

For external walls with concrete surfaces, a more comprehensive waterproofing approach is suggested. It includes using Primeseal, WPC, and Raincoat Classic. The water proofing cost for this multi-layered application varies from Rs. 28 to Rs. 35 per square foot.

To waterproof terraces with concrete surfaces, Roofseal Classic is recommended. This specialized product offers effective protection against water seepage and is priced at Rs. 55 per square foot.

For terraces with tile surfaces, a combination of Primeseal Plus and Roofseal Classic is advised. This combination provides enhanced waterproofing properties and costs Rs. 60 per square foot.

Terrace and Bathroom Waterproofing Cost

Cost of waterproofing for terrace and bathroom is different. Below shown is the cost of waterproofing for terrace and bathroom.

For surfaces with a concrete terrace area of up to 3000 square feet, the recommended product for waterproofing is “Dr Fixit Roofseal Classic” priced at Rs. 55 per square foot. Alternatively, you may choose “Fosroc Nitoproof 600” at Rs. 60 per square foot or “Asian Paints SmartCare” at Rs. 65 per square foot.

For terrace areas ranging from 3000 to 5000 square feet, the suggested product remains “Dr Fixit Roofseal Classic” at a rate of Rs. 82 per square foot. Other options include “Asian Paints SmartCare” at Rs. 75 per square foot or “Pidilite Dr. Fixit LW+” at Rs. 80 per square foot.

Bathrooms with an area of up to 1000 square feet can be waterproofed using “Dr Fixit Pidifin 2K” at Rs. 45 per square foot. If desired, you can consider “Pidilite Dr. Fixit Newcoat Ezee” at Rs. 50 per square foot or “Fosroc Nitobond SBR” at Rs. 52 per square foot.

For larger bathrooms exceeding 1000 square feet, the recommended product is “Dr Fixit Fastflex” priced at Rs. 57 per square foot. Alternatively, you may opt for “Sika SikaTop Seal 107” at Rs. 55 per square foot or “Asian Paints SmartCare” at Rs. 60 per square foot.

Water Proofing Treatment Cost

Cost of waterproofing treatment with their respective price is shown in the table below.

Epoxy Grouting: Epoxy grouting is a type of grouting technique used to fill gaps, voids, or cracks in various surfaces using epoxy resin. This method provides a strong, durable, and water-resistant seal. It is commonly used for tile joints, concrete repairs, and to reinforce structures. The price for epoxy grouting is Rs. 45 per square foot, which means that the cost will be calculated based on the total area that requires epoxy grouting.

Cement Grouting: Cement grouting is a traditional method of filling gaps or voids in concrete structures using a cement-based grout mixture. It is commonly used to repair cracks in concrete surfaces, seal joints, and stabilize the foundation. The price for cement grouting is Rs. 30 per square foot, which will be applied to the total area that needs cement grouting.

PU Sealant: PU (Polyurethane) sealant is a type of sealant that provides excellent flexibility, adhesion, and resistance to water and weathering. It is commonly used to seal joints and gaps in various surfaces, including windows, doors, and concrete structures. The price for PU sealant is Rs. 110 per square foot, which will be calculated based on the total length or area of joints that require sealing.

Crack Filling: Crack filling involves filling and sealing cracks in walls, floors, or concrete structures to prevent further water penetration and structural damage. This service helps maintain the integrity of the building and prevents moisture-related issues. The price for crack filling is Rs. 65 per square foot, which will be based on the total length or area of cracks that need to be filled.

Cement Injection Grouting: Cement injection grouting is a specialized technique used to repair and strengthen concrete structures by injecting cement-based grout into voids, cracks, or honeycombs. It helps restore structural integrity and prevent water leakage. The price for cement injection grouting is Rs. 700 per nozzle, and the cost will depend on the number of injection points or nozzles required for the grouting work.

PU Injection Grouting: PU injection grouting is a method used to fill voids or gaps in concrete structures using Polyurethane-based grout. It provides excellent expansion properties and is particularly effective for water-stopping and leak-sealing applications. The price for PU injection grouting is Rs. 2400 per nozzle, and the cost will be based on the number of injection points or nozzles needed for the grouting work.

Waterproofing Cost for Different Types

Brick Bat Coba is a traditional and popular waterproofing technique used for terraces and roofs. It involves the application of a mortar mix with a layer of broken bricks or tiles. The cost for Brick Bat Coba waterproofing on terraces and roofs is ₹85 per square foot.

APP (Atactic Polypropylene) Waterproofing Membrane is a modified bitumen-based membrane commonly used on terraces and roofs. It provides excellent water resistance and durability. The cost for APP Waterproofing Membrane application on terraces and roofs is ₹65 per square foot.

Liquid Waterproofing Membrane is a fluid-applied coating that forms a seamless waterproof layer. It is used for both basement and terrace/roof waterproofing applications. The cost for Liquid Waterproofing Membrane is ₹55 per square foot for both basement and terrace/roof applications.

Guniting Waterproofing involves spraying a mixture of cement, sand, and water on the surface to create a waterproof layer. It is commonly used for basement waterproofing. The cost for Guniting Waterproofing in basements is ₹75 per square foot.

Bituminous Coating Waterproofing is a surface-applied waterproofing method that involves applying a bituminous coating. It provides good water resistance for terrace and roof surfaces. The cost for Bituminous Coating Waterproofing on terraces and roofs is ₹25 per square foot.

Self-Adhesive Waterproofing Membrane is a pre-applied membrane with a self-adhesive layer for easy installation. It is commonly used for basement waterproofing. The cost for Self-Adhesive Waterproofing Membrane in basements is ₹150 per square foot.

Injection Grouting Waterproofing involves injecting grout material into cracks and voids to seal and waterproof the structure. It is commonly used for basement waterproofing. The cost for Injection Grouting Waterproofing in basements is ₹75 per square foot.

Polyurethane Liquid Membrane is a liquid-applied coating that provides excellent flexibility and water resistance. It is commonly used for terrace and roof waterproofing. The cost for Polyurethane Liquid Membrane on terraces and roofs is ₹45 per square foot.

Polymer Modified Cementitious Waterproofing involves applying a cement-based mixture with added polymers for enhanced water resistance. It is used for both basement and terrace/roof waterproofing applications. The cost for Polymer Modified Cementitious Waterproofing is ₹35 per square foot for both basement and terrace/roof applications.

Kota Stone Waterproofing involves using Kota stone and sealants to provide a waterproof layer. It is commonly used for basement waterproofing. The cost for Kota Stone Waterproofing in basements is ₹90 per square foot.

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Types of Waterproofing

There are various types of waterproofing methods and materials used to protect buildings and structures from water penetration. Each type of waterproofing has its specific advantages and is suitable for different applications. Here are some common types of waterproofing:

1. Liquid Waterproofing Membrane:
   • Liquid waterproofing membranes are applied as liquid coatings that form a seamless barrier against water. They are commonly used on roofs, balconies, and terraces.
   • Advantages: Easy to apply, can be used on irregular surfaces, provides a continuous and flexible waterproofing layer.
2. Cementitious Waterproofing:
   • Cementitious waterproofing involves applying cement-based coatings or products to the surface. It is commonly used for basements, concrete structures, and water tanks.
   • Advantages: Good adhesion to concrete, durable, provides resistance to hydrostatic pressure.
3. Bituminous Waterproofing:
   • Bituminous coatings use bitumen-based materials, such as asphalt or coal tar, to provide water resistance. They are often used on roofs, foundation walls, and below-grade surfaces.
   • Advantages: Excellent waterproofing properties, resistant to UV radiation, and can accommodate structural movement.
4. Polyurethane Waterproofing:
   • Polyurethane waterproofing provides a flexible and durable layer that can be used on various surfaces, including roofs, balconies, bathrooms, and concrete structures.
   • Advantages: Excellent flexibility, crack-bridging properties, resistant to weathering and UV radiation.
5. Sheet Membrane Waterproofing:
   • Sheet membrane waterproofing involves using premanufactured membranes made of materials like PVC, EPDM, or bitumen. They are typically applied on flat roofs and foundation walls.
   • Advantages: Easy to install, provides a continuous waterproofing layer, suitable for large surface areas.
6. Bentonite Waterproofing:
   • Bentonite waterproofing uses a clay-based material that swells when in contact with water, forming a dense barrier. It is often used in below-grade applications.
   • Advantages: Self-sealing properties, good for foundation walls and below-grade waterproofing.
7. Acrylic Waterproof Coating:
   • Acrylic waterproof coatings are water-based and used on a variety of surfaces like roofs, walls, and decks.
   • Advantages: Environmentally friendly, easy to apply, and provides a protective coating against water.

It’s essential to choose the appropriate type of waterproofing based on the specific requirements, the surface to be treated, and the environmental conditions of the area. Proper waterproofing helps protect structures from water damage, extending their lifespan and ensuring a healthy and safe living or working environment.

Equipment Used in Waterproofing

Waterproofing involves the use of various equipment and tools to properly apply waterproofing materials and ensure effective protection against water penetration.

The specific equipment used may vary depending on the type of waterproofing method, the surface being treated, and the scale of the project. Here are some common equipment used in waterproofing:

1. Sprayers and Applicators:
   • Airless sprayers: Used to apply liquid waterproofing membranes, coatings, and sealants to large surface areas quickly and evenly.
   • Roller applicators: Used to apply liquid waterproofing materials to walls, floors, or other surfaces with precision and control.
2. Trowels and Floats:
   • Margin trowels: Used for applying cementitious waterproofing materials in small and tight spaces, such as corners and edges.
   • Finishing floats: Used to achieve a smooth and even surface finish when applying cementitious waterproofing materials.
3. Brushes and Brooms:
   • Stiff bristle brushes: Used to clean and prepare the surface before applying waterproofing materials.
   • Soft bristle brushes: Used to apply liquid waterproofing materials on smaller surfaces or in areas where sprayers may not be suitable.
   • Brooms: Used for cleaning and removing debris from the surface before waterproofing.
4. Caulking Guns:
   • Used to apply sealants or caulk to seal gaps, joints, and cracks in the building envelope.
5. Waterproofing Membrane Rollers:
   • Used to apply adhesive and ensure proper adhesion of waterproofing membranes.
6. Heat Guns:
   • Used in torch-applied bituminous waterproofing methods to activate adhesive layers and create a secure bond.
7. Safety Equipment:
   • Personal protective equipment (PPE) such as gloves, goggles, masks, and boots to protect workers during the application of waterproofing materials.
8. Power Mixers:
   • Used to prepare cementitious waterproofing mixes, ensuring proper mixing and consistency.
9. Moisture Meters:
   • Used to assess the moisture content of the surface before waterproofing to ensure proper adhesion and effectiveness.

It’s important to use the appropriate equipment and tools for each waterproofing method to achieve the best results. Professional waterproofing contractors have access to specialized equipment and expertise to ensure the proper application of waterproofing materials for effective water protection.

Chemicals Used For Waterproofing

Various chemicals are used for waterproofing, each designed for specific applications and types of surfaces. These chemicals create a protective barrier that prevents water from penetrating the surface and causing damage. Here are some common chemicals used for waterproofing:

1. Acrylic Polymer-based Waterproofing Coatings:
   • Acrylic polymers are used to create flexible and durable waterproof coatings that adhere well to various surfaces like concrete, masonry, and metal. They are often used on roofs, terraces, balconies, and exterior walls.
2. Cementitious Waterproofing Compounds:
   • Cement-based waterproofing compounds are applied as a slurry or mix to concrete surfaces and structures. They penetrate the concrete pores, forming a barrier against water.
3. Bitumen-based Waterproofing:
   • Bitumen or asphalt-based materials are commonly used for waterproofing roofs, foundations, and below-grade structures. They provide excellent water resistance.
4. Polyurethane Waterproofing:
   • Polyurethane waterproofing coatings are flexible and suitable for various surfaces like roofs, terraces, balconies, and bathrooms. They can withstand movement and are resistant to weathering.
5. Bentonite Waterproofing:
   • Bentonite clay is used for creating bentonite waterproofing systems. When hydrated, bentonite swells to form a dense and impermeable barrier, often used for below-grade applications.
6. Silicone Waterproofing Sealants:
   • Silicone-based sealants are used to seal joints, gaps, and cracks on various surfaces, providing excellent water resistance and durability.
7. Liquid Membrane Waterproofing:
   • Liquid membrane coatings are made of various synthetic materials and applied as a liquid. They cure to form a seamless and flexible waterproofing layer.
8. PVC Waterproofing Membranes:
   • PVC (Polyvinyl Chloride) membranes are used for waterproofing roofs, decks, and terraces. They are durable and resistant to UV radiation.
9. EPDM Waterproofing Membranes:
   • EPDM (Ethylene Propylene Diene Monomer) membranes are synthetic rubber membranes used for roofs and waterproofing applications.
10. Silane and Siloxane Sealers:
    • Silane and siloxane sealers are penetrating sealers that chemically react with the surface to create a water-repellent barrier.

The choice of the waterproofing chemical depends on factors such as the surface to be treated, the application area, the environmental conditions, and the specific waterproofing requirements of the project.

Professional waterproofing contractors can recommend the most suitable chemicals for your specific needs and ensure effective water protection for your building or structure.

There are several reputable brands that offer a wide range of waterproofing chemicals and products. Here are some well-known brands known for their quality waterproofing solutions:

1. Dr. Fixit (by Pidilite Industries Ltd.): Dr. Fixit is a popular brand known for its comprehensive range of waterproofing solutions, including coatings, sealants, and membranes.
2. Asian Paints SmartCare: Asian Paints SmartCare offers a variety of waterproofing products such as sealants, coatings, and cementitious waterproofing compounds.
3. Fosroc: Fosroc is a global brand that provides high-performance waterproofing solutions, including admixtures, coatings, and membranes.
4. Sika: Sika is a renowned brand offering a wide range of construction chemicals, including waterproofing products like coatings, sealants, and membranes.
5. BASF MasterSeal: BASF offers MasterSeal waterproofing solutions that include sealants, coatings, and waterproofing membranes.
6. Mapei: Mapei is a leading manufacturer of construction chemicals, including waterproofing products like liquid membranes and sealants.
7. CICO Technologies: CICO Technologies specializes in waterproofing solutions, ranging from cementitious coatings to sealants.
8. Pidilite Roff: Pidilite Roff offers waterproofing chemicals, sealants, and coatings for various applications.
9. Chembond: Chembond provides a range of waterproofing solutions, including cementitious coatings, sealants, and membranes.
10. Ardex Endura: Ardex Endura is known for its waterproofing products, including cement-based coatings and sealants.

It’s important to note that the availability of these brands and their specific product offerings may vary by region. When choosing a waterproofing chemical brand, it’s essential to consider the project’s requirements, the surface to be treated, and consult with professionals to determine the most suitable product for your needs.

Rate Analysis of Waterproofing

Rate analysis for waterproofing involves a detailed breakdown of the various costs associated with the waterproofing work in a construction project.

It helps estimate the total cost of the waterproofing work and enables effective budgeting and cost control. Here’s how a rate analysis for waterproofing is typically done:

1. Quantity Survey:
   • Measure and quantify the areas that require waterproofing, such as roofs, walls, balconies, terraces, and basements. Measurements are taken in square feet or square meters.
2. Material Costs:
   • Determine the cost of waterproofing materials needed for the project, including coatings, sealants, membranes, adhesives, and any other specific chemicals required.
3. Labor Costs:
   • Calculate the labor cost based on the scope and complexity of the waterproofing work. Labor costs depend on the number of workers required, the duration of the project, and the prevailing labor rates.
4. Equipment and Tools:
   • Consider the cost of any specialized equipment and tools needed for the waterproofing work, such as sprayers, rollers, trowels, and safety equipment.
5. Surface Preparation:
   • Account for the cost of surface preparation, which may include cleaning, repairing cracks and defects, and ensuring the surface is ready for waterproofing.
6. Overhead Costs:
   • Include overhead costs, such as transportation, administrative expenses, and insurance.
7. Contingency:
   • Add a contingency amount to account for unforeseen expenses or variations in the project.
8. Profit Margin:
   • Include a profit margin, which is typically a percentage of the total cost, to account for the contractor’s profit.

Once all the costs are calculated, the rate analysis provides a detailed breakdown of the total cost of waterproofing per square foot or square meter. It helps clients, contractors, and project managers understand the cost structure and make informed decisions regarding budgeting and cost control.

Water Proofing Rate Analysis

Let us see how the rate is decided by a contractor with an example. We will calculate the cost of waterproofing for 800 Sqft area.

• Total Area to be Waterproofed: 800 square feet
• Material Cost (including coatings, sealants, membranes): ₹15,000
• Labor Cost (based on three workers for three days): ₹9,000
• Equipment and Tools Cost: ₹3,000
• Surface Preparation Cost: ₹2,000
• Overhead Costs (transportation, administrative expenses, insurance): ₹1,500
• Contingency (5% of total cost): ₹750
• Profit Margin (10% of total cost): ₹1,500

Now, let’s calculate the rate analysis for waterproofing:

1. Material Cost: ₹15,000
2. Labor Cost: ₹9,000
3. Equipment and Tools Cost: ₹3,000
4. Surface Preparation Cost: ₹2,000
5. Overhead Costs: ₹1,500
6. Contingency (5% of total cost): ₹750
7. Profit Margin (10% of total cost): ₹1,500

Total Direct Cost (Material + Labor + Equipment + Surface Preparation): ₹15,000 + ₹9,000 + ₹3,000 + ₹2,000 = ₹29,000

Total Indirect Cost (Overhead + Contingency + Profit Margin): ₹1,500 + ₹750 + ₹1,500 = ₹3,750

Total Cost of Waterproofing: Total Direct Cost + Total Indirect Cost = ₹29,000 + ₹3,750 = ₹32,750

Now, let’s calculate the cost of waterproofing per square foot:

Cost per Square Foot = Total Cost of Waterproofing / Total Area Cost per Square Foot = ₹32,750 / 800 = ₹40.94 (approx.)

Therefore, the rate analysis for waterproofing the terrace of this residential building in India is approximately ₹40.94 per square foot. This rate includes all material, labor, equipment, and overhead costs, as well as the contingency and profit margin for the contractor.