Expert Waterproofing Services in Kolkata

Sika Waterproofing is one of the most globally trusted waterproofing systems, widely used in residential, commercial, and industrial construction projects across India. At AKJ Engineers, we specialize in delivering professional Sika waterproofing solutions that provide long-lasting protection against leakage, dampness, and structural damage.

Sika offers a comprehensive range of waterproofing products including cementitious coatings, liquid-applied membranes, polyurethane systems, crystalline waterproofing, injection grouts, and high-performance sheet membranes. These systems are designed to perform under extreme conditions—making them ideal for Kolkata’s heavy rainfall, high humidity, and fluctuating temperatures.

As an experienced waterproofing contractor, AKJ Engineers follows Sika-recommended application methodologies, surface preparation standards, and curing practices to ensure maximum durability and performance. Whether it is terrace waterproofing, basement protection, wet area sealing, or water-retaining structures, Sika Waterproofing systems provide superior adhesion, flexibility, and resistance to water ingress.

Using genuine Sika materials not only enhances the life of the structure but also minimizes long-term maintenance costs. Our engineers carefully assess site conditions, structural requirements, and exposure levels before selecting the appropriate Sika waterproofing system—ensuring a tailored and technically sound solution for every project.

With proven results across multiple projects, Sika Waterproofing remains a preferred choice for builders, architects, and property owners looking for reliable and tested waterproofing solutions backed by global R&D and local technical support.

Kolkata, also known as Calcutta, experiences heavy monsoon rains every year. Without proper Sika waterproofing services, buildings face serious issues:

• Leakage in terraces and roofs
• Damp walls leading to paint peeling
• Flooding in basements
• Cracks in structures due to seepage
• Mold and mildew growth

That’s why hiring a waterproofing expert in Kolkata is not just a choice but a necessity. At AKJ Engineers, we combine modern techniques with years of expertise to give you a complete and lasting solution.

 Waterproofing is most effective when executed during construction, not after dampness has already appeared. Post-damp treatments are more expensive, less durable, and disruptive since they involve repairs or demolition of finished surfaces. 

Best practice stages for waterproofing

• Foundation & Basement → before soil backfilling to prevent groundwater ingress.
• Roof Slabs & Podiums → after curing, before tiles/screed are laid.
• Bathrooms, Balconies & Wet Areas → Before plastering/tile fixing.
• Water Retaining Structures (tanks, swimming pools) → before final plaster/tiling.
• Expansion & Construction Joints → integrated at the structure stage, not retrofitted.

Clients are advised to pro-actively plan waterproofing as part of the construction timeline to save costs, reduce risks, and ensure long-term durability.

 Scope: Customer required us to execute roof waterproofing in the new building. The structure had multiple cracks on the surface. After discussing with the Sika specifications team, we recommended executing a spray applied hot application method of hybrid polyurea waterproofing with a 2-component Wagner spray machine. 

Work carried out (summary)

1. Remove loose debris, clean and grind the substrate.
2. Repair cracks with epoxy crack sealing material
3. Prime substrate with solvent based epoxy primer
4. Apply 2C hot spray hybrid polyurea liquid membrane (2 coats)
5.  Install protective screed. 

Outcome: No leakage issues over 2 monsoons (client feedback)