AKJ Engineers Private Limited

Why You Need Professional Waterproofing in Kolkata?

Kolkata, also known as Calcutta, experiences heavy monsoon rains every year. Without proper 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.

Our Specialized Waterproofing Services in Kolkata

Terrace, Roof Slabs & Podium Waterproofing

Heavy rains often cause leakage in rooftops and podium areas. Our Kolkata-based waterproofing experts use advanced membranes and coatings to provide durable terrace and roof waterproofing solutions.

Foundation & Basement Waterproofing

Basements and foundations are highly prone to seepage due to ground moisture. Many projects now use concrete admixtures during construction, combined with our professional waterproofing services, for long-term protection. AKJ Engineers is also recognized among trusted concrete admixture suppliers, ensuring the use of quality materials for durable results.

Bathroom, Kitchen, Balconies & Wet Area Waterproofing

Bathrooms, kitchens, and balconies require constant moisture control. Our waterproofing contractors use premium sealants to effectively prevent seepage and leakage in wet areas.

External Wall Waterproofing

Exterior walls often absorb rainwater, leading to cracks and algae growth. Our wall waterproofing services provide long-lasting protection, keeping your property strong and looking fresh.

Water Retaining Structures Waterproofing

From tanks to swimming pools, we deliver specialized waterproofing solutions for all water retaining structures, ensuring zero leakage and durable performance.

Expansion & Construction Joint Waterproofing

Expansion and construction joints are highly vulnerable to seepage. We use advanced sealants and membranes to ensure leak-proof joints that extend the life of your structure.

Commercial & Industrial Waterproofing in Kolkata

Commercial & Industrial Waterproofing Services

Recognized among the best waterproofing contractors in Kolkata, we handle large-scale commercial and industrial projects. From shopping malls to factories, our waterproofing experts provide tailored, durable solutions.

Why Early Waterproofing Saves Cost and Prevents Damage

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.

From Site Visit to Warranty: A 6-Step Journey

1.Site Visit and Preliminary Assessment

Project engineer visits the site.
Assess drawings, specifications, and site conditions.
Identify key waterproofing areas (roof, basements, wet areas, expansion joints, water tanks, podiums, etc.).
Discuss with client/contractor about construction timelines and sequencing.

2.Recommendation & BOQ

Prepare a detailed Bill of Quantities (BOQ).
Suggest appropriate Sika systems depending on the application area.
Share recommended methodology and sequence with client.

3.Quotation & Approval

Submit quotation including material + application.
Clarify inclusions/exclusions.
Finalize upon client approval.

4.Application Process

Mobilize trained waterproofing team.
Surface preparation (cleaning, repairing, leveling)
Apply primer, waterproofing coating/membrane as per specification.
Ensure correct layer thickness and curing.
Protect with screed/plaster/tiling as required.

5. Quality Checks

Site engineer inspects work at each stage.
Ensure adhesion, coverage, and detailing around junctions.
Record photos before, during, and after work.

6. Handover & Warranty

Submit completion report with pictures.
Provide application warranty certificate as per the system executed.
Offer maintenance guidelines to clients.

Waterproofing Solutions by Application

Roof & Podium Waterproofing

Cementitious waterproofing (terraces, balconies, water tanks)

Liquid-applied membranes (acrylic, polyurethane, polyurea)
Bituminous/APP membranes & torch-on systems
TPO/Sarnafil membranes
UV-resistant elastomeric coatings for terraces & external roofs

Basement Waterproofing

Roof & Podium Waterproofing

Injection grouting (PU, acrylic, epoxy for leaks & cracks)
Crystalline waterproofing for concrete structures
Sheet membranes (PVC/HDPE/TPO) for special cases
Tanking systems for basements & water-retaining structures

Wet Areas & Tanks

Roof & Podium Waterproofing

Wet Areas & Tanks

Bathroom & wetroom waterproofing with multi-layer systems
Balcony & planter waterproofing with screeds & drainage
Underground & overhead tank waterproofing
Swimming pool waterproofing

Hybrid Polyurea Waterproofing Project: Modern High School, Kolkata

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)

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

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

Frequently Asked Questions

Get clarity on common queries about our offerings.

Do you provide basement waterproofing services in Kolkata?

Yes, we are leading basement waterproofing contractors in Kolkata. Our solutions ensure your basement remains dry, safe, and free from seepage.

How much does waterproofing service cost in Kolkata?

The cost depends on the area and service type. On average, waterproofing services in Kolkata range from ₹40 to ₹100 per sq. ft.

How long does waterproofing last?

Depending on the method and maintenance, high-quality waterproofing can last 10–20 years or more.

How do I choose the right waterproofing solution?

The choice depends on the area (roof, basement, wet areas), water exposure, structure type, and client requirements. Professional assessment ensures the right system is applied.

Do waterproofing services come with a warranty?

Warranty covers workmanship and material performance, usually ranging from 5 to 10 years depending on the solutions used.

MANAGING DIRECTOR

ASHOK KUMAR JAIN

The Managing Director, Mr. A.K. Jain is a 1978 Batch Civil Engineering Graduate Chartered Engineer, having vast experience in the construction field. He is a Fellow Member of Institute of Engineers and has previously worked at National Projects Construction Corporation Limited (NPCC - Govt. of India PSU), where he was involved in multiple projects from 1978 to 1993. Some of the major projects include - Construction of subway boxes of Metro Railway from Chakroberia to Ashutosh College, Construction of Loktak Hydro Electric Project in Manipur, Construction of the main Power House, Permanent storage shed and township, and Construction of surface Power House in Jorthang, Sikkim.In 1993, he joined hands with Sika to be exclusively associated with the supply of Sika product materials and execution of job work by use of Sika materials. His leadership has enabled AKJ Engineers to be the top distributor of Sika in India for the past three decades

Expert Waterproofing Services in Kolkata

AKJ Engineers – Your Sika Waterproofing Expert!

AKJ Engineers – Your Sika Waterproofing Expert!

AKJ Engineers – Your Sika Waterproofing Expert!

AKJ Engineers – Your Sika Waterproofing Expert!

AKJ Engineers – Your Sika Waterproofing Expert!

AKJ Engineers – Your Sika Waterproofing Expert!

Sika Waterproofing Distributor & Applicator in Kolkata

Advanced Waterproofing with Sika – Kolkata’s Reliable Choice

Why You Need Professional Waterproofing in Kolkata?