Looking for reliable roof waterproofing services in Pakistan? You’re in the right place. Grace Chemicals provides professional waterproofing solutions using German Schomburg technology. We protect homes and commercial buildings from roof leakage and seepage. Our team serves Lahore, Karachi, Islamabad, and all major cities across Pakistan
Summary of Application |
Step 1: Surface Preparation & Grinding of the RCC slab |
Step 2: Repairs using INDUCRETE SC10 & INDUGROUT GP (if required) |
Step 3: Slab Joint Treatment with sealant & FLEECE-110 tape |
Step 4: Chamfer Making at wall-floor junctions |
Step 5: Primer Application using ASO UNIGRUND P |
Step 6: Waterproofing Coating with AQUAFIN (TC07 / 2C / 2K/M) |
Roof waterproofing is critical for every building in Pakistan. Once a structure is occupied, renovating or maintaining roofs becomes extremely difficult. This is why proper waterproofing at the right time is essential.
Grace Chemicals provides a complete roof waterproofing system using German Schomburg (AQUAFIN) technology. Our system is designed for long-term protection against Pakistan’s harsh climate conditions.
The intention behind this system is simple. Once applied correctly, there should be little to no maintenance required for 7-10 years. As a result, you save money and avoid the hassle of repeated repairs.
This system works on new RCC roofs, old damaged roofs, and precast slabs (Izhar Slabs). Below is the complete step-by-step process our teams follow for every project.
The first and most critical step is proper surface preparation. This step determines how well the entire waterproofing system will perform. Many failed waterproofing treatments can be traced back to poor surface preparation.
Our team mechanically grinds the entire roof surface to achieve a clean, sound substrate. During this process, we remove:
This creates a rough, clean surface that allows waterproofing materials to bond strongly. Without proper grinding, even the best coatings will fail over time. Therefore, we never skip this step regardless of how clean the roof appears.
For old or damaged roofs, repair work is essential before applying the waterproofing system. Applying coating over cracks or damaged areas will result in failure. The coating will simply crack along with the substrate.
We use specialized German-engineered repair products for different types of damage:
| Product | Type | Used For |
| INDUCRETE SC10 | Non-shrinkage repair mortar | Cracks, surface damage, spalled concrete |
| INDUGROUT GP | Cementitious grout | Cavities, voids, honeycombs |
| INDUBOND VK 4034 | Epoxy mortar | Exposed steel reinforcement protection |
All repairs must be fully cured before proceeding to the next step. This typically takes 24-48 hours depending on the repair size and weather conditions.
Slab joints are one of the most common areas where water infiltration occurs. These joints naturally move due to thermal expansion and contraction. If not properly treated, they become the primary source of roof leakage.
Our joint treatment process involves three critical steps:
The FLEECE-110 tape provides additional reinforcement over the joint. It bridges any future movement and prevents cracks from transferring through the waterproofing layer. This is especially important for precast slabs (Izhar Slabs) which have multiple joints.
Once joint treatment is complete, we create chamfers at all wall-floor junctions. This includes junctions between the roof slab and parapet walls, as well as around any skylight openings or other penetrations.
The chamfer should be at least 4 inches tall and 4 inches wide along the entire junction area. We use two methods based on the joint condition:
Joint Condition | Chamfer Method |
Normal Joints | SBR Latex mixed with Terrazzo Chips – economical and effective |
Critical / Cracked Joints | FLEECE-110 Tape with flood coat – reinforced protection for high-risk areas |
Roof waterproofing is critical for every building in Pakistan. Once a structure is occupied, renovating or maintaining roofs becomes extremely difficult. This is why proper waterproofing at the right time is essential.
Grace Chemicals provides a complete roof waterproofing system using German Schomburg (AQUAFIN) technology. Our system is designed for long-term protection against Pakistan’s harsh climate conditions.
The intention behind this system is simple. Once applied correctly, there should be little to no maintenance required for 7-10 years. As a result, you save money and avoid the hassle of repeated repairs.
This system works on new RCC roofs, old damaged roofs, and precast slabs (Izhar Slabs). Below is the complete step-by-step process our teams follow for every project.
After all repairs and chamfers are complete, we apply ASO UNIGRUND P primer to the entire roof surface. This German-engineered primer serves multiple critical functions in the waterproofing system.
The primer performs the following functions:
Important Note: We always use primer regardless of which waterproofing coating is selected. Skipping the primer step significantly reduces the system’s lifespan and effectiveness.
The final step is applying the roof waterproofing coating. This is where German Schomburg AQUAFIN technology truly shines. We apply the coating in multiple layers using a specific technique for maximum effectiveness.
The coating application process:
This perpendicular application ensures complete coverage with no pinholes or weak spots. The coating forms a seamless, flexible membrane over the entire roof surface.
Available Waterproofing Coatings
We select the appropriate coating based on your roof condition, expected movement, and budget. Here are the available options:
Coating | Type | Best For | Budget |
AQUAFIN TC07 | 2-component cementitious | New RCC roofs | Economy |
AQUAFIN 2C | Polymer modified flexible | Some movement | Mid-Range |
AQUAFIN 2K/M | Highly flexible membrane | Old buildings, critical | Premium |
Precast slabs like Izhar Slabs require additional attention due to their multiple joints. These joints are the primary weak points for water infiltration. Therefore, we follow an enhanced process for precast roofs:
Step | Action |
1 | Apply polyurethane or polysulphide sealant in all precast slab joints |
2 | Apply FLEECE-110 tape with flood coat of waterproofing material over all joints |
3 | Apply ASO UNIGRUND P primer on entire surface |
4 | Apply selected waterproofing coating (AQUAFIN TC07 / 2C / 2K/M) |
This schematic illustrates the complete engineered waterproofing build-up for RCC roof slabs, including proper termination at parapet walls. The system is designed to provide long-term protection against water ingress, thermal movement, and structural stress.
The build-up consists of:
• RCC Slab as the structural base
• Slope-maintained new screed to ensure proper drainage
• Primer application (ASO-Unigrund-P) to enhance adhesion
• Polymer-modified flexible waterproofing coating (Aquafin-2C)
• Fleece fabric reinforcement embedded within the coating for crack-bridging and movement resistance
• 300 mm vertical upturn over parapet wall for secure termination and protection against lateral water ingress
This integrated system ensures:
Seamless waterproofing continuity
Enhanced crack-bridging performance
Resistance to ponding water and hydrostatic pressure
Improved durability at critical junctions
Long-term roof performance with minimal maintenance
The architecture is engineered to address both horizontal surface protection and vertical termination detailing, ensuring complete envelope waterproofing.
Grace Chemicals provides professional roof waterproofing services in all major cities of Pakistan. Our trained teams are ready to serve you:
Roof Waterproofing in Lahore | Roof Waterproofing in Karachi |
Roof Waterproofing in Islamabad | Roof Waterproofing in Rawalpindi |
Roof Waterproofing in Faisalabad | Roof Waterproofing in Multan |
Roof Waterproofing in Peshawar | Roof Waterproofing in Gujranwala |
The best method is a complete system approach as described above. Simply applying a coating without proper surface preparation, repairs, and priming will not provide long-term results. Our German Schomburg AQUAFIN system addresses all aspects of roof waterproofing.
With proper application using quality products, our roof waterproofing system lasts 7-10 years or more. The lifespan depends on product selection, application quality, and weather exposure conditions.
Yes, we specialize in waterproofing old and damaged roofs. The process requires additional repair work using INDUCRETE SC10 and INDUGROUT GP before applying the waterproofing system. This ensures a sound substrate for the coating.
Absolutely. Our German Schomburg AQUAFIN products are specifically designed to withstand heavy rainfall. The system creates a seamless, flexible barrier that prevents water penetration even during Pakistan’s intense monsoon rains.
Surface preparation determines how well the waterproofing system bonds to the roof. Without proper grinding and cleaning, even premium coatings will peel off within months. This is the most common reason for waterproofing failures.
TC07 is a standard cementitious coating for new roofs (economy). 2C is polymer modified with higher flexibility for roofs with some movement (mid-range). 2K/M is a highly flexible membrane for critical projects and old buildings (premium). Selection depends on roof condition and budget.
Want to learn how to do roof waterproofing yourself? Read our complete Roof Waterproofing Guide for step-by-step instructions and expert tips
Welcome to our blog section your go-to resource for understanding and solving waterproofing challenges in buildings.Our expert guides combine real-world case studies, step-by-step repair methods, and product recommendations used in homes and commercial projects across Pakistan.Whether you’re dealing with construction problems or planning preventative solutions.
