Waterproofing is one of the most crucial yet often overlooked stages in construction. Whether it’s a residential building, commercial structure, or large-scale infrastructure, improper waterproofing can lead to extensive damage, costly repairs, and structural failures. Understanding common waterproofing mistakes can help you avoid unnecessary losses and ensure your building stands the test of time.
1. Ignoring Waterproofing at the Design Stage
Many projects make the mistake of treating waterproofing as an afterthought. It’s far more effective to incorporate waterproofing solutions during the design and planning stage rather than trying to fix issues later. Early planning allows the use of appropriate systems, products, and detailing to suit the structure’s purpose and exposure conditions.
2. Choosing the Wrong Waterproofing System
Not all waterproofing systems are the same. What works for a basement might fail on a roof deck. Cementitious coatings, liquid membranes, and crystalline systems each serve specific purposes. Selecting the wrong system for your structure’s conditions can lead to failure, even if the application was done perfectly. Consulting a professional or relying on trusted brands like Costarchem ensures you choose the right product for long-term protection.
3. Poor Surface Preparation
Even the best waterproofing product cannot perform well on a poorly prepared surface. Dust, grease, laitance, or moisture trapped beneath the membrane can compromise adhesion. Proper surface cleaning, leveling, and priming are key steps in ensuring a durable waterproofing layer.
4. Inadequate Application and Workmanship
Waterproofing success depends heavily on skilled application. Uneven coating, insufficient thickness, or missed joints can create weak spots where water can penetrate. Always ensure the job is done by trained professionals who follow the manufacturer’s specifications.
5. Ignoring Expansion Joints and Cracks
Concrete naturally expands and contracts with temperature changes. Failing to properly seal expansion joints or repair cracks before applying waterproofing can lead to leaks and structural stress over time. Using the right sealants and repair mortars is essential for maintaining watertight integrity.
6. Neglecting Regular Maintenance
Even after a successful waterproofing installation, routine inspections and maintenance are vital. Small leaks, drainage blockages, or wear in exposed membranes can worsen over time. Preventive maintenance saves you from larger repair costs in the future.
Protect Your Investment with Costarchem
At Costarchem Nigeria, we specialize in advanced waterproofing systems designed to meet modern construction demands. From crystalline waterproofing to liquid-applied membranes and cementitious coatings, our products provide durable protection against water ingress.
Waterproofing isn’t just an extra step — it’s a long-term investment in the strength, safety, and durability of your structure.
