Introduction
One of the most important aspects of building construction and maintenance is waterproofing. In Malaysia’s hot and humid climate, water leakage can cause serious structural damage, health issues from mould, and costly repairs.
Yet, many property owners and contractors still make common waterproofing mistakes that shorten the building’s lifespan. In this guide, we’ll share the top 5 waterproofing mistakes to avoid in 2025—and how to ensure your property stays protected.
1. Using the Wrong Waterproofing System
Not every structure is a good fit for every waterproofing system. For example:
- PVC membrane works well for large exposed roofs.
- Polyurea coating is suitable for podiums and high-traffic areas.
- Injection grouting solves leakage through cracks and joints.
👉Mistake: Choosing a one-size-fits-all approach.
✅Solution: Always engage a specialist waterproofing contractor in Malaysia to recommend the right system based on your building’s condition.
2. Poor Surface Preparation
Even the best waterproofing system will fail if the surface is not properly prepared.
- Dust, laitance, and oil stains reduce adhesion.
- Cracks and honeycombed concrete allow hidden leak paths.
👉Mistake: Skipping cleaning and repair steps.
✅Solution: Ensure thorough concrete repair, crack injection, and surface preparation before applying any waterproofing layer.
3. Ignoring Expansion Joints & Details
Leakages often occur at:
- Construction joints
- Expansion joints
- Pipe penetrations
- Corners and termination
👉Mistake: Waterproofing only the flat surfaces.
✅Solution: Pay special attention to all detail areas with flexible joint sealants or mechanical pinning systems to prevent future leaks.
4. No Regular Inspection & Maintenance
Waterproofing is not a one-time job. Over time, coatings may degrade, or building movement may open new cracks.
👉Mistake: Waiting until water leakage is visible.
✅Solution: Schedule regular façade inspections, infrared surveys, or drone checks to detect early warning signs.
5. Hiring Non-Specialist Contractors
Many general contractors claim to “do waterproofing” but lack specialist training. Poor workmanship leads to premature failure.
👉Mistake: Choosing the lowest-price contractor.
✅Solution: Work only with a CIDB-registered waterproofing specialist in Malaysia who provides warranty and proven project references.
Conclusion
Waterproofing mistakes can cost millions in repairs and loss of property value. By avoiding these five common errors and working with a recommended waterproofing contractor, you can safeguard your building for decades to come.
📞Looking for a trusted waterproofing specialist in Malaysia?
Contact Structural Repairs (M) Sdn Bhd today for a consultation and site inspection.
📧 Email us: structuralrepairs@gmail.com
🌐 Visit: https://structuralrepairs.com.my
📞 Whatsapp: +60 12-334 9113
📍 Based in Kuala Lumpur, serving all of Malaysia
