Hacking vs Non-Hacking Waterproofing in Singapore: Which Is Right for You?

TL;DR:

• Hacking waterproofing involves removing surfaces to apply a membrane directly on the substrate

• Non-hacking waterproofing is a surface application that preserves the existing finish

• Hacking offers stronger, longer-lasting waterproofing but involves more labour and disruption

• Non-hacking is faster, cheaper, and cleaner—ideal for light water exposure or aesthetic renovations

• Both require skilled contractors for proper application and long-term results

  
  

Table of Contents

1. Introduction: Why Your Waterproofing Method Matters

2. What Is Hacking Waterproofing?

3. Pros and Cons of Hacking Waterproofing

4. What Is Non-Hacking Waterproofing?

5. Pros and Cons of Non-Hacking Waterproofing

6. Which Method Is Best for Your Singapore Property?

7. Cost Comparison: Hacking vs Non-Hacking

8. Why Hire a Professional Waterproofing Contractor?

9. Conclusion: Choose the Right Approach for Lasting Protection

   
   

Introduction: Why Your Waterproofing Method Matters

In a city like Singapore, where rainfall is frequent and humidity is constant, effective waterproofing isn’t just a convenience—it’s essential. Water infiltration can damage walls, floors, and ceilings, leading to structural issues, mould growth, and costly repairs.

Choosing the right waterproofing approach—hacking or non-hacking—depends on the condition of your surface, the extent of moisture exposure, your budget, and how much disruption you can tolerate. Each method serves different scenarios, and understanding their strengths and limitations is crucial for making a smart decision.

What Is Hacking Waterproofing?

Hacking waterproofing is a traditional technique that involves removing the existing surface material—such as tiles, screed, or plaster—so that a waterproofing membrane can be applied directly onto the substrate (usually concrete).

Once the membrane is applied and cured, new surface materials (tiles, coatings, etc.) are installed over the waterproof layer. This approach ensures the membrane bonds securely with the base material, offering the highest resistance to water ingress.

Pros and Cons of Hacking Waterproofing

Pros:

• Durability: Bonding to the substrate means the waterproofing is highly resilient and less likely to peel or degrade over time.

• Best for critical zones: Ideal for wet areas like toilets, bathrooms, balconies, and rooftops where water exposure is heavy and constant.

• Versatile: Works well on aged or damaged surfaces where existing materials are no longer structurally sound.
  

Cons:

• Time-consuming: Full removal and reinstallation of surface finishes can take days or even weeks, especially in bathrooms or larger areas.

• Dusty and noisy: The hacking process creates significant dust and disruption, making it less suitable for occupied units.

• Risk of substrate damage: Poor workmanship may damage plumbing lines, electrical conduits, or weaken the slab beneath.
  

What Is Non-Hacking Waterproofing?

Non-hacking waterproofing—also known as overlay or topical waterproofing—applies a waterproofing layer over existing surfaces like tiles or screed. This method requires thorough surface cleaning and priming but avoids any removal of materials.

It is commonly used in renovations where maintaining aesthetics or minimising downtime is a priority. Coatings may include liquid membranes, acrylic sealers, or polyurethane-based solutions.

Pros and Cons of Non-Hacking Waterproofing

Pros:

• Minimal disruption: No tile removal means faster application and less mess.

• Cost-effective: Reduces labour costs and materials needed, making it a budget-friendly solution.

• Aesthetic preservation: Allows homeowners to maintain existing floor and wall finishes, especially valuable tiles or decorative work.

Cons:

• Lower adhesion strength: Overlay membranes rely on the existing surface’s stability and cleanliness for proper adhesion.

• Not suitable for active leaks: If water is already infiltrating below the surface, non-hacking methods won’t solve the root problem.

• Limited lifespan: May degrade faster than hacking systems, especially in areas with standing water or frequent thermal expansion.
  

Hydro-seal technicians applying membrane to roof

Which Method Is Best for Your Singapore Property?

Use this table to help you decide:

Situation	Best Method
Leaky bathroom floor with damaged tiles	Hacking
Light water seepage in service balcony	Non-Hacking
Renovation with tile preservation goals	Non-Hacking
Rooftop with ponding issues	Hacking
Condo toilet with active water ingress	Hacking
Fast job with minimal noise/disruption	Non-Hacking

Cost Comparison: Hacking vs Non-Hacking

In Singapore, here’s a general comparison:

Method	Typical Cost per sqm	Average Timeline	Common Use Cases
Hacking	$30–$60	4–10 days	Bathrooms, roofs, pools
Non-Hacking	$15–$35	1–3 days	Balconies, light moisture

Note: Prices vary based on materials, site access, and property type. Always request a site inspection and quote.

Why Hire a Professional Waterproofing Contractor?

Whether you choose hacking or non-hacking, success depends on proper technique. Skilled contractors:

• Identify hidden issues like concrete spalling or cracks

• Use industrial-grade materials suited for Singapore’s tropical climate

• Follow BCA and PUB regulations

• Offer warranties for peace of mind
  

An experienced contractor also ensures waterproofing is integrated with your drainage, tiling, and ventilation systems for long-term reliability.

Conclusion: Choose the Right Approach for Lasting Protection

Both hacking and non-hacking waterproofing serve valuable purposes depending on your property’s condition, water exposure, and budget. Hacking is best for durability and active leak fixes. Non-hacking suits quick fixes or cosmetic overlays.

For peace of mind and a leak-free result, consult Hydro-seal Engineering. Our experts will evaluate your needs and recommend the most effective waterproofing method.

📞 Call 6289 6811 or 📧 email enquiry@hydroseal.com.sg to schedule a free inspection.