Comparing FRP Waterproofing with Traditional Systems

28 May 2025

 

Key Takeaways

  • FRP lamination delivers superior chemical and structural durability in harsh environments.

  • It offers seamless and long-lasting waterproofing with minimal maintenance.

  • FRP is especially suitable for rooftops, tanks, chemical zones, and aquaponic systems.

  • Mui Fatt’s successful lamination project at Bandar Utama demonstrates its scalability.

Waterproofing is crucial in extending the lifespan of structures exposed to water, chemicals, or humidity. While traditional waterproofing systems like membranes and coatings have been used for decades, fiberglass-reinforced plastic (FRP) lamination is emerging as a durable and chemical-resistant alternative, especially in demanding environments.

What is FRP Lamination?

FRP lamination is a process where resin-saturated fiberglass mats are manually layered onto a surface using the hand lay-up method. Once cured, the result is a seamless, high-strength, chemical-resistant surface that adheres directly to concrete, metal, or wood.

This makes it ideal for waterproofing surfaces that require structural support, chemical exposure resistance, or a long service life.

Is FRP Lamination a New Waterproofing Method?

While FRP has long been used in industrial applications such as tanks, pipes, and structural reinforcements, its adoption as a primary waterproofing method in Malaysian building construction is relatively recent. Traditionally, most contractors have relied on bituminous membranes, cementitious coatings, or polyurethane systems.

However, FRP lamination is steadily gaining traction, particularly in customized or high-risk environments where durability, chemical resistance, and long service life are critical. These include aquaponic rooftops, high-humidity ceilings, and aggressive chemical zones, where conventional waterproofing systems often fail over time.

Side-by-side comparison of a concrete rooftop before and after FRP lamination, showcasing the transformation from weathered, unprotected surface to a seamless, waterproof, and UV-resistant FRP-coated finish.

Common Types of Conventional Waterproofing Systems

  1. Bituminous Membranes

    • Torch-applied or self-adhesive sheets.

    • Prone to delamination and UV degradation over time.

    • Requires protective screed or coating for UV protection.

  2. Cementitious Coating

    • Easy to apply and affordable.

    • Rigid and brittle — cracks under substrate movement.

    • Used mostly for internal wet areas with minimal structural stress.

  3. Polyurethane (PU) Coating

    • Offers good flexibility and crack bridging.

    • Aromatic PU degrades under UV; aliphatic PU is UV-resistant but expensive.

    • Moderate chemical resistance and requires regular maintenance.

FRP vs Conventional Waterproofing

FRP Lamination vs Common Waterproofing Systems – Performance Comparison Across Key Properties
Feature FRP Lamination Bituminous Membrane Cementitious Coating PU Coating
Seamless Application ✅ Yes ❌ No (requires overlaps) ⚠️ Partial (multiple coats) ✅ Yes
Chemical Resistance ✅ Excellent ❌ Low ❌ Low ⚠️ Moderate to High*
Structural Reinforcement ✅ Yes ❌ No ❌ No ❌ No
Durability in Wet Areas ✅ Excellent ⚠️ Moderate ❌ Poor ⚠️ Moderate
UV Resistance ✅ High ❌ Poor ❌ Poor ⚠️ Depends on PU grade
Crack Bridging ✅ Excellent ❌ No ❌ No ✅ Good

*Note: Aliphatic PU has better UV and chemical resistance but comes at a higher cost.

Benefits of FRP Lamination

  • Durability: Withstands wear, moisture, and corrosion.

  • Chemical Resistance: Ideal for use in wastewater, aquaponics, and industrial plants.

  • Structural Strength: Reinforces the surface it bonds with.

  • Seamless Finish: No joints, overlaps, or leakage points.

  • UV and Heat Resistance: Suitable for exposed rooftops and external walls.

Where is FRP Waterproofing Used?

  • Flat rooftops and balconies

  • Aquaponic systems and hydroponic tanks

  • Wastewater treatment plant walls and ceilings

  • Storage tanks, sumps, and pits

  • Restroom ceilings and public infrastructure

Project Reference: FRP Lamination at Bandar Utama

In 2022, Mui Fatt completed a major FRP lamination project for Bandar Utama City Assets Sdn. Bhd., covering 14 floors of a 28-storey building.

  • Area covered: ~17,000 sqm

  • Purpose: Aquaponic multilevel high-rise farming system

  • Duration: 3 months

  • Outcome: Zero leaks, chemical resistant, structurally sound

Read full project case study - FRP Lamination for Aquaponic System at Bandar Utama

Side-by-side comparison showing FRP-laminated curved rooftop channel before and after aquaponic use, highlighting waterproofing success in Bandar Utama tower.

Side-by-side comparison of rooftop aquaponic grow channel at Bandar Utama before and after FRP lamination, showing clear transformation and improved water containment.

FRP lamination may initially seem niche, but it is quickly becoming a preferred waterproofing method in Malaysia. Its seamless, high-performance, and long-lasting nature makes it the smart choice for modern infrastructure, especially in chemically or moisture-exposed environments.

Frequently Asked Questions (FAQs)

How long does FRP lamination last?

When properly applied using quality resin and reinforcement, FRP lamination can last 20–30 years or more, especially in protected or indoor environments. It requires minimal maintenance compared to membrane-based systems.

Can FRP be applied over existing coatings?

Yes, FRP can be applied over existing coatings or surfaces, provided the substrate is structurally sound, clean, dry, and properly prepared (e.g., through mechanical abrasion or degreasing).

Is FRP lamination safe for potable water zones?

FRP can be made safe for potable water use when food-grade resins (like vinyl ester or isophthalic polyester) are used. Make sure to specify this during design and fabrication.

Does FRP require regular recoating like PU?

FRP forms a solid, chemically bonded layer that doesn’t degrade like PU coatings. Unlike PU, which needs recoating every 5–7 years in harsh conditions, FRP remains intact for decades when properly maintained.

Is FRP lamination suitable for exposed outdoor areas?

Yes. FRP offers excellent UV resistance (especially with gelcoat or pigmented topcoats) and is commonly used in rooftops, wastewater plants, and chemical storage areas.

Can FRP lamination be repaired if damaged?

Yes. Localized damage can be easily repaired by sanding, reapplying resin and mat, and blending the area. It does not require a full system replacement like membrane systems.

How long does FRP lamination take to install?

Installation timelines vary, but for typical flat slab applications, it may take 1–2 days per 100–200 sqm, depending on the surface condition, number of layers, and curing time.

Does FRP lamination emit strong fumes during installation?

Yes, some resins (like polyester or vinyl ester) emit styrene vapors. Proper ventilation and PPE (personal protective equipment) are essential. Odor dissipates after full curing.

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