Should you use paint or metal cladding to waterproof walls?

Overview of the two current wall waterproofing solutions

Features of exterior waterproof paint

Waterproof paint is a special coating that forms a water-resistant film on wall surfaces, preventing rainwater and moisture from penetrating deeply into the structure. It usually contains acrylic, polymer, or cement-based compounds with high exterior waterproofing performance. When applied properly, it protects walls from mold, flaking, and discoloration for years.

This solution suits newly built or intact walls without cracks. However, if the surface is damaged, waterproof paint alone cannot fully fix reverse seepage or deep cracks. That’s why, for heavily damp walls, homeowners often ask should you waterproof with paint or metal cladding for longer-lasting results.

Features of the metal cladding waterproofing method

Metal cladding for exterior wall waterproofing uses galvanized steel, cold-rolled, or PVC sheets to cover wall surfaces, preventing rainwater from directly touching the structure. This setup creates a “double wall” effect, reducing weather impact and completely stopping water penetration.

It is ideal for old or west-facing walls and rainy, windy regions like Central Vietnam. Compared with paint, metal cladding is more durable, requires less maintenance, and provides longer protection, though it comes with higher installation and aesthetic considerations.

When exterior walls need waterproofing

Exterior walls constantly exposed to sun and rain are prone to seepage, mold, and structural damage. Waterproofing is necessary when:

• Stains, mold, or peeling appear.
• Cracks or water marks form after rain.
• Moisture or musty smells develop indoors.
• The building is in a high-rain or coastal area.

Depending on the damage level, owners can decide whether to use waterproof paint or metal cladding - paint suits newer walls, while cladding works better for cracked or aging ones.

Comparing waterproof paint and metal cladding performance

Water resistance and mold prevention

Waterproof paint forms a thin surface film that blocks direct moisture but doesn’t prevent reverse seepage from inside. In contrast, metal cladding acts like an external shield that prevents rainwater from touching the wall. Thus, metal cladding offers superior waterproof protection, especially in humid, rainy climates.

For older walls, repainting frequently only provides short-term relief. Therefore, metal cladding waterproofing is the recommended long-term solution.

Durability and weather resistance

The average lifespan of waterproof paint is 3-5 years, depending on paint quality and application method. Metal cladding, however, can last 10-15 years, withstanding harsh sunlight, heavy rain, and coastal conditions.

For west-facing or storm-prone buildings, metal cladding is the safer, more durable option. Yet, for good-condition walls and limited budgets, waterproof paint remains a practical short-term choice.

Wall protection from sun, rain, and reverse seepage

Waterproof paint protects only one side - it blocks water from outside in. Metal cladding, meanwhile, creates an air gap between the sheet and the wall, reducing heat and preventing reverse seepage.

For long-exposed exterior walls, the choice between waterproof paint and metal cladding depends on real conditions: cracked walls should be clad, while smooth, new walls can simply be painted to save costs.

Comparing waterproof paint and metal cladding costs and lifespan

Cost of exterior waterproof paint

Waterproof painting costs around 70,000-150,000 VND/m² depending on material and surface condition. It’s easy to apply and doesn’t require complex structures. However, it needs periodic maintenance, especially on west-facing walls. Over 5-10 years, the total cost can exceed metal cladding waterproofing due to frequent repainting.

Cost of full-service metal cladding installation

Metal cladding costs roughly 250,000-400,000 VND/m² including materials and labor. Though the upfront cost is higher, its lifespan is triple that of paint, saving on maintenance and repainting. For large or exposed walls, deciding whether to use waterproof paint or metal cladding should consider total lifecycle cost, not just initial price.

Average service life and maintenance expenses

• Waterproof paint: 3-5 years, requires repainting when faded or flaked.
• Metal cladding: 10-15 years, minimal maintenance, only periodic cleaning.

Over 10 years, metal cladding costs only 60-70% compared with repeated painting. That’s why many homeowners now prefer cladding for long-term protection.

Pros and cons of waterproof paint and metal cladding

Advantages and disadvantages of waterproof paint

• Advantages:
  • Low cost, easy application.
  • Maintains the original wall appearance.
  • Ideal for new or slightly cracked walls.
• Disadvantages:
  • Short lifespan; needs repainting every few years.
  • Cannot fix deep cracks.
  • Less effective in humid or rainy climates.

Advantages and disadvantages of metal cladding waterproofing

• Advantages:
  • Absolute waterproofing and long-term protection.
  • Reduces heat, UV damage, and rain noise.
  • Long lifespan with minimal upkeep.
• Disadvantages:
  • Higher initial cost.
  • Requires skilled installation.
  • May affect aesthetics if color is mismatched.

Comparison summary for easy selection

When to choose waterproof paint or metal cladding

New or intact walls should use waterproof paint

For newly finished or undamaged walls, waterproof paint is the most suitable choice. It creates a protective film that repels rainwater, preserves color, and prevents flaking.

If there are no cracks, applying two or three coats of acrylic or cement-based waterproof paint ensures high durability. Given its lower cost, for new walls, the question of whether to waterproof with paint or metal cladding is easily answered - paint is sufficient and economical.

Old, cracked, or moldy walls should use metal cladding

For deteriorated or cracked walls, metal cladding waterproofing is the more permanent fix. The cladding isolates the wall from rain, reduces heat, and withstands wind.

This method works best for west-facing walls or humid, rainy regions like Central Vietnam. Repainting such walls only provides a temporary fix. Therefore, homeowners should choose metal cladding to ensure long-term protection and lower maintenance costs.

Climate factors affecting the choice

Climate plays a key role in deciding whether to waterproof with paint or metal cladding. In dry areas with little rain, paint provides adequate durability. But in stormy or hot regions, walls expand and crack easily, making metal cladding the smarter option.

West-facing or wind-exposed walls should be clad, while sheltered areas can rely on waterproof paint renewed every 3-5 years.

Expert tips for long-lasting wall waterproofing

Tips for exterior waterproof painting

To maximize durability:

1. Clean the wall surface thoroughly.
2. Repair cracks with sealant or waterproof mortar.
3. Apply 2-3 cross-layer coats evenly.
4. Avoid painting when humidity exceeds 85% or during rain.

Proper technique prolongs coating life, prevents seepage, and maintains aesthetics.

Metal cladding installation techniques for perfect sealing

Ensure water-tight joints by:

• Using galvanized or aluminum framing.
• Leaving a 3-5 cm air gap for insulation.
• Applying silicone sealant on overlaps.
• Overlapping panels vertically to avoid leaks.

Correct installation not only enhances waterproof performance, but also improves insulation and soundproofing.

Combining waterproof paint and metal cladding for optimal results

Some projects combine interior waterproof paint with exterior metal cladding for double protection. This dual approach shields the wall from rain while preventing internal seepage.

Before cladding, apply one or two waterproof paint layers to reinforce the surface. This hybrid method turns the paint vs. cladding decision into a comprehensive wall-protection strategy.

Conclusion - Which is better: waterproof paint or metal cladding

Choose based on wall condition and budget

There’s no one-size-fits-all answer. The choice of waterproof paint or metal cladding depends on wall integrity, local climate, and investment capacity.

• For new or undamaged walls, waterproof paint is cost-effective.
• For aged, moldy, or weather-exposed walls, metal cladding is the long-term solution.

Always inspect wall conditions carefully to avoid unnecessary costs.

Combining both methods for best results

Combining waterproof paint and metal cladding doubles durability - paint protects the inner structure, cladding shields the exterior. This synergy is ideal for hot, humid, or rainy areas, optimizing both protection and maintenance cost.

Expert recommendations

Experts suggest:

• Use metal cladding for old or rain-exposed walls.
• Repaint flat walls every 3-5 years.
• Combine both for west-facing or coastal buildings.

This balanced approach maximizes wall lifespan and preserves exterior aesthetics.

FAQ

How often should waterproof paint be reapplied?

Every 3-5 years, depending on paint type and weather. Inspect annually in harsh climates to maintain protection.

Does metal cladding reduce indoor heat?

Yes. The air gap between cladding and wall lowers surface temperature and keeps interiors 3-5 °C cooler.

Should walls be painted before cladding installation?

Yes. Painting first adds an extra waterproof layer, preventing trapped moisture between wall and cladding.

How to fix long-term damp or moldy walls effectively

Remove old paint, seal cracks, apply waterproof coating, then install metal cladding for complete moisture protection.

Who provides reliable metal cladding waterproofing in Đà Nẵng?

SKSumo Đà Nẵng offers professional turnkey metal cladding waterproofing with genuine materials, long warranties, and tailored consultations.