Kaohsiung Nanzi Old Building Exterior Renovation | Match Your Condition First

Nanzi's exterior walls face compound deterioration — not a single problem. Industrial dust × intense UV × summer downpours × densely packed old buildings, plus light salt damage from the Kaohsiung Harbor wind corridor — five forces hitting simultaneously. Without targeted treatment, renovation won't last.

Match Your Building's Problem First

4 Mandatory Inspections Before Any Work Begins

Skip any one of these and problems will reappear after renovation.

1. Exterior wall deterioration assessment — What is the tile hollow rate? Are tiles lifting in sheets? Is cement mortar crumbling or powdering? Is existing paint peeling across large areas?
2. Crack classification — Hairline cracks: coating can handle. Over 0.3mm: V-groove + resin fill required. Diagonal cracks: possible structural issue needing separate assessment. Rebar-level cracks: rust removal must come before any repair.
3. Moisture content reading — Nanzi's frequent summer downpours keep moisture levels high. Over 8–12% means all coatings will bubble. Must be confirmed before work begins.
4. Water ingress source mapping — Most common in Nanzi: window frame corners, aged window silicone, balcony slab joints, A/C pipe penetrations, and metal fixture screw holes.

5 Methods Compared — Find the Right Fit for Your Building

A｜High-Durability Elastic Coating

Best cost-performance ratio. Best for: cement walls, heavy cracking, severe surface powdering Nanzi's heavy industrial dust means anti-pollution transparent topcoat must be added — without it, the wall turns black within one to two years ✔ UV-resistant ✔ Absorbs hairline crack movement ✔ Good waterproofing ✔ Budget-friendly ⚠ Moist substrate causes bubbling — moisture content must be confirmed before work begins

B｜Mineral Coating / Silicate Coating

First choice for walls with high moisture, chronic bubbling, or repeated repainting failure Breathable system lets moisture disperse outward — eliminates bubbling at the root cause ✔ No bubbling ✔ No powdering ✔ UV-resistant ✔ Strong anti-pollution performance ⚠ Higher material cost — strict substrate preparation required

C｜Stone-Texture Coating

Strongest visual transformation — simultaneously solves Nanzi's industrial dust problem Stone-like appearance with strong anti-pollution performance — ideal for facades near industrial zones and main roads ✔ Strong anti-pollution ✔ Weatherproof and rain-resistant ✔ Fade-resistant ✔ Significant appearance upgrade ⚠ Mid-to-high cost — requires crew with proven application experience

D｜Full Tile Removal + Re-tiling

Required when tiles are hollow or already falling Nanzi's severe thermal expansion cycles make this mandatory: elastic mortar + mechanical anchor bolts (dual-fix system) ⚠ Patching tiles without anchor bolts means they will fall again

E｜Dry-Cladding System (Most Durable + Strongest Insulation)

Solves industrial dust, light salt damage, and indoor heat in one project Materials: aluminum panels, fiber cement board, honeycomb panels ✔ Resists industrial dust and light salt damage ✔ Ventilation gap significantly lowers indoor temperature ✔ Won't bubble, crack, or fall ⚠ Highest upfront cost — specialist crew required

Standard 11-Step Construction Process

1.  Scaffolding setup + safety measures

2.  High-pressure cleaning at 150 bar (removes dirt, dust, loose coating)

3.  Hollow tile inspection → removal → mortar patching

4.  V-groove crack cutting + resin injection fill

5.  Exposed rebar: rust removal + anti-rust treatment

6.  Deep-penetrating primer coat (improves adhesion)

7.  Full-surface fiberglass mesh reinforcement (strongly recommended)

8.  Main coating in 2–3 layers (elastic / mineral / stone-texture)

9.  Anti-pollution transparent topcoat (essential for Nanzi's industrial dust environment)

10. Window frame, rain shield, and pipe edge sealing (backer rod + silicone + cover strip)

11. Post-completion water-spray leak test (photo/video documentation required)

2026 Nanzi Pricing Reference

Copy & Send This to Any Contractor When Requesting a Quote

I need an exterior wall renovation quote for an old building in Nanzi, Kaohsiung. Please provide:

1. On-site inspection report: hollow tile rate, crack classification, moisture content
2. Recommended method (coating / tile / cladding) with reasoning
3. Material specifications: coating product, anchor bolt type, fiberglass mesh specs
4. Construction sequence and project timeline
5. Itemized quote: scaffolding / substrate repair / coating / edge sealing / debris removal
6. Warranty terms: water ingress, adhesion failure, color fading — years covered for each
7. Nanzi or northern Kaohsiung project references (with photos)
8. Post-completion water-spray test record (photo or video required)

When requesting a quote, please provide first: floor area, current condition photos, and project location.