Kaohsiung Qianzhen Old Building Exterior Renovation | Match Your Condition First

Qianzhen has one of the most complex exterior wall deterioration environments in all of Kaohsiung. Harbor salt damage × industrial dust × intense UV × afternoon downpours × densely packed old buildings — five forces fully concentrated in one area. Salt from the port zone, fishing harbor, and Qianzhen River rapidly corrodes metal fixtures, destroys tile adhesion, and doubles coating breakdown rates. Without targeted treatment, renovation can fail within a year.

Match Your Building's Problem First

5 Mandatory Inspections Before Any Work Begins

Qianzhen's environment is harsher than standard urban areas. Skip any one of these and renovation will fail quickly.

1. Exterior wall condition assessment — Are tiles hollow, lifting, or falling across large areas? Is the cement surface powdering, peeling, or showing water staining? Is existing coating bubbling and peeling everywhere?
2. Salt damage level check — Any exposed rebar with spreading rust, rust water running from metal window frames, white salt efflorescence on light-colored tiles, or softening / crumbling cement surface?
3. Crack classification — Hairline cracks: coating can handle. Wide cracks: V-groove + resin fill required. Diagonal or window corner cracks: structural issues must be ruled out. Rebar-exposed cracks: concrete repair must come before anything else.
4. Moisture content reading — Coastal location + afternoon downpours keep the substrate chronically wet. Over 12% means all coatings will bubble and peel. Must be reduced to 8–12% before work begins.
5. Water ingress source mapping — Most common in Qianzhen: window frame corners, A/C pipe holes, balcony slab joints, window sills without drip edges, parapet walls, and wall cracks.

5 Methods Compared — Find the Right Fit for Your Building

A｜Salt-Resistant High-Durability Elastic Coating

Best cost-performance ratio. Best for: cement walls, heavy cracking, large powdering areas Qianzhen mandatory upgrades: anti-salt primer (required) + fiberglass mesh reinforcement (recommended) ✔ UV-resistant ✔ Flexible coating absorbs hairline crack movement ✔ Good waterproofing ✔ Mid-range cost ⚠ Moist substrate causes bubbling — large cracks need additional reinforcement before coating

B｜Silicate / Mineral Coating

First choice for walls with chronic bubbling, efflorescence, or persistent moisture rebound Breathable system lets moisture disperse outward — no trapped water, no bubbling, and better salt-resistance than standard coatings ✔ No bubbling ✔ No powdering ✔ Salt-resistant ✔ Long service life ⚠ Higher cost — substrate leveling requirements are more precise

C｜Stone-Texture Coating

Strongest visual transformation — simultaneously solves Qianzhen's industrial dust problem Granite-like appearance with strong anti-pollution performance — ideal for industrial zone and road-facing facades ✔ Strong anti-pollution ✔ Fade-resistant ✔ Good UV resistance ⚠ Mid-to-high cost — requires crew with strong technical skill

D｜Full Tile Removal + Re-tiling

Required when tiles are hollow or already falling In Qianzhen, salt damage + heat + humidity make tiles deteriorate more than twice as fast as inland areas. Mandatory method: elastic mortar + mechanical anchor bolts (dual-fix system) ⚠ New tiles without anchor bolts still carry a falling risk

E｜Dry-Cladding System (Qianzhen's Most Powerful Solution)

One renovation — no worries for 20 years Materials: aluminum panels, fiber cement board, honeycomb panels, metal cladding panels ✔ Fully immune to sea wind and salt damage ✔ Ventilation gap significantly lowers indoor temperature ✔ Won't crack or absorb moisture ✔ Excellent anti-pollution ✔ Individual panels replaceable ⚠ Highest cost — requires crew with dry-installation experience

Standard 11-Step Construction Process

1.  Scaffolding setup + safety measures

2.  High-pressure cleaning at 150 bar (removes salt deposits, oil film, loose coating)

3.  Hollow tile inspection → removal → mortar patching

4.  V-groove crack cutting + resin reinforcement fill

5.  Exposed rebar: rust removal + anti-rust primer + mortar repair

6.  Anti-salt deep-penetrating primer (mandatory in Qianzhen — never skip)

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

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

9.  Anti-pollution transparent topcoat (highly suited to Qianzhen's industrial environment)

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

11. Post-completion water-spray leak test (required for all coastal sites — photo/video documentation needed)

2026 Qianzhen Pricing Reference

Copy & Send This to Any Contractor When Requesting a Quote

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

1. On-site inspection report: hollow tile rate, crack classification, moisture content, salt damage level
2. Recommended method (coating / tile / cladding) with reasoning
3. Anti-salt material specifications + construction sequence and timeline
4. Itemized quote: scaffolding / substrate repair / coating / edge sealing / debris removal
5. Warranty terms: water ingress / adhesion failure / color fading — years covered for each
6. Qianzhen or coastal area project references (with photos)
7. Post-completion water-spray test record (video or photo required)

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