Kaohsiung Yancheng Old Building Exterior Renovation | Match Your Condition First

Yancheng is one of the harshest exterior wall deterioration environments in all of Kaohsiung. Sea wind salt damage × harbor humidity × aging urban buildings × relentless wind and rain — three forces hitting without pause, year after year. Salt corrodes rebar, destroys tile adhesion, and doubles the rate of coating breakdown. Without salt-zone standard installation, renovation will fail regardless.

Match Your Building's Problem First

5 Mandatory Inspections Before Any Work Begins

Yancheng's environment is harsher than standard urban areas. Skip any one of these and renovation will need to be redone.

1. Exterior wall deterioration assessment — Are tiles hollow or falling across large areas? Is cement mortar crumbling, powdering, or showing water staining? Is existing coating bubbling and peeling everywhere?
2. Salt damage level check — Any exposed rebar, rust staining on parapet walls, rust streaks from iron windows or rain shields running down the wall, or softening / whitening cement?
3. Crack classification — Hairline cracks: coating can handle. Over 0.3mm: V-groove + resin fill required. Diagonal or through-cracks: possible structural issue or settlement — needs separate assessment.
4. Moisture content reading — Coastal humidity is persistent. Over 8–12% means all coatings will bubble. Must be measured and confirmed before work begins.
5. Water ingress source mapping — Most common in Yancheng: exterior wall cracks, window frame corners, balcony underside, parapet wall cracks, and water seeping through corroded iron window screw holes.

5 Methods Compared — Find the Right Fit for Your Building

A｜Salt-Resistant High-Durability Elastic Coating

Best cost-performance ratio. Best for: old cement walls, heavy cracking, severe powdering Yancheng mandatory upgrades: deep-penetrating anti-salt primer + salt-resistant base coat — cannot be skipped ✔ UV-resistant ✔ Anti-powdering ✔ Flexible — absorbs hairline crack movement ✔ Good waterproofing ✔ Mid-range cost ⚠ Moist substrate causes bubbling — primer cannot be omitted in salt-damage zones

B｜Mineral Coating / Silicate Coating

First choice for walls with severe moisture rebound and repeated waterproofing failures Breathable system lets moisture disperse outward — no trapped humidity, no bubbling, root cause eliminated ✔ No bubbling ✔ No powdering ✔ UV and heat resistant ✔ High long-term durability ⚠ Higher cost — strict substrate preparation required

C｜Stone-Texture Coating

Strongest visual transformation — simultaneously addresses harbor dust and humidity Strong anti-pollution performance + fade-resistant — the most visible improvement on a Yancheng old building renovation ✔ Anti-pollution ✔ Fade-resistant ✔ High-quality stone-like appearance ⚠ Mid-to-high cost — requires crew with proven salt-environment experience

D｜Full Tile Removal + Re-tiling

Required when tiles are hollow across the full surface, lifting, or already falling Yancheng's coastal humidity and sea wind accelerate tile deterioration faster than inland areas. Mandatory method: mechanical anchor bolts + elastic mortar (dual-fix system) ⚠ New tiles without anchor bolts will fall again

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

The one-time solution — for those who don't want to renovate again for 20 years Materials: fiber cement board, aluminum panels, honeycomb panels, metal cladding panels ✔ Fully salt-proof ✔ Unaffected by moisture or thermal expansion ✔ Ventilation gap noticeably lowers indoor temperature ✔ Strong anti-pollution ⚠ Highest upfront cost — specialist crew required for edge detailing

Standard 11-Step Construction Process (Yancheng Reinforced Version)

1.  Scaffolding setup + safety measures

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

3.  Hollow tile inspection → removal → mortar patching

4.  V-groove crack cutting + resin injection fill

5.  Rebar corrosion: rust removal + anti-rust coating

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

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

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

9.  Anti-pollution transparent topcoat (strongly recommended for salt-damage zones)

10. Window frame and projecting window edge sealing (backer rod + silicone + cover strip)

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

2026 Yancheng Pricing Reference

Copy & Send This to Any Contractor When Requesting a Quote

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

1. On-site inspection report: hollow tile rate, crack classification, salt damage level, moisture content
2. Recommended method (coating / tile / cladding) with reasoning
3. Anti-salt material specifications + construction sequence
4. Itemized quote: scaffolding / substrate repair / coating / edge sealing
5. Warranty terms: water ingress, adhesion failure, color fading — years covered for each
6. Salt-environment project references (with photos)
7. 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.