Factory Floor Paving Bitumen In Hong Kong
Last updated: 2026-10-12
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Factory Floor Paving Bitumen In Hong Kong
Factory floor paving bitumen in Hong Kong typically costs HK$1,200–HK$2,800 per square metre for a full-depth industrial-grade installation, depending on load class, substrate condition, and whether you specify penetration-grade (60/70, 80/100) or polymer-modified bitumen (PMB 40, PMB 76). A standard 2,000 m² warehouse floor using 50 mm compacted bituminous base plus 25 mm wearing course consumes roughly 150–180 tonnes of bitumen mix and takes 7–12 working days to complete, excluding curing. For heavy forklift and container-handling zones (load class above 50 kN/m²), expect the upper end of that range plus a 15–25% premium for PMB.
Why Hong Kong Factories Specify Bitumen Flooring
Hong Kong's industrial stock is concentrated in Kwai Chung, Tsuen Wan, Yuen Long, Fanling, and Tuen Mun, where older reinforced-concrete floors frequently suffer from spalling, joint failure, and chemical erosion. Bituminous paving offers a fast-cure, flexible alternative to epoxy or rigid concrete overlays, particularly where:
- Dynamic wheel loads (forklifts, reach stackers, gantry legs) cause cracking in rigid slabs
- Chemical exposure (lubricants, mild acids, coolants) attacks cementitious toppings
- Downtime tolerance is low — bitumen mats can be trafficked within 4–8 hours of compaction
- Substrate movement is expected — flexible pavement accommodates differential settlement better than epoxy
The trade-off is heat sensitivity. Hong Kong's summer surface temperatures on unshaded factory floors can reach 55–65°C, which is why PMB 40/PMB 76 with softening points above 70°C is mandatory for exposed bays.
| Floor Type | Typical Unit Cost (HK$/m²) | Load Capacity | Cure Time | Lifespan |
|---|---|---|---|---|
| Epoxy coating | 280–650 | Low–medium | 3–7 days | 5–8 years |
| Rigid concrete overlay | 900–1,600 | High | 14–28 days | 15–25 years |
| Bitumen base + wearing course | 1,200–2,000 | High | 4–8 hours | 10–18 years |
| PMB heavy-duty paving | 2,000–2,800 | Very high | 6–10 hours | 15–20 years |
| Bitumen + epoxy hybrid topping | 2,500–3,500 | Very high | 2–4 days | 12–20 years |
Bitumen Grades and Mix Design for Hong Kong Conditions
Hong Kong's sub-tropical climate — high humidity (70–85% RH), mean summer temperatures of 28–31°C, and monsoon rainfall — rules out standard penetration grades for exposed factory floors. The specification table below reflects what local contractors and the Architectural Services Department (ASD) guidelines typically accept.
| Grade | Softening Point (°C) | Penetration (0.1 mm) | Best Use | Hot-Mix Cost (HK$/tonne) |
|---|---|---|---|---|
| Pen 60/70 | 49–56 | 60–70 | Internal, shaded, light load | 3,800–4,400 |
| Pen 80/100 | 45–52 | 80–100 | Temporary or low-traffic zones | 3,600–4,200 |
| PMB 40 | 65–75 | 35–45 | Exposed bays, forklift routes | 5,200–6,300 |
| PMB 76 | 70–80 | 25–35 | Container yards, heavy wheel load | 5,800–7,000 |
| CRMB (crumb rubber) | 60–70 | 40–50 | Sound-dampened assembly floors | 5,000–6,000 |
Aggregate gradation for factory floors should be a dense-graded 0/10 or 0/14 mm mix with a filler content of 4–7% by mass. This produces a tight, low-porosity mat that resists oil ingress — a critical factor in machine shops and food-processing units.
- Binder content: 5.5–6.5% for 0/10 mixes; 5.0–6.0% for 0/14
- Air voids: target 4–6% after compaction
- Compaction: minimum 98% of Marshall density, achieved with tandem rollers plus pneumatic tyres
- Tack coat: 0.3–0.5 kg/m² of emulsified bitumen between layers
Step-by-Step Installation Process and Timeline
A typical 2,000 m² factory floor in Hong Kong follows this sequence. Timings assume a single shift, dry weather, and unobstructed access.
| Phase | Activity | Duration | Key Spec |
|---|---|---|---|
| 1 | Site survey and substrate testing | 1–2 days | Pull-off / core tests, moisture <5% |
| 2 | Milling or scarifying existing floor | 2–3 days | Remove 30–50 mm, expose sound base |
| 3 | Crack repair and joint sealing | 1–2 days | Hot-pour sealant, 10–15 mm reservoir |
| 4 | Prime and tack coat | 0.5 day | 0.3–0.5 kg/m² emulsion |
| 5 | Base course lay (50 mm) | 2–3 days | 0/14 mix, PMB where specified |
| 6 | Wearing course lay (25 mm) | 1–2 days | 0/10 mix, PMB 40 |
| 7 | Compaction and joint finishing | 0.5–1 day | 98% Marshall density |
| 8 | Line marking and handover | 0.5–1 day | Thermoplastic or epoxy paint |
Total: 7–12 working days. Add 2–3 days if the substrate requires full-depth repair or if the site is in a restricted-access industrial building where mixers cannot reverse to the pour point.
Compared to epoxy (3–7 days cure per coat, often two coats) or rigid concrete (14–28 days cure), bitumen wins on downtime, which is why 3PL operators in Kwai Chung increasingly schedule repaving during Chinese New Year shutdowns or between lease turnovers.
Cost Breakdown and Comparison Table
Costs below are 2024–2025 indicative rates for Hong Kong, quoted in HK$ per square metre, including labour, plant, and materials but excluding VAT-analogous charges and landlord approval fees.
| Cost Component | Unit | Low (HK$) | High (HK$) | Notes |
|---|---|---|---|---|
| Milling/removal | per m² | 80 | 180 | Depth-dependent |
| Substrate repair | per m² | 100 | 350 | Crack/joint dependent |
| Prime & tack coat | per m² | 25 | 45 | Emulsion |
| Base course (50 mm) | per m² | 350 | 600 | Pen 60/70 |
| Wearing course (25 mm) | per m² | 250 | 480 | PMB 40 |
| Compaction & finishing | per m² | 120 | 220 | Rollers, hand work |
| Line marking | per m² | 40 | 90 | Layout dependent |
| Total (standard) | per m² | 1,200 | 2,000 | — |
| Total (heavy-duty PMB) | per m² | 2,000 | 2,800 | — |
Additional cost drivers:
- Access restrictions: +10–20% for upper-floor units requiring pump or hoist delivery
- Night work: +15–30% for noise-permit shifts (common in Kwai Chung/Tsuen Wan)
- Phased handover: +5–15% for occupied factories needing partial operation
- Drainage and trench reinstatement: HK$400–900 per linear metre
For a 2,000 m² standard floor, the all-in budget lands at HK$2.4M–4.0M. For the same area in heavy-duty PMB, HK$4.0M–5.6M.
Vendor and Contractor Landscape in Hong Kong
Hong Kong has no domestic bitumen refinery; all binder is imported, primarily from Singapore, South Korea, and mainland China. This affects lead times and price volatility.
- Singapore: ~40–50% of Hong Kong's penetration-grade supply; 7–14 day shipping
- South Korea: PMB and CRMB grades; 10–18 day shipping
- Mainland China: cost-competitive pen grades; 3–7 day road freight via Shenzhen
- Middle East (UAE, Bahrain): bulk pen 60/70; 21–30 day shipping, used for large tenders
Contractor selection checklist:
- Valid Construction Industry Council (CIC) registration
- Proven experience with PMB mixes in ambient temperatures above 30°C
- On-site Marshall and coring test capability or a named third-party lab
- Disclosure of binder source and batch certificates (penetration, softening point, viscosity)
- Ability to mobilise within 14 days for urgent repaving
Local trade bodies such as the Hong Kong Construction Association (HKCA) and the Hong Kong Institution of Engineers (HKIE) publish guidance that contractors should be able to reference when specifying mix design.
FAQ
Q1: How much does factory floor paving bitumen cost per square metre in Hong Kong?
Standard bituminous factory flooring costs HK$1,200–HK$2,000 per square metre, while heavy-duty polymer-modified systems reach HK$2,000–HK$2,800 per square metre. A typical 2,000 m² floor therefore totals HK$2.4M–5.6M all-in.
Q2: How long does it take to pave a 2,000 m² factory floor?
Expect 7–12 working days from mobilisation to handover, assuming dry weather and unrestricted access. Add 2–3 days if substrate repair is extensive or the unit has restricted vehicle access.
Q3: What bitumen grade is best for Hong Kong's climate?
PMB 40 or PMB 76 with a softening point above 70°C is the correct choice for exposed or heavy-load bays. Standard Pen 60/70 should only be used on shaded internal floors with light wheel loads.
Q4: Can bitumen flooring handle forklift and container loads?
Yes — with a 50 mm base and 25 mm PMB wearing course, a properly compacted bituminous floor handles wheel loads above 50 kN/m². For very heavy container-handling equipment, specify PMB 76 and increase base thickness to 70–80 mm.
Q5: How soon can the floor be trafficked after paving?
Bitumen mats can typically be trafficked 4–8 hours after final compaction, compared to 14–28 days for rigid concrete. This makes bitumen the fastest option for occupied industrial premises with tight downtime windows.
Closing CTA
Before you commit to a contractor quote, run your project numbers through the 6Tar cost calculator. It converts your floor area, load class, bitumen grade, and access constraints into a HK$/m² estimate in under 60 seconds — including base and wearing course tonnage, binder volume, and a phase-by-phase schedule. Enter your site data now and compare at least three specification scenarios before you tender.