
Line Marking Bunbury WA
Industrial Estate, Port & Commercial Marking
Professional line marking in Bunbury WA. MRWA approved. South-West WA hub, Davenport Industrial Estate, port-adjacent. Crushed limestone sub-base pH leaching assessment for thin asphalt carparks. 48hr quote.
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Crushed Limestone Sub-Base Under Thin Asphalt Can Leach High pH Through to the Surface
A Bunbury industrial estate carpark had been constructed with a crushed limestone sub-base — locally sourced Tamala limestone, the standard road-base material throughout the South West WA region. The asphalt wearing course was approximately 40mm thick over the limestone. We primed and marked normally.
Primer adhesion in the lower-lying sections of the carpark was noticeably lower on pull-off testing — around 1.0-1.2 MPa rather than the expected 1.6 MPa. Moisture testing showed slightly elevated moisture content in those zones. Investigation: crushed limestone has a naturally high pH (9-11) from the calcium carbonate content, and moisture from rainfall had carried alkaline leachate upward through the thin asphalt into the surface layer. The alkaline leachate was disrupting the amine epoxy curing mechanism at the surface, identical in effect to lime stabilisation on asphalt.
For thin asphalt over limestone sub-base, the pH of the asphalt surface should be tested — particularly in lower-lying zones where water collects and leachate concentrates. If pH is above 9, a phosphoric acid neutralisation of the surface before priming resolves the issue. In Bunbury and the South West WA region, crushed limestone sub-base is ubiquitous. It's a routine check, not a rare scenario.
Bunbury is Western Australia's third largest city and the South West's industrial hub — Davenport Industrial Estate, Strickland Street, and the port-adjacent businesses. MRWA approved.
Key Benefits
MRWA approved
Limestone sub-base pH leaching assessment
South-West WA industrial specialists
WorkSafe WA notice response

Line Marking Services in Bunbury Bunbury WA
Industrial estate and port-adjacent carpark marking, crushed limestone sub-base pH leaching assessment, warehouse floor marking, and road marking across Bunbury and the South-West WA Davenport Industrial corridor. Australind, Eaton, Dalyellup, Usher, Glen Iris, and Carey Park also covered. MRWA approved. Asphalt surface pH tested in lower-lying zones of any Bunbury thin-asphalt carpark over limestone sub-base before primer is applied.

Carpark Line Marking
AS/NZS 2890 compliant bays, accessible parking at proper 3.2m widths in Bunbury WA. Most projects done over weekends so you stay open.

Warehouse & Factory Marking
Forklift lanes, pedestrian walkways, hazard zones in Bunbury WA. Two-pack epoxy for high-traffic areas. Scheduled for zero downtime.

Road & Traffic Line Marking
Centre lines, crossings, stop bars in Bunbury WA. AS 1742 compliant. VicRoads approved. Thermoplastic lasts 5-8 years, not 18 months.

Line Marking Removal
Complete removal using grinding or 3500 PSI water blasting in Bunbury WA. No ghost lines bleeding through your new layout.

Playground & Sports Court Marking
Courts, games, hopscotch in Bunbury WA. 12 standard colours or custom matched to your school. Done during holidays, not term time.

Thermoplastic Markings
When paint needs replacing every 18 months, thermoplastic keeps performing for years in Bunbury WA.

Factory Floor line Marking
Professional factory floor marking for 5S lean manufacturing, and machine areas in Bunbury WA. Chemical-resistant epoxy options. WHS compliant. Upload plans for quote.

School Playground Line Marking
Professional school playground line marking across Bunbury WA. Games, sports zones, play areas, educational markings. Upload plans for detailed quote today.

Airport Line Marking
Specialist airport line marking to CASA Part 139 MOS standards in Bunbury WA. Runways, taxiways, aprons, and airside roads. ASIC cleared crews. Upload plans for quote.
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Frequently Asked Questions
Yes. Bunbury Davenport Industrial Estate and South-West WA commercial carparks are part of our regional WA schedule. Crushed limestone sub-base pH leaching assessment for all thin-asphalt carparks. We've completed 5,000+ projects nationally since 2009 and carry $20M public liability insurance. Every Bunbury quote includes a site assessment, surface condition report, and fixed pricing. No estimates that change at invoicing. For WorkSafe WA improvement notices we can typically assess within 24 hours and deploy within 48-72 hours. Completion comes with photo documentation, a compliance statement, and material specifications. MRWA approved for any road or carpark marking that requires local council or state road authority sign-off.
Tamala limestone is the predominant bedrock material throughout the Swan Coastal Plain and South West WA. It's abundant, cheap, and easy to crush for road sub-base. Virtually all road and carpark construction in Bunbury uses crushed limestone sub-base. The high calcium carbonate content gives it naturally high pH. Line Marking Australia has been completing marking across Bunbury and surrounds since 2009, with 5,000+ projects nationally. We carry $20M public liability and $10M professional indemnity insurance, MRWA approved. Every job comes with fixed pricing, photo completion documentation, compliance certification, and material specifications. Upload your site plans at linemarkingaustralia.com.au for a detailed quote within 48 hours, or call Niel Bennet on 0417 460 236 for urgent jobs.
Lower-lying zones concentrate moisture — rainfall collects there and the alkaline leachate path from sub-base to surface is more active. But pH leaching can occur throughout a thin-asphalt carpark over limestone. We test across the full carpark and note where pH readings are elevated, not just in the obvious low points. Line Marking Australia has been completing marking across Bunbury and surrounds since 2009, with 5,000+ projects nationally. We carry $20M public liability and $10M professional indemnity insurance, MRWA approved. Every job comes with fixed pricing, photo completion documentation, compliance certification, and material specifications. Upload your site plans at linemarkingaustralia.com.au for a detailed quote within 48 hours, or call Niel Bennet on 0417 460 236 for urgent jobs.
Generally below 60mm wearing course over un-stabilised limestone. At 100mm or above, the asphalt provides enough buffer that limestone leachate doesn't reach the surface in significant concentrations. Bunbury industrial estate carparks often have 40-50mm wearing course over limestone sub-base — below the buffer threshold. Line Marking Australia has been completing marking across Bunbury and surrounds since 2009, with 5,000+ projects nationally. We carry $20M public liability and $10M professional indemnity insurance, MRWA approved. Every job comes with fixed pricing, photo completion documentation, compliance certification, and material specifications. Upload your site plans at linemarkingaustralia.com.au for a detailed quote within 48 hours, or call Niel Bennet on 0417 460 236 for urgent jobs.
Main Roads WA approved since 2009. Approval means we meet the contractor qualification, insurance, and technical standards required to work on state roads and local government road networks. We carry $20M public liability and $10M professional indemnity coverage, which your risk manager or procurement team can request in writing. All road marking work in Bunbury is done to AS 1742.3 traffic control standards with retroreflective thermoplastic to AS/NZS 1906.3. Traffic management plans are provided before every job. You receive as-built completion photos, a compliance statement, and material certification on completion. We also cover Australind, Eaton, Dalyellup on the same schedule.
Line Marking Near Bunbury
We cover the South-West WA industrial and commercial corridor.
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Line Marking Guides for Bunbury WA
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Read guideAS/NZS 2890.1: Complete Guide to Carpark Standards
Bay dimensions, aisle widths, and accessible parking requirements every facility manager needs to know.
Read guideReady to Get Your Line Marking Sorted?
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