Certificate III in Construction Waterproofing (CPC31420)
Wet area waterproofing, balconies, roofs, below-ground membranes, swimming pools, planter boxes.
Who is it for? Waterproofers and applicators with 3+ years on wet area and structural waterproofing.
RPL in 5 Simple Steps
Free RPL Suitability Enquiry
Discuss your skills, work history and experience with our team to determine whether RPL may be suitable for you. Eligible applicants are referred to a partnered RTO for enrolment.Enrolment & RPL Kit
The partnered RTO enrols you into the qualification or units and provides the RPL assessment kit, evidence guide and submission requirements.Evidence Collection & Submission
Gather and submit evidence of your skills and experience — resumes, employment documents, licences, references, work samples and previous training records. We can assist you with organising your evidence.Assessment & Review
The RTO assessor reviews your evidence and may conduct a competency conversation, workplace verification, practical assessment or request additional information if required.Outcome
The RTO determines the assessment outcome. Where competency requirements are met, the RTO issues the qualification or Statement of Attainment.90%
Graduate Satisfaction
Source: NCVER Student Outcomes (industry avg)
85%
Reported Work Status Improvement
Employment outcomes vary and are not guaranteed
$95k
Typical Median Earnings
Source: Seek / Indeed AU 2026
Qualification Description
CPC31420 — Official description from training.gov.au
This qualification is designed to meet the needs of workers who undertake waterproofing for residential and commercial construction work. The qualification has core unit of competency requirements that cover common skills for the construction industry, as well as the specialist field of work, construction waterproofing. Waterproofers apply membranes and special coatings to protect contents and the structural integrity of buildings.
Occupational titles may include:
- Waterproofer
State and territory jurisdictions may have different licensing, legislative, regulatory or certification requirements. Relevant state and territory regulatory authorities should be consulted to confirm those requirements.
Waterproofing is One of the Most Regulated Trades. The Cert is Non-Negotiable.
You can assist with waterproofing work as an employee, but to certify membrane systems, contract directly, or take responsibility for wet-area scope, CPC31420 is required by state regulators and head contractors alike.
Every wet area, every roof, every below-ground build needs a certified waterproofer. NSW, VIC and QLD all have specific requirements for waterproofing certification on building work. The supply of qualified contractors is thin. The pay reflects it.
Qualified Waterproofer (employed)
$70k–$90k / yr
Residential wet areas, balconies, basic membrane work. Award-rate band once your CPC31420 is current.
Commercial / Specialist Waterproofer
$85k–$110k / yr
Commercial membrane systems, roofs, below-ground. Per-job pricing, fewer competitors.
Waterproofing Project Lead
$95k–$125k / yr
Quote large jobs, coordinate with builders, certify systems. Senior role context.
Waterproofing Subcontractor
$130k–$200k+ / yr
Specialist subcontractor work. Highest-rate trade band in construction. The ticket is non-negotiable.
Specialist trades pay specialist money. Be the specialist.
REQUEST RPL SUITABILITY CHECK — Free →
Salary ranges sourced from Seek, Indeed and Payscale Australia (2026). Licensing thresholds vary by state and project value. Figures are typical full-time ranges and exclude superannuation unless noted.
You May Need To Provide Evidence Such As
- Photos of waterproofed wet areas, balconies, below-ground works
- References from builders, tilers, plumbers
- Pay slips or invoices showing waterproofing work
- Evidence of relevant Australian workplace experience, where required by the partner RTO
- White card + any membrane manufacturer certifications
- Supplier accounts (ARDEX, Sika, Mapei)
- Existing waterproofing licences from other states
FQ helps you understand what evidence may be requested before assessment by the partner RTO.
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