The ProQual Level 3 NVQ Diploma in Testing, Inspecting and Thorough Examination Occupations – Leak Detection in Waterproof Systems is a specialist qualification designed for professionals working in the construction, roofing, and waterproofing industries who are responsible for the detection, inspection, and reporting of leaks in waterproof systems. This Ofqual-regulated diploma provides formal recognition of a worker’s competence in conducting accurate and compliant leak detection using industry-approved methods, technologies, and safety procedures.
As waterproofing systems become increasingly complex in modern construction—particularly in roofing, basements, podium decks, green roofs, and sub-structures—leak detection plays a vital role in ensuring building integrity, safety, and durability. This Level 3 NVQ is tailored to those involved in non-destructive testing (NDT) and the thorough examination of membrane integrity, helping professionals meet industry standards and legal responsibilities.
The course is work-based and fully assessment-driven, meaning learners are evaluated through real-world on-site tasks rather than traditional classroom exams. This qualification is ideal for leak detection technicians, waterproofing specialists, site inspectors, and professionals involved in quality control and post-installation testing.
By achieving this qualification, candidates demonstrate their ability to work safely, interpret technical data, and detect and diagnose water ingress issues in a wide range of waterproofing systems — making this diploma a powerful tool for career development, compliance assurance, and professional recognition.
ProQual Level 3 NVQ Diploma in Testing, Inspecting and Thorough Examination Occupations: Leak Detection in Waterproof Systems
The ProQual Level 3 NVQ Diploma in Testing, Inspecting and Thorough Examination Occupations: Leak Detection in Waterproof Systems qualification consists of 6 mandatory units required for completion.
Mandatory Units
| Units: | Title |
| 1 | Confirming work activities and resources for an occupational area in the workplace |
| 2 | Developing and maintaining good occupational working relationships in the workplace |
| 3 | Confirming the occupational method of work in the workplace |
| 4 | Detecting breaches in waterproofing systems using non- destructive leak detection in the workplace |
GLH (Guided Learning Hours) and TQT (Total Qualification Time) are terms commonly used in vocational qualifications to help define the amount of time a learner is expected to spend on their studies.
1. GLH (Guided Learning Hours)
GLH refers to the number of hours a learner spends being directly taught, supervised, or supported during their course. This includes the time spent in activities such as:
- Classroom instruction
- Practical workshops
- One-on-one tutoring or mentoring sessions
- Online learning sessions with tutor support
In other words, GLH represents the time that learners are actively engaged with their instructors or learning activities.
2. TQT (Total Qualification Time)
TQT represents the total amount of time a learner is expected to invest in completing a qualification, including:
- GLH (Guided Learning Hours): Time spent on direct learning, as explained above.
- Self-Directed Learning: This includes time spent on independent study, research, assignment completion, preparation for exams, and any other work the learner does outside of direct teaching hours.
TQT is a broader measure that includes all the time required to achieve the qualification. It helps learners and employers understand the overall commitment required for the qualification.
Key Differences Between GLH and TQT:
- GLH focuses on direct learning with guidance or supervision.
- TQT includes GLH as well as independent study time and other learning-related activities.
Example:
If a qualification has a TQT of 600 hours and a GLH of 250 hours, it means the learner should spend 250 hours in direct learning (classroom, online, or tutor-led sessions) and 350 hours on independent study or research.
Upon completing the ProQual Level 3 NVQ Diploma in Testing, Inspecting and Thorough Examination Occupations: Leak Detection in Waterproof Systems students will be able to:
Confirming work activities and resources for an occupational work area in the workplace
- Identify work activities, assess required resources and plan the sequence of work.
- Obtain clarification and advice where the resources required are not available.
- Evaluate the work activities and the requirements of any significant external factors against the project requirements.
- Identify work activities which influence each other and make the best use of the resources available.
- Identify changed circumstances that require alterations to the work programme and justify them to decision makers.
Developing and maintaining good occupational working relationships in the workplace
- Develop, maintain and encourage working relationships to promote good will and trust.
- Inform relevant people about work activities in an appropriate level of detail, with the appropriate level of urgency.
- Offer advice and help to relevant people about work activities and encourage questions/requests for clarification and comments.
- Clarify proposals with relevant people and discuss alternative suggestions.
- Resolve differences of opinion in ways that minimise offence and maintain goodwill, trust and respect.
Confirming the occupational method of work in the workplace
- Assess available project data accurately to determine the occupational method of work.
- Obtain additional information from alternative sources in cases where the available project data is insufficient.
- Identify work methods that will make best use of resources and meet project, statutory and contractual requirements.
- Confirm and communicate the selected work method to relevant personnel.
Detecting breaches in waterproofing systems using non-destructive leak detection in the workplace
- Interpret the given information relating to the work and resources when detecting breaches in waterproofing systems using non-destructive leak detection.
- Know how to comply with relevant legislation and official guidance when detecting breaches in waterproofing systems using non-destructive leak detection.
- Maintain safe and healthy working practices when detecting breaches in waterproofing systems using non-destructive leak detection.
- Select the required quantity and quality of resources for the methods of work when detecting breaches in waterproofing systems using non-destructive leak detection.
- Minimise the risk of damage to the work and surrounding area when detecting breaches in waterproofing systems using nondestructive leak detection.
- Complete the work within the allocated time when detecting breaches in waterproofing systems using non-destructive leak detection.
- Comply with the given contract information when detecting breaches in waterproofing systems using non-destructive leak detection.
Benefits of the ProQual Level 3 NVQ Diploma in Testing, Inspecting and Thorough Examination Occupations: Leak Detection in Waterproof Systems
The ProQual Level 3 NVQ Diploma in Leak Detection in Waterproof Systems offers significant professional, practical, and regulatory benefits for individuals working in waterproofing, roofing, and construction inspection. This industry-recognized qualification not only strengthens your technical ability but also confirms your on-site competence in leak detection and membrane integrity testing, supporting safer construction practices and higher quality standards.
1. Nationally Recognized Qualification
This diploma is regulated by Ofqual and awarded by ProQual, making it a trusted and credible qualification across the UK construction and waterproofing sectors. It validates your professional expertise and aligns with current regulatory and client expectations.
2. Professional Recognition for Leak Detection Specialists
Completing this qualification provides formal recognition for leak detection professionals and waterproofing technicians. It demonstrates your ability to conduct accurate inspections, detect faults, and ensure compliance in waterproofing systems on-site.
3. Pathway to CSCS Gold Card
This NVQ is an approved route to obtaining the CSCS Gold Skilled Worker Card (Supervisor level), which is essential for accessing major UK construction sites and progressing into higher-responsibility roles.
4. Improved Job Opportunities and Career Progression
The skills certified in this course are in demand across commercial, industrial, and residential construction. This diploma helps you qualify for roles such as:
- Leak Detection Technician
- Waterproofing System Inspector
- Quality Control Supervisor
- Flat Roofing or Podium Deck Specialist
- Technical Advisor for Waterproofing Products
5. Enhances On-Site Health, Safety, and Compliance
This qualification ensures you understand and apply key safety procedures, testing protocols, and reporting practices—reducing the risk of hidden defects, structural damage, and costly repairs due to undetected water ingress.
6. Work-Based, Flexible Assessment
No exams or classroom attendance are required. Assessment is conducted in your actual work environment, allowing you to earn while you learn. You’ll be evaluated through on-site observation, portfolio evidence, and professional discussion.
7. Confidence in Using Advanced Testing Equipment
The course improves your practical capability in operating leak detection technologies such as:
- Electronic leak detection (ELD)
- Differential pressure and vacuum testing
- Flood testing and water spray tests
- Tracer gas and infrared scanning
This helps you stay updated with the latest tools and techniques used in the waterproofing industry.
8. Higher Standards in Quality Control and Risk Prevention
Qualified professionals play a crucial role in reducing long-term building maintenance costs, ensuring water-tightness, and meeting performance warranties. Your contribution adds value to clients, contractors, and property developers.
9. Cross-Industry Application
Skills gained from this NVQ are applicable across a variety of sectors, including:
- Flat roofing and green roof construction
- Basement tanking and podium decks
- Civil engineering and infrastructure waterproofing
- Industrial and commercial waterproofing projects
The ProQual Level 3 NVQ Diploma in Leak Detection in Waterproof Systems is specifically designed for skilled professionals involved in the inspection, testing, and verification of waterproofing systems in construction environments. This qualification is tailored to those who play a critical role in detecting water ingress, identifying membrane failures, and ensuring structural integrity through non-destructive testing (NDT) methods.
This NVQ is suitable for individuals who already have on-site experience in leak detection or waterproofing and are looking to gain formal recognition for their skills, enhance their career progression, or qualify for supervisory positions.
✅ Leak Detection Technicians
Ideal for professionals already working with electronic leak detection, flood testing, or other advanced techniques to identify leaks in flat roofs, green roofs, basements, podium decks, or waterproof membranes.
✅ Waterproofing and Roofing Specialists
Those involved in the installation, maintenance, or post-installation inspection of waterproof systems who want to demonstrate their competence and expand into inspection or quality assurance roles.
✅ Construction Quality Control Officers
Individuals responsible for monitoring installation standards, conducting post-installation inspections, and ensuring construction projects meet warranty and safety requirements for waterproofing.
✅ Building Envelope Inspectors and Surveyors
Technical staff and site inspectors involved in identifying defects in building exteriors, particularly in regard to water ingress and membrane performance, will benefit from formalizing their inspection capabilities.
✅ Maintenance and Facilities Engineers
Professionals managing large buildings or infrastructure projects where regular waterproofing integrity checks are required to maintain safety and compliance over time.
✅ Health & Safety and Compliance Personnel
Those working in health and safety or construction compliance who need to understand leak detection procedures, testing regulations, and best practices to ensure safe, water-tight builds.
✅ Construction Professionals Seeking CSCS Gold Card
Experienced workers aiming to progress into higher-level roles or qualify for the CSCS Gold Skilled Worker Card will find this NVQ provides the right recognition and pathway.
✅ Individuals Transitioning into Technical Inspection Roles
If you’re moving from a general construction or roofing role into a more specialized technical position, this qualification provides the knowledge and credentials to make that transition successfully.
Entry Requirements
To enroll in the ProQual Level 3 NVQ Diploma in Leak Detection in Waterproof Systems, learners should meet specific entry criteria to ensure they are prepared to complete the qualification successfully. These requirements reflect the technical and practical nature of the course and are aligned with UK construction industry standards.
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Qualification Process
Qualification Process for the ProQual Level 3 NVQ Diploma in Testing, Inspecting and Thorough Examination Occupations: Leak Detection in Waterproof Systems
- Self-Assessment:
Begin by evaluating your eligibility to ensure you meet the qualification requirements, including work experience, knowledge, and language proficiency. - Registration:
Complete your registration by submitting the required documents, including a scanned copy of a valid ID, and paying the registration fee. - Induction:
An assessor will conduct an induction to confirm your eligibility for the course and explain the evidence requirements. If you do not meet the criteria, your registration will be canceled, and the fee will be refunded. - Assignmnets & Evidence Submission:
Provide all assignmnets and the necessary evidence based on the assessment criteria outlined in the course. If you are unsure of the required evidence, consult with the assessor for guidance on the type and nature of evidence needed. - Feedback and Revision:
The assessor will review your submitted evidence and provide feedback. Evidence that meets the criteria will be marked as “Criteria Met,” while any gaps will be identified. You will be asked to revise and resubmit if needed. - Competence Evidence:
Submit final evidence demonstrating that all learning outcomes have been met. This evidence will be marked as “Criteria Met” by the assessor once it is satisfactory. - Internal Quality Assurance (IQA):
The Internal Quality Assurance Verifier (IQA) will review your evidence to ensure consistency, quality, and compliance with standards. - External Verification:
The IQA will submit your portfolio to ProQual’s External Quality Assurance Verifiers (EQA) for final confirmation. The EQA may contact you directly to verify the authenticity of your evidence. - Certification:
Upon successful completion of all checks, ProQual will issue your official certificate, confirming that you have attained the ProQual Level 3 NVQ Diploma in Testing, Inspecting and Thorough Examination Occupations: Leak Detection in Waterproof Systems.
