ToolsAsbestosRegulatory Compliance

NNLW Decision Tool

Determine whether asbestos work is licensed, NNLW, or non-licensed based on material type, work type, condition, and duration. CAR 2012 guidance.

Last updated 3 March 2026

About this tool

Determine whether planned asbestos work is likely to be licensed, Notifiable Non-Licensed Work (NNLW), or non-licensed non-notifiable based on the material type, type of work, material condition, and expected duration. This tool provides general guidance based on CAR 2012 and HSE published guidance.

How to use

Select the asbestos material type, type of work planned, current condition of the material, and expected duration. Click Evaluate to see the classification. The tool shows the likely work category, key requirements, and relevant regulations. Always confirm the classification with a competent risk assessment.

Important disclaimer

This tool provides general guidance only and is not a substitute for a competent risk assessment by a suitably qualified person. The classification of asbestos work depends on many site-specific factors that cannot be captured by a simple decision tool. When there is any doubt about the work category, always treat it as the higher risk category. The duty holder is responsible for ensuring the correct classification is applied.

Reference

Control of Asbestos Regulations 2012 (CAR 2012); HSE guidance INDG223 — Managing and working with asbestos; L143 — Managing and working with asbestos: Approved Code of Practice and guidance; HSE Asbestos Essentials task sheets.

Revision history

3 March 2026: Initial release.

Disclaimer

This tool is provided for educational and general information purposes only. It is not a substitute for professional engineering advice, design or verification.

Diggy and its contributors are not licensed engineering consultants and no results generated by this tool should be used directly for construction, design or safety-critical decisions.

All values and outputs are based on published empirical correlations and should be independently checked and confirmed by a qualified geotechnical engineer before use.

By using this tool, you accept full responsibility for how you interpret and apply the information provided.

Spotted an error? Let us know.

Asbestos material type

Type of work

Material condition

Expected duration