Menu

v26.03 March 2026

In the March 2026 revision of the Code of Practice the focus was heavily towards clarification with some substantial changes.

Important Revisions

Editing and rearrangement

Most editing and rearrangement for this update concentrated on clarifying and removing ambiguities throughout the Code of Practice. 

Revision Detail v26.03 - 2026 - March

CategoryClause Number (prior to update)Clause (As of current publication)Details
2 - Editing and rearrangement1Introduction New revision message for v26.03, published on 1 March 2026.
2 - Editing and rearrangement2.1Definitions Updated definition for Lap Tape.
3 - Substantial change to recommendation4.10.7Crevice Corrosion/Wet Storage Stain Added guidance for scaffolding support on roofing.
2 - Editing and rearrangement4.19.1Fastener Durability Edited for clarity. No changes to recommendations.
2 - Editing and rearrangement8.6Fastening Flashings Editing for clarity.
2 - Editing and rearrangement8.8Profile Closures Editing for grammar and clarity. No changes to recommendations.
1 - Minor Errata9.4.1.1Overflashed Backflashings Renamed clause, for linking purposes. 
2 - Editing and rearrangement9.4.2.6Penetration Flashings on Trapezoidal Profiles Updated the illustration to show the apron of the cricket covering the penetration apron.
1 - Minor Errata9.4.3Dormer Details Reformatting of Gable Dormer Valley: Corrugate. No other edits or changes to recommendations.
2 - Editing and rearrangement9.5.1Boot Flashings to an Over Flashing Replaced details drawing: Over-flashed Boot with Arrowhead Soaker on Trapezoidal Profile
0 - Clause Removed9.5.2Other Applications for Boot FlashingsRemoved empty clause.
3 - Substantial change to recommendation10.1Ventilation Pathways This clause and its sub-clauses have been substantially revised.
1 - Minor Errata10.10.1.1Soffit Vents Small layout fix.
2 - Editing and rearrangement10.10.1.2Fascia Vents This clause has been revised as part of the larger revision of Ventilation Pathways.
2 - Editing and rearrangement10.10.1.3Ridge Vents This clause has been revised as part of the overall revision of Ventilation Pathways.
1 - Minor Errata10.10.1.4Vented Soft Edge Spacing fixes.
2 - Editing and rearrangement10.10.2Battens This clause has been revised during the overall review of Ventilation Pathways and the drawings have been updated.
4 - Clause Inserted Clip Marking on Trough Sections New clause.
1 - Minor Errata15.4.7Sarking Text formatting.
2 - Editing and rearrangement15.4.12Canning and Purlin Creasing Revised definition (see Glossary ), and added a specifications for lap tape and HD tape as an alternative backer for tray roofing.
2 - Editing and rearrangement17.1.3.2Point Load Testing Removed wrongly placed image.
1 - Minor Errata17.1.5.2Interpreting UDL Load Results Typo Fix.
2 - Editing and rearrangement18Useful Tools Renamed the clause to Useful Information.
1 - Minor Errata18.5Geometry And Measurement Replaced some illustrations with better waulity ones. No changes to recommendations.
1 - Minor Errata18.6Velocities Removed superfluous captions.
1 - Minor Errata18.7Cricket Penetration Patterns Replaced copied drawings with original illustrations. No changes to recommendations.
1 - Minor Errata18.8Sheet Metal Work For Roofing Contractors. Replaced copied drawings with original illustrations. No changes to recommendations.
4 - Clause Inserted v26.03 March 2026 Revision detail for the update on 1 March 2026
(optional caption)
Clause: 
019_001_000_000_000_000_000_000_000
Clause Number: 
19.1
/cop/revision-history/v2603-march-2026
Revision Category: 
4 - Clause Inserted
Revision Detail: 

Revision detail for the update on 1 March 2026