Current 26-gauge metal siding stock
Use the gauge for reference. Use millimetres for clarity.
The current identified stock is documented at 0.48 mm base-metal thickness and 0.52 mm total-coated thickness, with project availability confirmed before production.
- Base metal
- 0.48 mm BMT
- Total coated
- 0.52 mm TCT
- Current reference
- 26 gauge
The useful numbers
Gauge is shorthand. Thickness is the specification.
Gauge conventions can vary between product types and markets. The current Terrashield mill certificate removes that ambiguity by stating both the steel core and the finished coated thickness in millimetres.
Current identified stock
0.48 mm
Base-metal thickness
0.52 mm
Total-coated thickness
BMT
Steel core before metallic and paint coatings
TCT
Finished thickness including the coating layers
26 gauge
Current commercial shorthand for this stock
Lot specific
Values apply to the material identified by the certificate
Mill certificate scope
A material document answers material questions.
It does not turn a profiled sheet into a tested building assembly. Material traceability and project design remain separate responsibilities.
The current certificate states:
- Supplier-reported ASTM A792-AZ150 designation
- Supplier-reported 70% PVDF prepainted Galvalume
- 0.48 mm BMT and 0.52 mm TCT
- Listed coating and mechanical values
The project team still determines:
- Panel spans and structural design
- Subframing and fastening schedule
- Air, water, thermal, and fire performance
- Installation details and code compliance
Current quotation paths
Match the documented material to the current profile and coil width.
A gauge alone does not confirm that every finish and profile combination is on the floor. Terrashield checks the applicable coil, finish, width, quantity, and production schedule for each quotation.
Clear quotation language
Put the decimal thickness beside the gauge.
A useful request identifies the required material precisely and still includes the profile, finish, lengths, quantities, trims, location, and schedule that control production.
Example current-stock description
26-gauge prepainted Galvalume steel, 0.48 mm base-metal thickness and 0.52 mm total-coated thickness, with the applicable profile and finish confirmed by quotation.
This describes the current material. It does not replace the project specifications, engineering, approved wall or roof assembly, or installer-confirmed cut list.
26-gauge metal siding questions
Separate the material facts from the assembly claims.
Current stock is documented in millimetres and by certificate. Future lots, heavier materials, and project performance require separate confirmation.
How thick is the documented 26-gauge Core Series reference?
The Core material certificate lists 0.48 mm base-metal thickness and 0.52 mm total-coated thickness. Those values apply to that reference material, not every colour or future lot. Confirm decimal thickness with the selected coating and order.
What is the difference between BMT and TCT?
BMT means base-metal thickness before metallic and paint coatings. TCT means total-coated thickness after those layers are included. The documented 26-gauge Core Series reference is 0.48 mm BMT and 0.52 mm TCT; other materials are confirmed separately.
Does 26 gauge describe every future Terrashield coil?
No. The stated values describe the identified Core reference material. Other colour systems, gauges and lots need their own written confirmation before production.
Which current profiles use the documented 26-gauge stock?
Current quotation paths that list 26 gauge are TerraGroove 300, TerraLap 200, TerraCrest 100, and TerraCrest 200, subject to coil width, finish availability, profile compatibility, and the written project quotation.
Does the mill certificate provide a structural span or fire rating?
No. It documents the material values stated on the certificate. It does not establish panel spans, a fastening schedule, a tested wall or roof assembly, a fire rating, installed service life, or a project warranty.
Can 24-gauge or 22-gauge material be requested?
Yes. 22, 24 and 26 gauge are common steel selections, not our full material supply range. Other gauges and metal thicknesses can be requested. Provide the material, profile, required decimal thickness, quantity and finish so forming suitability and production can be confirmed in writing. The Core lot values on this page do not apply automatically to other materials.
Continue exploring
Use the material facts with the right profile and application path.
Need the current material quoted?
Send the profile, finish, decimal thickness requirement, lengths, quantities, and destination.
Terrashield will confirm the applicable material lot, manufacturing scope, production timing, and pickup or freight terms in writing.