What Is the Difference Between BMT and TCT in Roofing Quotations?
PPGI.LTD explains the difference between BMT and TCT so buyers can compare roofing quotations on the same basis. BMT is the steel core. TCT is the full coated build.
Difference Between BMT and TCT: What Does Each Include?
The measurement boundary changes the meaning of the number.
BMTBase steel onlyCore thickness
TCTSteel plus coatingsFinished thickness
The prepainted metal guide shows why the substrate and coating layers belong to one finished product.
Why the Basis Changes the Quote
One nominal number can contain a different amount of base steel.
Coil weightThe steel basis affects material per square metre.
Coil lengthA fixed coil weight can give a different calculated length.
Design dataUse the same thickness basis as the approved data.
This is one reason PPGI prices can differ for products that look similar.
Confirm Four Fields Before Price Comparison
PPGI.LTD can quote more clearly when every offer uses one basis.
01BMT or TCT
02Nominal Value
03Standard
04Tolerance
Buyer benefitFairer quote comparison and a clearer final PO.
After the basis is fixed, use the roofing sheet thickness guide to review profile geometry, support spacing, steel grade, and design loads.
Buyer Concern & FAQ
Does TCT Include the Metallic Coating and Paint?
Yes. TCT normally covers the complete coated build. Confirm the contract definition.
Which Thickness Basis Should Be Used in a Quotation?
Use the basis required by the product standard and approved project data. State BMT or TCT clearly.
What Should I Check Before Comparing Two Roofing Quotes?
Check the thickness basis, nominal value, tolerance, steel grade, coating, profile, width, and order scope.
