Material Decay Benchmarks That Outlive Your Carbon Credit Cycle
Carbon credits don't age like wood does. A five-year crediting cycle can feel like a blink, but the wooden beams in your building project are slowly losing mass the whole time. The concrete columns are carbonating. The steel rebar is rusting, quietly. If your decay benchmarks were set on day one and never revisited, you're likely carrying numbers that stopped being true around year two. So here's the question that matters: which decay benchmarks can you trust to outlast your credit cycle? And more importantly, how do you choose them before the clock runs out? This article lays out the decision, the options, and the trade-offs—no fluff, just the math and the management. Who's Making This Call, and Why the Deadline Is Already Here The cast of decision-makers: project developers, EPCs, verifiers, and financiers Four groups hold pieces of this call, and none of them can afford to sit it out. Project developers pick the benchmark that feeds their carbon model. EPCs—engineering, procurement, and construction firms—sit on the material data that actually justifies it. Verifiers audit the logic, and financiers underwrite the credit stream that depends on both. If any one of them drags, the whole chain wobbles. I have