I think I have to a disagree with your analysis. The verse is in a minor key judging by the looping riff. This is interrupted once in a while by a iv-v-i cadence, and then the verse continues. Then the build-up, which happens in the parallel key III: IV-V-VI-VI IV-V-III-III-III and then back to the minor key for the chorus.
Comments
I think I have to a disagree with your analysis. The verse is in a minor key judging by the looping riff. This is interrupted once in a while by a iv-v-i cadence, and then the verse continues. Then the build-up, which happens in the parallel key III: IV-V-VI-VI IV-V-III-III-III and then back to the minor key for the chorus.