A roof is a demanding place. A normal summer day can see over 100F rise and fall in temperature. On metal, this 100F change can happen in less than a minute in a rain storm. For standing seam roofs with panel straps, this pummeling manifests in failure at the seal at the strap. Ron Hart, President of Hart Consulting Group, saw this immediately.
“Water penetrates or is wicked into the seam. Then it freezes and the expanding ice further pulls the seam apart. And simple heat expansion and contraction can force the leak,” says Hart.