shallow focus photo of roof

Fixing internal condensation‑caused patch failure in inverted membrane roofs

First off, nobody really tells you that a roof can sweat from the inside out. Not rain. Not leaks. Just… ghostwater. And then things go pear-shaped. See, in an inverted membrane roof — which sounds fancier than it is — the waterproofing layer’s beneath the insulation. Upside-down cakes are fine. Upside-down waterproofing… gets sticky. Or…

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