I just thought of this while I watched a sandbag being positioned over an airbrick on a Look North article;
Can you tell what it is yet…?
A box shape is wedged (think chair under a door handle) around an airbrick – the cavity is filled with a waterproof foam that sets to perfectly seal, should come off with a wire brush or a solvent….
Is there such a thing? I’ve called it ‘setting foam seal’
– update –
…seen it with my own eyes, but I love lamb chops :-d