Lots of foil insulation - used (Digbeth B5)

We have a lot of used foil insulation available. It's been stapled to a large roof, so has some staple holes and dusty on one side, but is very much useable. It's basically a slim rockwool type quilting sandwiched by foil on either side. Collection from Digbeth, you can have as much or as little as you like - but be warned it's a workplace so we're not around much at weekends.