The ever circular question of insulation?

[Airthies]

I've got a 4m off cut (similar to the link) of layered foil insulation I've been given was thinking of getting the equivalent from screwfix to do the rest.

I know theres 101 ways to insulate vans but is there anything I should consider if using this?
http://www.screwfix.com/p/ybs-superquil ... x-5m/80967

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