noisy powertools

[Hugh Ashworth]

Hope you can help.
My neighbour, a keen woodworker, is driving me crazy with his power tools. (Table saw, belt sander, planer/thicknesser).
His double garage of brick plastered walls, has double metal roll-up doors which face my property. The place is like a cave, throwing the sound my way. No ceiling.
Rather than legally close him down, I want to suggest sound-proofing his garage -- to which cost I will contribute. Any suggestions ?