[Hakka]

pic 1
Here's the duct board, its been cut to 100mm x 60mm sheets. It is the 25mm high density duct board

pic 2
The duct board is wrapped in polyester batting to stop particles becoming airborne. Cut the batting to a size about 12 inces longer and 12 inches wider than the duct board.

pic 3
Use Caulk to attach it to the foil side of the duct board.

pic 4
I made the frame from 42mm x 18mm timber. I used some masonite packing sheets from work for the backboard. Run a bead of Caulk around the frame where it meets the backboard to stop it rattling/buzzing. Screw it all together.

pic 5
Almost finished, I used Caulk to stick the panels into the frames. They just ned to be covered in acoustically transparent material. I will post a fial pic when I get them covered.

Harry.