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My question is, would corners filled with triangles at 300x300x420mm (11.75x11.75x16.5") be effective for low end absorbtion? I see the sizes quoted in this thread are using larger triangles but my dimensions are based on using 1200x600mm slabs of insulation (8 triangles).
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It will work, but just keep in mind that it will not work as well and if that is the best you can do then GO FOR IT. But without lab testing there really is no way to tell you how affective it will be.
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My room dimensions were posted in this thread and so far I've constructed 4 traps for the walls (1200x600x100mm). Also, slightly off-topic sorry, but these 4 traps will currently sit 25mm off the wall - is that gap better than nothing or would they be better off flush to the wall if a bigger gap isn't possible?
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Once again hard to tell without testing, but I would think you would be fine if you had to space it. It may help a little but I doubt it is going to a HUGE difference one way or another.
Glenn