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Post by superace on Jul 14, 2021 1:56:26 GMT
I have a few rolls of 48 x 16 x 1 denim insulation. Obviously an inch isn't big enough for a panel. I want to make a thicker panel about 4 inches. Do I need to glue the panels together or can I just be lazy and stack them on top of each other? Does it make a difference?
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Post by Hexspa on Jul 14, 2021 3:53:07 GMT
A little spray glue is ok; not too much. You can stack em but make sure they don't compress. I think that four 1" stacked should be fine. For my fluffy, I separated each R19 (or whatever I used) layer. That's maybe 6".
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Post by rock on Jul 14, 2021 12:49:50 GMT
A little spray glue won't hurt but if you are making a wood frame with breathable material covering around the front, sides and back, I can't imagine why you'd need any glue at all.
BTW, with your wood frame, it's good idea to cut holes or slots on the sides to allow some absorption on the sides and top/bottom to increase the total exposed absorptive surface area.
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Post by superace on Jul 15, 2021 4:25:16 GMT
Thanks for the tips! I am using a frame that I could cut some of the back out of. That's a fantastic idea!
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Post by rock on Jul 15, 2021 13:00:59 GMT
It's better if the frame is "open" on the back too. That means only covered with breathable material. This way, if you choose to mount it spaced from the wall, you will benefit by getting lower LF performance. A solid back will block and reflect sound passing through the absorber so any spacing won't help. When the back is open, sound will reflect off the wall back into the absorber so when spaced, the apparent absorber thickness is greater.
I understand your frame is 4" thick. The sides are where you should put holes; about 2" dia. or wide. If you search the forum, some members have posted pictures.
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