| R13 insulation: what to do? spray glue down? [message #71747] |
Wed, 14 March 2012 05:41  |
Maxjr
Messages: 57
Registered: August 2011
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Baron |
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I'm coming through the home stretch of my 4Pi build. I have crossovers coming from Wayne in the next week and just finished mounting the baffle, port, and all 4 sides. Prior to gluing up the rear panel, I'd like to install the braces and R13 insulation. Does this sound like the correct sequence?
My main question is: do I spray the R13 insulation with glue prior to installing it so it doesn't fall, or is the material rigid enough to stay put? I was also thinking of misting a light spray of glue on the other side of the R13 (non wood side) to prevent loose fibers from flying around. Will this affect performance if I do it lightly? If glue is recommended, is there a specific one? I was thinking of using 3M.
Lastly, I'd like to mount the crossovers in the cabinet on the bottom panel. Is it recommended to screw them down with shower liner in between (as a gasket). Can I then lay the R13 over the crossover?
I've read through the plans and many builds here, but haven't seen these specific issues addressed. Thanks in advance, Wayne and everyone else!
Cheers,
Joel
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| Re: R13 insulation: what to do? spray glued down? [message #71771 is a reply to message #71758] |
Wed, 14 March 2012 16:17  |
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Wayne Parham
Messages: 18792
Registered: January 2001
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Illuminati (33rd Degree) |
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Yes, that's the stuff. Just good old Elmer's white glue. You can also use yellow wood glue, which is very similar.
You can install the insulation now, but do be sure to think about where you will run your wires. The wire going from the amplifier connector will go through the back sheet of insulation, and the internal wire going from the crossover board to the tweeter will go through the sheet of insulation sitting on your cross-brace.
I like to mount the crossover board to the inside bottom with screws. Make a gasket with cardboard or PVC and put it under the crossover board. That will prevent it from buzzing at high volume levels. I've never actually found that to be a problem, but a gasket surely doesn't hurt.
Your speaker doesn't have insulation on the bottom - yours is on the top. But most models have insulation on the bottom. In that case, I like to mount the crossover before installing the insulation. I cut an access flap into the bottom insulation sheet, like shown below. I only apply glue around the perimeter, so the center flap can be lifted up to mount the crossover board, and to service it if that's ever necessary.
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