Anthony,
As far as the ceiling of your shop goes, I would think that if you put in a drop ceiling and put the foam panels either on the outside of the ceiling or concealed inside the framework and covered with sheet rock or plywood would do the trick. However, I think it would work just as well to put the foam panels on the surface of the concrete slab, assuming you could figure out a way to attach them other than, say, with your hot glue gun. As someone pointed out, these panels absorb the sound, as much as provide a barrier. As far as the vibrations go, just tell those computer techys that you won't charge them for the periodic foot massages.
Regarding you question about putting chipboard under the machine, I just don't think it will make enough difference to warrant the work and expense. I think the carpet will work good enough on the floor, but if you were inclined to do something more than the carpet, I would buy the 3/4" sound board that's fairly common in hardware stores. It is sometimes referred to as fiberboard, but make sure that what you buy has some specific claim to sound proofing qualities. This would be fine on a floor covered by carpet, but would not be durable enough by itself. The other concern I would have is getting your machinery level on it. The weight of the machinery might crush it unevenly, so consider that idea with caution.
By the way, I have carpet on my shop floor, (but the legs of my machines and workbench are not on carpet). I started out using large pieces of carpet over those rubber fatigue mats for extra help on the concrete floor and found that they help keep the dust down a lot. Mainly because the dust sticks to them. They aren't as troublesome and hard to clean up as I guessed they would be, they make the floor warmer and not as hard on the joints. The best part is that when I drop my tools or work pieces, they suffer much less damage.
I don't know anything about the polycarbonate material you referred to for the windows, but I would love to know more about it.
Natalie
----- Original Message
-----
From: Anthony Christy
To: felder-woodworking@... ; dotcalm@...
Sent: Sunday, April 23, 2000 12:03 AM
Subject: Re: [felder-woodworking] Sound Proofing Materials
Dear Natalie,
I read your tips with great interest.
My shop is on the ground floor, downstairs from a computer college. The
building has double brick (cavity) walls, a extra reinforced concrete slab
(350mm thick) at 3.650m above the ground floor slab.
I've re-screeded the workshop floor and will have an old carpet to cover it
so as to dampen the reflected sound.
Unfortunately the slab above really transmits sound/vibrations quite
efficiently through itself. The windows (1m high) are set at 2.650m and go
up to the lower side of the slab, on the South side of the shop.
I have the dust collector on the outside of the South wall (in the car
park).
Do you think a suspended ceiling (of chip-board on battens) and something
similar on the walls would dampen the sound transmission?
Would a layer of chipboard under the machine help any?
As I have two airconditioner openings (and two very old airconditioning
units) to let air in, so I may put a layer of poly-carb over the windows (if
I can get enough air through the dust collection system).
Thanks for your input.
Anthony
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