STC rating of double glass sliding doors?

Wiz · **Posted:** Tue May 06, 2003 9:35 am

HI

I have looked but cant seem to find ....soo...

Does anyone know what the approx STC rating of running two sliding glass doors as per the SAE site, would be?

I understand they must be angled and such during construction, i am just curious on their sound isolation capabilites?

Thanks in advance

Peter

John Sayers · **Posted:** Tue May 06, 2003 10:18 am

Peter - the doors I used at left Bank had an STC of 33 each. Not sure what that makes them when added together. :wink:

cheers
john

Wiz · **Posted:** Tue May 06, 2003 2:54 pm

thanks john

Peter

knightfly · **Posted:** Thu May 08, 2003 9:11 pm

34. (hehehehehehe...)

Seriously, probably around STC 40-42. It would be nice if two STC 33 items made for STC 66, but alas... Steve

knightfly · **Posted:** Thu May 08, 2003 9:16 pm

34. (hehehehehehe...)

Seriously, probably around STC 40-42. It would be nice if two STC 33 items made for STC 66, but alas...

John, a very basic imperial test would be put a ghetto blaster in the control room, SLM at the doors, crank it to 90 dB with both doors open, close one door, measure, close the other door, ditto...

I did this once with a blaster and a refrigerator to see how good the magnetic seals were (I think I ended up testing the frig walls instead, worked out to 37 dB difference between door open, door closed)... Steve

OzNimbus · **Posted:** Mon May 19, 2003 1:05 am

Well, I can verify that 2 sliders really do the trick. We've had ours installed the last few weeks, and the work great. About the only thing they won't stop is the really low end on a bass drum. Don't get me wrong, they'll knock the bass down significantly, but you're still gonna get some transfer.

As for the hi and mids, no problem.

Michael Jones · **Posted:** Mon May 19, 2003 1:47 am

That's good to know Oz. I'm planning the same thing for my place.

John Sayers · **Posted:** Mon May 19, 2003 11:05 am

I posted this pic at HR so I might as well post it here:

these are the features to look for ina sliding glass door

cheers
john

danaudio · **Posted:** Mon Jun 30, 2003 11:02 am

I have strongly been considering using John`s ideas of sliding doors between my booths and my control room. I like the potential sight lines they offer.

What kind of doors are you all using? Are they standard sliding glass doors that one could get at home depot or are they super expensive acoustical doors?

Any info would be great!

danaudio · **Posted:** Mon Jun 30, 2003 11:03 am

I have strongly been considering using John`s ideas of sliding doors between my booths and my control room. I like the potential sight lines they offer.

What kind of doors are you all using? Are they standard sliding glass doors that one could get at home depot or are they super expensive acoustical doors?

Any info would be great!

John Sayers · **Posted:** Mon Jun 30, 2003 3:14 pm

check your door manufacturers locally - you may find that whilst they don't carry any acoustic doors in stock they may have one in the range. The doors at left bank were exactly that and were made in Brisbane to our size specs and transported down to us (70 miles or so)

cheers
john

OzNimbus · **Posted:** Mon Jun 30, 2003 3:48 pm

My doors got put thru the stress-today. I had a friend of mine from a local death-metal act come out and wail on the kit... while the rest of his band stood in the control room and watched me close the sliders.... They were picking thier jaws up from the floor because they couldn't belive the difference. There was some VERY minor leakage, but overall, I'm totally blown away by the isolation... and these weren't even acoustic sliders. Hell, we picked one up off of a "damaged" rack and got a $200 discount... turns out it was just missing a handle.

I love it when things get ecenomical!

danaudio · **Posted:** Mon Jun 30, 2003 4:38 pm

wow...so I can really get away with solid "normal" sliding doors? Life is good...especially since my drum booth is not even connected to my control room...it is on the far end of the studio. Also...the other booths that will be connected are primarily for vox, and horns/strings

AlexW · **Posted:** Tue Aug 12, 2003 9:50 am

I can vouch for the effectiveness of garden variety doors as well. Mine are separated by a pretty good offset air space (20 - 36 inches); but the effect is pretty stunning.

Alex

Xen Ochren · **Posted:** Thu Jul 21, 2011 9:55 pm

to resurrect an old thread,

wouldn't part of the problem be the STC rating of each individual door, not the rating of them combined?

Sure if you are only trying to reduce sound transmission between recording space and control room, but if you have a room inside a room, to reduce sound transmission to neighbours, wouldn't the doors become your weakest link?

ie you only need to build your walls to the same quality as your doors. If you built a wall with say, 2 layers of 16mm plasterboard and some green glue, much of this expense would be wasted as soon as you added sliding doors with an STC of 33 or similar? I am assuming this standard twin leaf design plus green glue offers at least 33 on its own. am I wrong?

I can't find anywhere that can tell me the stc of 16mm plasterboard, GG, 16mm plasterboard, alone. it all has another layer, maybe with an air gap.

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STC rating of double glass sliding doors?

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