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Sound Reinforcement - Forums for Live Sound Professionals - Your Displayed Name Must Be Your Real Full Name To Post In The Live Sound Forums => Installed Sound/Contracting => Topic started by: Gary Fitzpatrick on January 12, 2018, 01:20:09 pm

Title: Dampness in House of Worship
Post by: Gary Fitzpatrick on January 12, 2018, 01:20:09 pm
I have been tasked to deal with a recurring problem in a chapel close to me. There are three XLR sockets located on a small step up to the main sanctuary part of the church. One of these sockets seems to suffer from rising damp. About three years ago I covered the solder connectors on the socket with "Wonder Gel" (http://www.raytech.it/product/low-voltage/wonder-gel?lang=en). This insulating gel cured the problem, but it is back again, despite the gel. Is there any other solution for insulating the connectors on the back of the xlr faceplate?

Title: Re: Dampness in House of Worship
Post by: David Allred on January 12, 2018, 01:24:30 pm
I have been tasked to deal with a recurring problem in a chapel close to me. There are three XLR sockets located on a small step up to the main sanctuary part of the church. One of these sockets seems to suffer from rising damp. About three years ago I covered the solder connectors on the socket with "Wonder Gel" (http://www.raytech.it/product/low-voltage/wonder-gel?lang=en). This insulating gel cured the problem, but it is back again, despite the gel. Is there any other solution for insulating the connectors on the back of the xlr faceplate?

Is it in a plenum or directly exposed to conditioned cold air that might cause temp differential and condensation?
Title: Re: Dampness in House of Worship
Post by: Gary Fitzpatrick on January 12, 2018, 02:11:32 pm
Itís sunk directly into the concrete floor. Cables are run inside buried conduit.

Chapel is only heated for two hours per day which is adding to the problem


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Title: Re: Dampness in House of Worship
Post by: Adam Kane on January 12, 2018, 04:40:26 pm
Itís sunk directly into the concrete floor. Cables are run inside buried conduit.

Chapel is only heated for two hours per day which is adding to the problem


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The condensation is coming inside the conduit...which is pretty common. Try closing the end of the conduit off with expanding foam or silicone. Makes it a bit of a pain to pull additional wiring through later, but helps keep the moisture out of the box.
Title: Re: Dampness in House of Worship
Post by: Gary Fitzpatrick on January 13, 2018, 05:35:44 am
That would make sense. Yea I will try that. I wonít be pulling any cables anytime soon so it doesnít bother me


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Title: Re: Dampness in House of Worship
Post by: Joseph D. Macry on January 19, 2018, 10:34:08 am
Itís sunk directly into the concrete floor. Cables are run inside buried conduit.

I would suspect there is standing water inside the underground conduit. Can sometimes be cleaned out with a shop vac, but hard to get a good seal with cable in the way.
Title: Re: Dampness in House of Worship
Post by: Scott Holtzman on January 19, 2018, 10:51:57 am
I would suspect there is standing water inside the underground conduit. Can sometimes be cleaned out with a shop vac, but hard to get a good seal with cable in the way.

I would blow it out with a compressor rather than try and suck it out.
Title: Re: Dampness in House of Worship
Post by: Rob Spence on January 19, 2018, 02:05:31 pm
I would blow it out with a compressor rather than try and suck it out.
I would check the other end to see where the water will spray


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Title: Re: Dampness in House of Worship
Post by: Scott Holtzman on January 19, 2018, 02:53:38 pm
I would check the other end to see where the water will spray


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What Rob said, it can be putrid too
Title: Re: Dampness in House of Worship
Post by: Erik Jerde on January 19, 2018, 08:13:53 pm
The condensation is coming inside the conduit...which is pretty common. Try closing the end of the conduit off with expanding foam or silicone. Makes it a bit of a pain to pull additional wiring through later, but helps keep the moisture out of the box.

Iíd just grab a block of duct seal and shove some of that in there.  Thatís what itís for and itís not the pain-in-the-ass that foam or silicone would be.  You can get it at Home Depot or your electrical supply shop.
Title: Re: Dampness in House of Worship
Post by: Rob Spence on January 20, 2018, 04:08:53 pm
Iíd just grab a block of duct seal and shove some of that in there.  Thatís what itís for and itís not the pain-in-the-ass that foam or silicone would be.  You can get it at Home Depot or your electrical supply shop.

+1


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Title: Re: Dampness in House of Worship
Post by: Scott Holtzman on January 20, 2018, 04:11:02 pm
+1


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You mean firestop?
Title: Re: Dampness in House of Worship
Post by: Rob Spence on January 20, 2018, 04:21:50 pm
You mean firestop?

No, duct seal. It is like a putty like modeling clay. It never hardens. I still have some from 1974 that is fine. I am blanking on the trade name.



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Title: Re: Dampness in House of Worship
Post by: Hal Bissinger/COMSYSTEC on January 20, 2018, 04:59:04 pm
No, duct seal. It is like a putty like modeling clay. It never hardens. I still have some from 1974 that is fine. I am blanking on the trade name.

DUCT SEAL (https://www.homedepot.com/p/Ideal-1-lb-Block-Duct-Seal-Compound-Standard-Pack-6-Blocks-31-601/300496860?cm_mmc=Shopping%7cTHD%7cG%7c0%7cG-VF-PLA-D27E-Electrical%7c&gclid=EAIaIQobChMImv_MwcTn2AIVAlYNCh3KaAySEAQYASABEgIGEvD_BwE&gclsrc=aw.ds&dclid=CK-4gMjE59gCFYpGNwodaN4EqA)

-Hal
Title: Re: Dampness in House of Worship
Post by: Erik Jerde on January 21, 2018, 02:08:15 am
No, duct seal. It is like a putty like modeling clay. It never hardens. I still have some from 1974 that is fine. I am blanking on the trade name.



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It does get stiffer but Iíve never had it become unusable.  Just this past fall at my in-laws I pulled some out of a hole we were patching up and used it to seal some new conduit.  Worked great, had probably been there for a decade, exposed to the MN weather and all.