<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <html xmlns:v="urn:schemas-microsoft-com:vml" = xmlns:o="urn:schemas-microsoft-com:office:office" = xmlns:w="urn:schemas-microsoft-com:office:word" = xmlns:st1="urn:schemas-microsoft-com:office:smarttags" = xmlns="http://www.w3.org/TR/REC-html40"> <head> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; = charset=us-ascii"> <meta name=ProgId content=Word.Document> <meta name=Generator content="Microsoft Word 10"> <meta name=Originator content="Microsoft Word 10"> <link rel=File-List href="cid:filelist.xml@01C4C285.E094BEE0"> <o:SmartTagType = namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="PersonName"/>  <style>  </style>  </head> <body lang=EN-US link=blue vlink=blue style='tab-interval:.5in'> <div class=Section1> Terry:<o:p></o:p> <o:p> </o:p> How air tight is your shop?  And, generally speaking, how = air tight does it need to be for the dehumidifier to be = effective?<o:p></o:p> <o:p> </o:p> <div> David Love <st1:PersonName>davidlovepianos@comcast.net</f= ont></st1:PersonName> = <o:p></o:p> </div> -----Original = Message----- From: = pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On Behalf Of <st1:PersonName>Farrell</st1:= PersonName> Sent: Thursday, November = 04, 2004 3:37 AM To: = <st1:PersonName>Pianotech</st= 1:PersonName> Subject: Re: = Moistureproofing shop - now stage box <o:p> </o:p> <div> Hi = Bob,<o:p></o:p> </div> <div>  <o:p></o:p> </div> <div> It doesn't take a whole lot = to get humidity under control. My shop is a 1,000 square-foot stand-alone = concrete block building with a concrete floor. The only thing I did was to paint = the outside with a paint that is advertised to have moisture-inhibiting = properties (not likely to do much good on your metal walls) and use a Sears-type = basement dehumidifier. My shop easily stays down below 50% RH year = 'round.<o:p></o:p> </div> <div>  <o:p></o:p> </div> <div> What type of insulation did = you use in your walls? If you used a foil-backed fiberglass roll stuff, you = should be just fine - the foil will do a pretty good job of stopping moisture = migration (not to mention your metal walls!).<o:p></o:p> </div> <div>  <o:p></o:p> </div> <div> I would check the function = of your dehumidifier. I had to replace my original one recently because it = started icing over, was running all the time and barely produced water. With the = new one it barely runs and produces a bucket of water every couple days. One = thing I have found is to make sure you get a dehumidifier with an = electronic = humidistat. The dial type seem to wander all over regulating operation of the unit. The electronic ones seem to keep RH pretty darn consistent. The other thing = I do is to keep a small fan running in the area of the dehumidifier - I keep an = air flow over the dehumidifier and pointing out into the shop. That way the humidistat on the unit has exposure to representative shop RH and it = spreads the dried air out into the shop real well when the unit goes = on.<o:p></o:p> </div> <div>  <o:p></o:p> </div> <div> Terry = Farrell<o:p></o:p> </div> <div>  <o:p></o:p> </div> <div> ----- Original Message = ----- <o:p></o:p> <div> From: "Bob Hull" = <<a href="mailto:hullfam5@yahoo.com">hullfam5@yahoo.com</f= ont></a>><o:p></o:p= > </div> <div> To: "Pianotech" = <<a href="mailto:pianotech@ptg.org">pianotech@ptg.org</a>><o:p></o:p= > </div> <div> Sent: Thursday, November = 04, 2004 1:28 AM<o:p></o:p> </div> <div> Subject: Moistureproofing = shop - now stage box<o:p></o:p> </div> </div> <div> <o:p> </o:p> </div> > I appreciate the = reply, Gordon. > > My concrete floor does have a layer of plastic > sheeting under it, if I remember right.  What type- I > don't know.  > > I have seen moisture still come up through some small > cracks and the concrete will look damp around that > crack.   But, overall I don't think I have a big > problem.  I'm still getting the inside walls sheathed > with plywood when time allows.  The building is a > metal building that began as a horse barn.  I added a > ceiling, interior framing and insulation.  I've just > used the localized approach of multiple dehumidifier > bars and blankets draped for drying out soundboards > and this seems to do okay.  > > I think next spring an additional or new dehumidifier > unit will be in order.  > > > I'm outa here for the day. > > Bob H.  <o:p></o:p> </div> </body> </html>