Moistureproofing shop - now stage box

[David Love]

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Terry:
 
How air tight is your shop?  And, generally speaking, how air tight does
it need to be for the dehumidifier to be effective?
 
David Love
davidlovepianos@comcast.net 
-----Original Message-----
From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On
Behalf Of Farrell
Sent: Thursday, November 04, 2004 3:37 AM
To: Pianotech
Subject: Re: Moistureproofing shop - now stage box
 
Hi Bob,
 
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.
 
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!).
 
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.
 
Terry Farrell
 
----- Original Message ----- 
From: "Bob Hull" < <mailto:hullfam5@yahoo.com> hullfam5@yahoo.com>
To: "Pianotech" < <mailto:pianotech@ptg.org> pianotech@ptg.org>
Sent: Thursday, November 04, 2004 1:28 AM
Subject: Moistureproofing shop - now stage box
 
> 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.  

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