Moistureproofing shop - now stage box

[Farrell]

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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 -----=20
From: "Bob Hull" <hullfam5@yahoo.com>
To: "Pianotech" <pianotech@ptg.org>
Sent: Thursday, November 04, 2004 1:28 AM
Subject: Moistureproofing shop - now stage box


> I appreciate the reply, Gordon.
>=20
> My concrete floor does have a layer of plastic
> sheeting under it, if I remember right.  What type- I
> don't know. =20
>=20
> 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. =20
>=20
> I think next spring an additional or new dehumidifier
> unit will be in order. =20
>=20
>=20
> I'm outa here for the day.=20
>=20
> Bob H. =20

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