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Posted to uk.d-i-y
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Keeping damp at bay in an unheated garage
In message , Thomas Prufer
writes
On Wed, 30 Dec 2015 11:19:22 -0000 (UTC), (Andrew
Gabriel) wrote:
There are a few occasions when the absolute humidity (dew point) in
the shed is higher than outside. This tends to be in spring and autumn
around midday, and I have thought about adding a ventilator to kick in
when this happens. But it's not often enough to be worth rushing to do
it, so I haven't done it yet.
However, there are days on end when the RH outside is 100%, and even
periods when it's super-saturated (over 100% and moisture condensing
out on everything, dripping from trees, etc). Ventilation won't help
at all in these cases, and this is what you really need to protect the
shed contents from.
Yes -- much different if there are thick walls, buried. Apparently one
can dry a
cellar well just with ventilation.
And I saw a website with a diy heat exchanger that ventilated and recouped the
heat from the exhaust. The heat exchanger was either very many soft drink
straws, or polycarbonate plates. And the heat exchanger tan into problems with
condensate freezing in sub-zero weather.
I have bag of (I think) zeolith, absorbs moisture and releases it again when
heated in an oven. It keeps the contents of one plastic box dry, if reasonably
well sealed. The bag absorbs about 200 grams of water.
Zeolite, it's what they use in desiccant dehumdifiers
--
Chris French
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