>> Marc LeFevre recently asked....
>>I've seen a couple of posts to this forum regarding the troubles
>>with the high temperatures required for doing layups. Can anyone
>>tell me what those requirements are exactly and how much trouble
>>they are having maintaining them. Also, what percentage of the
>>time building do you need that environment? That is, how often
>>does the work area need to brought up to the temperature and
>>humidity levels required and for how long?
Since my last question on this subject I have invested in a small
domestic (portable) de-humidifier unit (about 140 UK pounds). I am very pleased
with the result.
Previously I have gone for a high temperature (upper 20's centigrade)
in order to drive down the humidity to below 60%. The good book says it must
be below 70% but below 60% is ideal. Also the temp should be above 21 C
(70F).
With the de-humidifier running RH% falls to around 50 or below. This means I can
now work in the much more comfortable temp of low 20's. Also it means
that I don't perspire anywhere near as much, which was also a major source
of the moisture (yuk).
The unit only consumes 200W, and I can maintain the (lower) temp with just a
500W heater. Before I was using at least 1.5KW.
I am not very far into the project, so it is difficult to give an accurate
figure of how often you need to maintain these figures. At the moment I must
spend much more time preparing for lay-ups and trimming afterwards than
actually doing them.
Hope this helps.
Peter Thomas
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