If you're planning to put your artwork in a very high
moisture environment such as a bath or powder room, be
sure to tell your framer ahead of time. There are measures
they can take to minimize the problems you will have. For
pieces framed under glass make sure your framer has the
back of the painting sealed in a relatively airtight manner. A
tight seal on the back will help ensure the humidity from
showers and such has minimal effects on your artwork. If
you notice moisture on the interior of the frame
between the glass and the painting take it to a
framer and have the problem corrected immediately!
When your image has warped have a professional art
restorer do the restoration, don't do it yourself by
putting it under books, this will leave impressions of
different shapes and sizes all over the artwork. Cracking on
your oil canvas maybe possible to have restored by a
professional restorer; but when your Giclée, your serigraph
or lithograph on canvas cracks they are 99% done for.
You should have a pro check them out, but don't be too
hopeful.
If you're looking for a qualified professional restorer,
calling your insurance company is a good place to start.
Almost every large city has art restorers habitually used by
the insurance companies. The Yellow Pages is also a good
guide, but be sure to check the references from a
company you pick out of the yellow pages.
A newspaper curious to learn which painting in the
Louvre people would be most willing to protect ran a contest
asking, "If a fire broke out in the Louvre and you could save
only one painting, which would it be?" The winner of the
contest was Tristan Bernard, his answer... "The one nearest
the exit!"