Jose,
In addition to humidity/water, there is another issue to be addressed.
Cement, as it cures, gives off very fine particulate matter and highly
alkaline molecules.  Some consideration should be given to using better
filters than may be currently in use in the HVAC system, and to changing
them more often for the next couple of years.

Not a perfect solution, but likely to be an achievable one.

Jack C. Thompson
Thompson Conservation Lab
Portland, OR

www.teleport.com/~tcl


On Wed, 6 Nov 1996, Jose A. Ortiz wrote:

> We are in the process of having a cement wash put on the ceiling and
> walls of our library.  (Our esthetics committee ruled against
> painting) This is a very wet and messy process.  Conservation has raised
> concerns of the increased humidity level and the threat of water damage to
> the book collection.  We are considering a book moving service to
> temporarily relocate the books.  Has anyone
> 1.) had experience with any book moving services
> 2.) had this type of wash done to your walls
>
> Thanks
> Jose Ortiz
> The Cloisters/MMA
>