I would suggest a layer of 1/2" cdx plywood under the drywall. This will form a minimal moisture barrier, but it sure is nice to be able to screw into something more substantial than drywall when hanging works of art. It beats using a stud finder, or fussing with hollow wall anchors too. On Thu, 7 Sep 1995, Michael Knies wrote: > We are in the process of renovating an old department store to serve > as a new museum. It is an 80,000 sq. ft. building and it will be multi-tenant . > We will occupy about 15,000 sq. ft. on the third and fourth floors. There will > be about 11,500 on the thid floor and 3,500 on the fourth floor (to be > developed in the future). There will be a 30'x16' cut-out between the floors > to be sealed until fourth floor development. There will be a rubber roof. > The exterior walls are brick (three courses thick I think). The > architects plan to attach metal studs to the brick walls, place rigid foam > insulation between the studs and screw drywall onto the studs. > We would like to place a vapor barrier behind the drywall to help > retain winter humidification in our space. I'm looking for suggestions > concerning options for vapor barriers, keeping in mind that the barrier will b e > punctured by screws and that we are on a very tight budget. > Thanks. Post to me directly unless you think the list will be amused > by talk about neoprene, etc. > > Michael Knies > Collections Manager/Archivist > Canal Museum, Easton PA > [log in to unmask] >