material has a minimum paint coil coating of 0.7 mil thickness. Where
aluminum is in contact with concrete or masonry, coat the aluminum contact
surface with bituminous paint or, where appearance is a requirement, a paint
system consisting of a chromate primer and two-coat enamel finish.
All nails, screws, bolts and fasteners are stainless steel or
aluminum; except where galvanized steel is used (in concealed areas),
galvanized screws and bolts may be used in lieu of stainless steel. Do not
use aluminum for securing suspended ceiling systems onto concrete or masonry
Special Panels. In high-humidity areas, select acoustical lay-in
panels in food service and bath areas and in un-air conditioned areas based on
mineral-fiber/cement panels, and aluminum pans. If regular cellulose
composition panels are used, use them only in 2-foot by 2-foot grid systems.
Maintenance Considerations. Ensure that ceiling systems, including
acoustical tile and concealed suspension systems employed in air conditioned
facilities, are under a continual maintenance program.
Flooring Material. Do not use coral aggregate, dolemites, or
limestone as a setting bed for tile or terrazzo. Wood flooring requires
termite treated wood. Carpeting is secondary-backed type installed with a
Paints and Stains. Because of the severity of many tropical
environments (high solar radiation, high temperatures, high rainfall and salt
spray), paints frequently will not perform well at tropical locations. Mildew
defacement and deterioration of paints may occur rapidly if preventive
measures are not taken. Procurement delays, inadequate storage facilities,
application equipment failures and general remoteness from more populated
locations with available technical help may add further problems to the
Material Selection. The selection of paint materials and systems
is frequently determined by the list of substrates and materials listed in
NAVFAC NFGS 09900, Painting. The materials or systems listed for a given
substrate perform suitably in the tropics if the substrate is properly
prepared and the paint material is properly stored, handled, and applied.
Where the guide specification gives one or more options, it is recommended
that the superior option (i.e.; an alkyd over a latex or an epoxy over an
alkyd, for example) be selected.
Special Considerations. In cavity or double wall construction,
apply a low permeable coating to exterior walls to help minimize the amount of
moisture transfer through the wall. Apply a high permeable coating to
interior wall surfaces to ensure that any water vapor that passes through the