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 BUILDING EXTERIOR
F.
General Guidance:
Consider using low maintenance surfaces, such as brick and other permanent
materials. Avoid wood to reduce painting requirements if possible.
Use rustproof fasteners on exposed exterior areas.
Avoid horizontal surfaces on precast concrete, plastic, or metal panels,
where dirt, dust or water will collect.
Provide crack control joints in masonry walls, good pointing and use of
caulking. Avoid deep raked joints.
Avoid external steel stairways if possible, especially in highly corrosive
environments.
Minimize use of signs made of individual letters affixed directly to a wall.
Follow AFP 88-40 and PACAF "MAKE IT BETTER" Sign Guidance.
Avoid irregular building configurations which increase the exterior surfaces
to be maintained.
Use caulking materials that are colored to closely match masonry mortar or
prefinished panels. Avoid oil resin caulking.
Check all specified penetrations through exterior walls for compatibility,
weather proofing and corrosion control. Think of problems of staining
exterior wall and provide for proper drainage of pipe flows. Keep
penetrations to a minimum, and combine into one if possible.
Provide for proper ventilation and moisture barriers.
Select exterior construction that can be maintained and repaired by in-house
forces without requiring specialized training and unavailable equipment.
Exposed steel connections must be carefully detailed to avoid rusting between
components. Weld all around or use quality protective coating around joints.
Ensure that steel channels do not allow water to pond in them.
In maritime areas, consider using galvanized steel members and fasteners that
will be exposed to the environment.
G.
Protective Coatings:
Coating specifications for above and below ground high value metallic
structures must be prepared in accordance with the guide specifications shown
in AFM 85-3, "Paints and Protective Coatings" (revised 1982).
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