Typical metal-frame construction
- − Metal exposed to outdoor conditionsMoisture and damaged protective coatings can leave metal framing vulnerable to corrosion.
- − Cement board moves with heat and moistureCement board attached to metal framing responds to temperature and moisture changes. The cement board, metal frame and finish layers respond differently to changing conditions.
- − Movement stresses connectionsRepeated expansion and contraction puts stress on fasteners, seams, joints, adhesives and finishes.
- − Finishes can be affectedMoisture entering gaps and repeated movement can contribute to moisture intrusion, popped tiles, cracked stucco and other finish damage.
- − Things can get out of alignmentMovement can throw openings out of alignment, making doors and drawers harder to open or close.


