Do solid wood doors warp or swell in humid tropical climates?

Any timber absorbs moisture, so a door can cup, swell or bind when indoor relative humidity swings. The risk is controlled three ways: kiln-drying to 8–12% moisture content, balanced construction (equal veneer or laminate on both faces, engineered core), and complete six-sided sealing. For coastal and tropical projects we recommend engineered or WPC cores, or solid wood with full edge sealing and a stable 40–60% indoor RH.