How Miami Humidity Affects Cabinets

Miami sits at 70–90% relative humidity most of the year with brief dips during winter cold fronts. Solid wood expands and contracts across the grain each cycle; MDF absorbs moisture from the air and can swell at the edges near sinks and dishwashers.

The failure modes we see on repair calls are almost always the same: doors that used to close flush now bind, painted panels crack at the joints, and hardware works loose because the substrate around the screws has softened.

Cabinet boxes should be ¾-inch plywood, not particleboard. Plywood's cross-banded veneers resist the seasonal swell that ruins particleboard from the inside out.

Doors and drawer fronts on painted cabinets should use a poplar or maple stile-and-rail construction with a plywood or MDF center panel that's undersized to allow movement. Hardware should be marine-grade stainless or solid brass — zinc-plated hinges corrode within a couple of years within a mile of the ocean.

Cabinets should be scribed to walls and floors, not shimmed with plastic. Toe kicks in laundry rooms and bathrooms belong on adjustable legs so any minor flood can be dried without demolishing the base cabinet.

In waterfront condos we also seal the cut edges of any exposed panels with a moisture-blocking primer before final paint. It adds an hour to the install and eliminates the most common warranty callback.