You don't always need more A/C. With the roof, shade and moving air, you can get the house close to comfortable without turning on a unit.
Cool the roof (light color or reflective coating, ceiling, radiant barrier), shade sun-facing windows from the outside, and move air with fans and cross-ventilation when there's a breeze. These measures bring the interior closer to 26 °C comfort without continuous power draw See.
The highest-impact-per-dollar measure on a metal roof.
Eaves and awnings stop the sun before it hits the glass.
Fans and cross-ventilation when there's a breeze.
Only in rooms with A/C, so you don't lose the cold air.
What's left is the specifics: which intervention makes sense for your home. Gallardía diagnoses and installs residential thermal solutions in Panama.
Every important claim links to its evidence. Tap to see the source, its context and its limits: Standard Cool roof MiAmbiente. Full bibliography in the evidence library.