Caribbean Roofs: Build for Heat, Rain and Hurricanes
The roof has three jobs that matter unusually strongly in the Caribbean: stay attached in extreme wind, keep tropical rain outside and stop solar heat from turning the ceiling into a radiator. A roof that solves only one of those jobs is incomplete.
The continuous load path
Think of hurricane uplift as a chain: roof sheet → purlin/batten → rafter/truss → wall plate/ring beam → wall → foundation. The chain is only as strong as its weakest connection. “We used hurricane straps” is not enough if they are the wrong product, poorly fixed or connected to a weak member.
Roof-area estimator for budgeting
This estimates surface area for paint/coating, insulation planning or rough material budgeting. It is not a structural design tool.
Spend attention at the edges
Wind pressure is not uniform over a roof. Eaves, ridges, corners and gable-end zones can be more demanding than interior areas. That is why prescriptive codes do not simply say “one screw every x inches everywhere.” Ask the contractor to show which approved roof detail is being followed and photograph the completed fixings before ceilings hide the connections below.
Heat: stop it at the top
Reflective exterior
A light or tested reflective roof reduces absorbed solar energy before it enters the assembly.
Radiant control
A correctly installed radiant barrier can reduce radiant heat transfer in suitable hot-roof/attic assemblies, but it is not a substitute for bulk insulation.
Insulated ceiling/roof
Bulk insulation slows heat transfer into occupied rooms and reduces the load on air conditioning.
Corrosion can quietly remove hurricane strength
A connector can look adequate on installation day and lose section over years of salt exposure. FEMA's coastal guidance documents corrosion of ties, fasteners, anchors and connectors as a recurring problem in coastal storm damage. Specify corrosion protection for the exposure, use compatible metals and inspect roof fixings periodically rather than waiting for a hurricane warning.
Roof checklist before paying for completion
- Approved roof framing and connection details followed.
- Roof-to-wall connectors visible/photographed before concealment.
- Correct cladding thickness/specification and fixings.
- Flashings complete at ridges, valleys, penetrations and wall junctions.
- Gutters/downpipes have a safe stormwater destination.
- No untreated cut edges or obvious incompatible metal combinations.
- Attic/roof ventilation paths, if part of the design, remain open.
- Ceiling insulation/radiant layers do not block drainage or trap known roof leaks.