Puerto Morelos Man Turns Sargassum Into Houses, And It's Working

Every summer, tons of brown, smelly sargassum pile up on the beaches of Quintana Roo. For most people, it's a headache. For one man from Puerto Morelos, it became a building material.

Meet Omar Vázquez Sánchez

Omar Vázquez Sánchez founded Blue-Green right here in Puerto Morelos. His idea was simple but bold: take the sargassum choking local beaches and turn it into construction blocks.

The result was Casa Angelita, the first house built with sargassum biomaterial in Mexico. It's been standing for four years now.

The blocks are made from dehydrated and crushed sargassum, which makes up about 40% of the material, mixed with limestone and other organic materials. They don't need to be baked, they dry in about six hours, and are significantly cheaper to produce than regular bricks.

Why This Matters for Puerto Morelos

Anyone who has spent a summer here knows the problem. Between April and August, sargassum arrives in massive waves. It smells, it covers the beaches, and it hurts local tourism and businesses.

In peak years like 2018, massive quantities of sargassum have inundated Quintana Roo beaches, with cleanup crews removing dozens of truckloads daily.

Beyond the smell, decomposing sargassum releases hydrogen sulfide and ammonia, gases that can cause real respiratory and neurological health problems. It also smothers coral reefs and sea grass beds, damaging the very ecosystem that makes this area so special.

The Numbers Behind the Blocks

The sargassum blocks aren't just creative, they're practical. Building with them can significantly reduce costs and resource use compared to traditional methods, including less cement and rebar.

Tests by UNAM confirmed the blocks' resistance to earthquakes and hurricanes. That's a big deal in a region that sees both.

Construction companies in Mexico, Belize, the Dominican Republic, and the French Antilles have all taken notice.

More Than Just Building

Blue-Green has donated 13 homes to low-income families so far. That means this project isn't just solving an environmental problem, it's also helping people who need affordable housing.

Organizations like SECIHTI and BBVA both agree that sargassum growth is tied directly to warming ocean temperatures and nutrient runoff in the Atlantic. The problem isn't going away on its own.

What started as a local nuisance on the shores of Puerto Morelos is now getting international attention. Sometimes the best solutions come from the people who live closest to the problem.