#1374 1998 · CEMEX (Patrimonio Hoy) · Cement / building materials
CEMEX didn't sell cement to the poor — it sold a room, delivered over 70 weekly payments
the problem
Mexico's poor spent up to 10 years building one home, buying cement by the bag and losing ~30% of materials to waste
background
After the mid-1990s peso devaluation crushed Mexican demand, CEMEX — one of the world's largest cement companies — issued what insiders called a Declaration of Ignorance about the poor. Staff lived in low-income neighborhoods for nearly a year, forbidden to advise, only to observe. They found families who had been building the same house for 4.7 years on average, buying tiny cash quantities at small-shop prices, with no plans, no storage and about 30 percent of materials wasted or stolen — a huge market the company had no idea how to serve.
The same fieldwork found tandas everywhere: informal savings clubs in which neighbors pool weekly contributions. But only about 10 percent of tandas ever completed their stated purpose — money diverted to fiestas, illness, routine temptation. Patrimonio Hoy, launched in 1998, productized the tanda: it wrapped the savings club around a fixed-scope construction package with CEMEX's buying power behind it.
what everyone would do
Sell smaller bags through more small shops, or fund a generic microcredit scheme — leaving the actual failure points untouched: no plan, no schedule, no advice, no price protection, and savings that dissolve before they become a room.
what they saw
The poor were not failing to save — the savings vehicle kept diverting the money. Attach the plan, the price lock and scheduled deliveries to the existing savings club, and completion roughly tripled.
the move
Patrimonio Hoy sells the room, not the cement: an architect-drawn plan for a roughly 9-square-meter space, the full materials list priced for 70 weeks at the start (protection against price hikes), deliveries scheduled phase by phase on decorated trucks — every delivery a neighborhood advertisement — with weekly payments of around US$15 collected by the program, free technical advice and inspections, families registering in groups of three for mutual visibility. Dropouts recover their savings in materials, not cash, so walking away buys nothing; and women who finished their own rooms become commissioned promoters selling the program to neighbors — one recruited more than 1,000 families.
why it works
Fixed scope converts an open-ended, frightening project into a 70-week installment with a visible end; the price lock and scheduled bulk deliveries remove the two silent killers, material price spikes and the roughly 30 percent pilferage and waste; refunds in materials make abandoning pointless by design; the free architect consultation is the draw that gets families in the door; the three-family registration adds social monitoring to financial obligation; and promoters who finished their own rooms carry a trust no advertising can buy — decorated delivery trucks then turn each fulfillment into street theatre that recruits the next street.
the payoff
Completion rose from ~10% under informal savings clubs to ~50%; costs fell 15-35% and construction time 60-70% (program figures)
where it breaks
It depends on stable input prices and dense delivery logistics — dispersed rural housing breaks the route economics. Fixed weekly payments still strain households with irregular income; the program mitigates with pauses and banking materials, and completion around 50 percent still means half drop. Where trust in the company is low or violence disrupts neighborhoods, promoters cannot sell. And a company running consumption finance for the poor can drift into selling debt people cannot carry — the model monetizes discipline, it does not create it.
what came after
Patrimonio Hoy expanded across Mexico and to Colombia, Nicaragua, Costa Rica and the Dominican Republic, reporting hundreds of thousands of participating families; it became the canonical bottom-of-the-pyramid business case in development literature, and Banco Azteca's founders studied it when designing banking for the same population.
references
- [1]Improved Housing and Its Impact on Children: An Exploration of CEMEX's Patrimonio HoyWilliam Davidson Institute, University of Michigan, 2013wdi.umich.edu
- [2]Block by Block (SSIR)Stanford Social Innovation Review, 2005ssir.org
Widely retold, only partly documented. Filed as hearsay.