In Mexican residential and cultural architecture, the water basin is one of the oldest patio elements and also one of the most frequently mishandled. At MÉTODO, a designed water basin is not a fountain catalog selection — it is a custom element with specific proportions, material logic, and drainage coordination that makes it site-specific.
The Patio as Organizer — and Water's Role In It
The colonial Mexican patio is organized around a center. That center has historically been water: a well, a fountain, a basin. The geometry of the patio radiates from this point. Circulation wraps it. Rooms open toward it. The water is not decorative; it is the spatial anchor.
We work from this logic in contemporary residential projects. A water basin in an interior patio gives the plan a datum — a fixed point that the rest of the space can orient around. Without it, interior patios often feel unresolved: nice light, pleasant air, but lacking a reason to stop.
The patio como organizador — the courtyard as spatial organizer — is one of the foundational ideas in our work. Water is the most precise way to mark that organizational center.
Material: Cantera, Concrete, and the Aging Question
The material decision for a water basin is inseparable from the aging question. Stone and concrete behave differently over time in contact with water in Mexico City's conditions.
Cantera (volcanic stone): natural porosity means the stone is alive to the water. Mineral deposits from CDMX's hard tap water create a white calcium crust on cantera surfaces over time. Many clients find this patina appropriate; it reads as honest material aging. We typically leave it. If the client prefers a clean surface, we specify a calcium-resistant penetrating sealer applied every three years.
Polished concrete: denser surface, cleaner aging, sharper shadow lines at the edge. We use exposed-aggregate concrete or broom-finish concrete for a more textural surface — plain troweled concrete can feel too commercial in a residential patio context.
Basalt: the darkest and hardest of the volcanic stone options. It ages extremely well near water, developing a subtle sheen as minerals deposit into the stone's fine texture. Higher cost than cantera but lower maintenance.
In all cases, the basin base is reinforced concrete with a waterproof membrane — the stone or concrete finish is applied over a structural substrate, not as a self-supporting basin. The membrane detail at the perimeter and drainage penetration is the technical core of the work.
Proportions and Depth
Basin depth is one of the most misunderstood parameters. Deep water reads dark, still, and formal — appropriate for a cultural or institutional patio. Shallow water reads bright, reflective, and residential. A depth of 15 to 20 centimeters is our standard residential range: enough volume for a recirculating pump, enough surface area for sky reflection, shallow enough that the base material is visible and the water reads as thin.
Proportions in plan should relate to the patio geometry. In a 6-by-8-meter patio, a 1.5-by-2-meter basin is appropriately scaled — present but not dominating. In a 10-by-10-meter patio, a 3-by-3-meter basin can anchor the space without crowding it.
The edge condition is the detail that communicates quality. Flush-to-grade with a recessed drain slot: formal, precise. Raised 15 to 20 centimeters with a wide coping that functions as seating: informal, social. We present both options to clients through a matrix de opciones — comparing scaled section drawings of each edge condition in context before committing to one.
Water System: Recirculating, Overflow, and Maintenance
A residential patio basin should always be recirculating rather than static. Static water grows algae rapidly, requires frequent draining and cleaning, and loses its acoustic quality within days.
A recirculating system requires:
- Submersible pump rated for the basin volume (typically 2 to 4 times the basin volume per hour)
- Pre-filter housing to protect pump from debris
- Overflow drain at basin rim connected to patio drainage system
- Clean-out drain at basin bottom for full drain-and-clean cycles (twice per year minimum)
- GFCI-protected electrical connection weatherproof conduit, coordinated with electrical from schematic design
The pump housing and electrical conduit routes are construction documents items. They must be coordinated with civil drainage and electrical before paving is installed — not resolved as field decisions.
Próximos pasos
A water basin designed and built with this level of coordination will look and perform the same in year ten as it does at project completion. One resolved without this coordination becomes an expensive maintenance problem by year three.
Conoce el método de MÉTODO and how we develop patio and water feature design from brief through construction.