An architect who designs from climate rather than from style begins with a different first question. Not "what should this house look like?" but "what does this site's climate demand?" The answer to the second question shapes the building more fundamentally than any aesthetic preference.
The Climate Analysis Comes Before the Plan
In MÉTODO, the first drawing produced for any residential project is not a floor plan. It is the asoleamiento diagram: a study of solar angles at winter and summer solstice, at morning and afternoon, mapped onto the site orientation.
This diagram answers several questions at once:
- Which building face receives the most solar gain in summer? That face needs protection — deep eaves, horizontal louvers, or a solid wall with strategic openings.
- Which direction should the main living spaces face to receive low winter sun? In Mexico City, true south captures the most solar energy in winter while allowing deep roof overhangs to block summer sun.
- Where does shade fall in the afternoon in July? That is where the outdoor sitting area belongs.
The asoleamiento analysis is not a style decision. It is a thermal performance decision that generates spatial consequences.
How Climate Shapes the Section
The sección como relato — the section as the story of the house — is most directly shaped by climate. A cross-section reveals decisions that a plan cannot show:
- How heat rises through the building and where it exits
- Where thermal mass is placed to absorb daytime heat and release it at night
- How roof geometry manages rain, insulation, and solar gain simultaneously
- Where light enters and at what angle
In Mexico City's temperate highland climate, the key climatic challenges are: cool mornings, warm afternoons, intense midday sun in the dry season, and afternoon rain in the wet season. A climate-responsive house in CDMX addresses all four within its section.
A house in a coastal tropical climate has a completely different section: elevated floor to capture breezes, deep overhangs on all sides for shade and rain protection, open lattice or louver walls for maximum ventilation, minimal thermal mass because the goal is to avoid storing heat.
The climate produces the section. The section produces the experience.
Passive Systems Before Mechanical Systems
Respuesta climática — climate response — begins with passive strategies: design decisions that manage thermal comfort without energy input. Mechanical systems — air conditioning, heating, ventilation — are supplements to what passive design cannot resolve, not the primary strategy.
The order matters economically. A house that relies on air conditioning to be comfortable in summer has ongoing operating costs built into its design. A house that is passively comfortable in spring and fall and requires mechanical assistance only at the extremes costs less to inhabit over decades.
Passive strategies in order of impact:
- Orientation and plan organization: Place spaces where the climate works for them.
- Thermal mass: Dense materials — stone, concrete, adobe — absorb heat during the day and release it at night.
- Shading: Overhangs, fins, and trees sized to block summer sun while admitting winter sun.
- Cross-ventilation: Windows placed to create pressure differential that drives air movement.
- Insulation: Resistance to heat transfer in roofs and walls.
Only after these are maximized does mechanical supplementation make sense.
Materialidad Honesta as a Climatic Strategy
Materials chosen for materialidad honesta — expressing what they actually are — tend to perform well climatically. Stone has high thermal mass. Wood provides insulation in walls and warmth underfoot. Concrete, exposed and thermally massive, absorbs and moderates temperature swings.
These materials also age with dignity, which means the climate-responsive house does not need to be renovated to stay current — it deepens with time.
Synthetic materials chosen to imitate natural ones typically have neither the thermal performance nor the longevity. They perform less well climatically and require replacement to stay presentable.
Próximos pasos
If you are beginning a residential project, share the site's address and orientation before the first design conversation. That information, combined with climate data, produces the asoleamiento analysis that anchors every subsequent decision.
Conoce el método de MÉTODO to understand how climate analysis drives our design process from the first session.