Building a concrete home with an architect is a different process from building with a design-build contractor. The architect's role during construction is not supervisory in the sense of managing the contractor — it is design-protective. Every visit, every inspection, every written response to a contractor question is aimed at ensuring that what was designed is what gets built.
For concrete construction specifically, this oversight is not optional. The material cannot be corrected after it cures.
What the Architect Does Before the First Concrete Pour
The construction phase begins before any concrete is poured. Several weeks of preparatory work determine whether the poured concrete will match the design.
Pre-construction meeting: The architect, contractor, structural engineer, and concrete sub-contractor meet to review the concrete specification, formwork plan, pour sequence, and quality control requirements. This meeting establishes shared expectations before any work begins.
Submittal review: The architect reviews shop drawings and product submittals for all concrete-related materials — reinforcing steel layout, formwork system, embedded items (anchor bolts, conduit, sleeves), concrete mix design. Each submittal is either approved, approved with comments, or rejected and resubmitted.
Site preparation verification: Before the foundation pour, the architect verifies that subgrade conditions match the geotechnical recommendations, that formwork dimensions and elevation match the drawings, and that reinforcement placement is correct.
This preparation phase takes 3 to 5 weeks and prevents the most common construction errors.
The Critical Pours and What the Architect Inspects
Not all concrete pours carry equal design risk. The following pours are where architect inspection is most critical:
Foundation: The lowest and most consequential element. Errors in foundation elevation, dimension, or reinforcement create problems that propagate through the entire building. We inspect foundation formwork before every pour in MÉTODO projects — no exception.
Structural walls on the ground floor: These are often the walls that will be visible as interior finish. The formwork quality, tie rod pattern, and pour procedure determine the surface quality. The architect verifies form facing material, tie rod spacing and diameter, and that embedded items (conduit, anchor bolts, window frames) are correctly placed before the pour begins.
Roof slab: The last major structural pour and typically the most complex — embedded drains, penetrations for mechanical equipment, and coordination with the waterproofing system all require pre-pour verification. Post-pour, the slab surface slope toward drains must be confirmed before waterproofing is applied.
Stairs: Concrete stairs that will remain exposed require careful formwork at the nosing and riser faces. Stair geometry is where concrete construction reveals its tolerance for imprecision — a nosing that varies by 10 mm over a flight reads as sloppy construction. We detail stair formwork explicitly and inspect before each pour.
Post-Strip Inspection: The Quality Gate
The most important inspection in concrete construction happens within 24 hours of formwork stripping. At this moment, the surface quality is visible for the first time and — critically — the concrete is still young enough for some repairs to be performed successfully.
A post-strip inspection checklist for architectural concrete surfaces:
- Bug holes: Small surface voids from air trapped during placement. Acceptable threshold depends on location and visibility distance. We specify a maximum size and frequency in construction documents.
- Cold joints: Lines visible in the surface where concrete placement paused. Minimized by pour sequence — structural walls should be poured continuously. If visible, they are documented and evaluated for structural significance.
- Bleed water marks: Horizontal streaks where water rose to the surface during curing. Caused by high water-cement ratio or inadequate consolidation.
- Honeycombing: Coarse, porous aggregate areas where paste did not fill the form. Can be structural or cosmetic depending on depth and location.
- Form mark consistency: The pattern of formwork grain, tie holes, and panel edges should match the design drawings.
Surfaces that fail to meet the specification are documented with photographs, locations noted on a marked-up drawing, and a remedy directive is issued. The contractor is responsible for repairs that meet the specification; the architect approves the repair before covering the surface.
Typical Concrete Home Construction Sequence
For a two-story concrete residence of moderate complexity, the construction sequence typically follows this order:
- Site preparation, excavation, and subgrade compaction — 3-4 weeks
- Foundation formwork, reinforcement, and pour — 2-3 weeks
- Foundation cure and backfill — 2-3 weeks
- Ground-floor structural walls — 6-10 weeks depending on number of pours
- First-floor slab — 3-4 weeks
- Upper-floor structural walls — 6-10 weeks
- Roof slab — 3-4 weeks
- Structural complete, formwork removal, post-strip inspection — 2 weeks
- Waterproofing, roofing, and exterior envelope — 6-8 weeks
- Interior framing, rough MEP, insulation — 8-10 weeks
- Interior finishes (floors, doors, windows, cabinetry) — 10-14 weeks
- Exterior finishes, site work, landscape — 8-10 weeks
- Punch list and corrections — 4-6 weeks
- Occupancy
Total from groundbreaking to occupancy: 18 to 24 months for a 400-600 square meter residence, depending on local labor market, contractor capacity, and design complexity.
Common Construction Problems and How Good Design Avoids Them
Problem: Concrete surface doesn't match the design intent. Cause: formwork quality not specified, or specifications not enforced during contractor selection and pre-pour inspection. Prevention: formwork specification in construction documents and pre-pour inspection requirement.
Problem: Embedded items in wrong location. Cause: shop drawing submitted but not reviewed before fabrication and installation. Prevention: required submittals reviewed and approved before installation begins.
Problem: Concrete cracks at openings. Cause: reinforcement at opening corners inadequate or not placed per drawings. Prevention: drawing detail with reinforcement size and placement at all openings, structural engineer of record sign-off on reinforcement shop drawings.
Problem: Water infiltration at concrete-to-window junction. Cause: sill flashing not installed or incorrectly installed. Prevention: 1:5 detail drawing of sill condition showing flashing membrane, integration with air barrier, and drainage path.
The architectural process before the style means designing these conditions in the documents, not resolving them in the field. Field resolution is more expensive and produces lower quality results.
Próximos pasos
The construction phase of a concrete home is where the design is either realized or compromised. Architect oversight during construction is not a luxury for this material — it is what the design requires.
Conoce el método de MÉTODO — how we structure design and construction oversight for author concrete residences.