Architects occasionally produce designs where a single conceptual move organizes the entire building. The By The Way House by Robert Konieczny of KWK Promes uses the path of access as its defining motif. A driveway rises from an old orchard, twists around the first floor, and continues as a footbridge down a steep slope toward a river. This ribbon of road creates the ceilings, roofs, and walls of the structure, while the functional rooms sit protected underneath. Lessons from superinsulated home design show how thermal performance can be integrated into unconventional building forms, a consideration that becomes critical when the building envelope follows a non-rectilinear shape like this one.
Circulation as Architectural Form
Most houses treat the driveway and walkway as purely functional elements connecting the road to the front door. The By The Way House inverts this relationship. The path of travel becomes the primary architectural gesture, wrapping around the dwelling and defining its shape. Lessons from planned communities like Reston demonstrate how circulation networks shape entire settlements. At the building scale, this same principle applies: the path does not merely lead to the house, the path is the house.
The Ribbon Concept Explained
The ribbon begins as a driveway through an existing orchard, routing around mature trees to avoid removal. It rises as it approaches the building site, lifting to the first-floor level and twisting to wrap the structure. The ribbon then unrolls on the far side, transforming into a pedestrian footbridge that descends through the trees to the river. This continuous surface performs multiple structural roles. Where it passes over the ground floor, it forms the roof. Where it wraps around the first floor, it becomes walls. Where it extends beyond the building, it is a bridge.
| Ribbon Segment | Function | Structural Role | Material Implication |
|---|---|---|---|
| Approach drive | Vehicle access | At-grade roadway | Reinforced concrete slab |
| Rise and twist | Ramp to first floor | Inclined roof over ground rooms | Load-bearing concrete with waterproofing |
| Wrap around volume | Building enclosure | Vertical wall and roof assembly | Insulated sandwich panel system |
| Footbridge descent | Pedestrian path to river | Cantilevered or supported walkway | Steel or concrete with railings |
Circulation-to-Enclosure Ratio
In conventional residential design, the circulation area (hallways, stairs, corridors) accounts for 10 to 15 percent of the total floor area. The ribbon concept changes this ratio dramatically because the circulation surface itself becomes the building envelope. The total surface area of the ribbon path may equal or exceed the roof area of a comparable conventional house. This surface multiplier affects material quantities, construction cost, and thermal performance calculations.
Site Integration Through Design
The site conditions drove the design solution. An existing orchard with mature trees required a path that wove between trunks rather than cutting them down. The steep slope down to the river meant the building needed to mediate between two different elevation zones. Research from Passive House Canada highlights how building orientation and envelope continuity affect overall energy performance, principles that apply directly to the ribbon form’s complex geometry.
Tree Preservation Strategy
Routing the access path around existing trees required precise site surveying before construction. The driveway follows the natural gaps in the orchard, which dictated its curve and slope. This approach adds cost to the site preparation phase because each tree requires a root-protection zone extending to the drip line. Heavy equipment must work around these zones, and the final driveway alignment may be longer than a straight-line path.
Slope Management Techniques
- Cut-and-fill balancing to minimize exported soil volume and reduce truck traffic
- Retaining walls at key elevation changes to create level building pads
- Drainage swales and French drains to manage surface water on the slope
- Erosion control blankets on exposed soil during the construction phase
- Deep foundation piers where the slope exceeds a 3:12 grade ratio
Building Orientation on Sloped Terrain
Houses on steep slopes require different orientation strategies than homes on flat lots. The By The Way House uses the ribbon form to expand toward the view while the ground-floor rooms nestle into the hillside. This arrangement creates a thermal mass benefit. The earth-contact walls on the uphill side remain at a stable temperature year-round, reducing heating and cooling loads. Industry professionals in the rental sector often evaluate sloped-site homes for their unique construction challenges and the premium their views command in the market.
View Optimization Through Building Form
The ribbon rises toward the view direction, elevating the living spaces above the treeline. This strategy avoids the need for a tall tower or multiple stories. Instead, the gradual ramp lifts the main floor to a level where the river and landscape become visible. Windows on the downhill facade capture the full panorama while the uphill side requires minimal glazing since it faces into the slope.
| Orientation Factor | Flat Site | Sloped Site | Ribbon Design Advantage |
|---|---|---|---|
| View access | Build upward for view | Build outward from slope | Ramp lifts living level naturally |
| Solar gain | Standard orientation rules | Slope angle affects sun angles | Ribbon curves to catch optimal sun |
| Thermal mass | Slab-on-grade only | Earth-contact walls available | Uphill rooms benefit from ground temp |
| Wind exposure | Predictable patterns | Channeling and turbulence | Ribbon form deflects wind upward |
Indoor-Outdoor Transitions on Steep Sites
The footbridge segment of the ribbon extends the living experience beyond the building envelope. Residents walk from the first floor across the bridge, descending through the trees to reach the river level. This design transforms the entire site into occupied space, not just the interior of the house. Cultural building designs that prioritize transparency and porosity share this goal of dissolving the boundary between inside and outside, though at a very different scale.
Bridge Design Considerations for Residential Use
A residential footbridge spanning 50 to 100 feet requires careful structural engineering. The bridge must support live loads of at least 40 pounds per square foot per building code, plus the dead load of its own structure. Railings must be at least 36 inches high with balusters spaced no more than 4 inches apart. The walking surface needs slip resistance, especially in wet conditions, and the entire structure must resist wind uplift forces that can be higher than those on the main building due to the exposed location.
- Engage a structural engineer for bridge design calculations, not a general contractor
- Specify galvanized or stainless steel for all exposed metal components
- Install drainage slots or gaps in the bridge deck to prevent standing water
- Use LED strip lighting integrated into the handrails for nighttime visibility
- Consider a slight crown in the deck surface (1/8 inch per foot) for water runoff
Garden and Landscape Integration
The footbridge meanders between trees on the slope, meaning its alignment follows the natural gaps. Landscape architects can use this path to create garden rooms along the descent. A clearing at one point might hold a seating area with a fire pit. Another spot might open to a prime view of the river. The path itself becomes a curated experience rather than a direct route from point A to point B.
Material and Structural Choices
The ribbon form demands materials that can bend, twist, and span without cracking or failing. Reinforced concrete is the natural choice because it can be formed into curved shapes and provides the structural continuity needed for a surface that functions as roof, wall, and bridge. The concrete must be waterproofed on all exterior surfaces, insulated to meet energy code requirements, and finished appropriately for each zone. Modern barn house concepts from This Old House show how traditional building forms can be reimagined with contemporary materials and methods, similar to how the ribbon concept reimagines the path as a building element.
Concrete Ribbon Construction Methods
Curved concrete surfaces require custom formwork, which is the most expensive element of the construction. A straight flat concrete slab costs $5 to $8 per square foot for materials and labor. A curved concrete shell in a ribbon configuration can cost $15 to $30 per square foot because the formwork must be fabricated on-site by skilled carpenters. The concrete mix must also be adjusted for the application. Self-consolidating concrete with a high slump and superplasticizer additives flows into complex forms without vibration, reducing the risk of voids in tight curved sections.
| Material | Cost per Sq Ft | Formability | Best Use in Ribbon Design |
|---|---|---|---|
| Reinforced cast-in-place concrete | $15 – $30 | Excellent with custom forms | Primary ribbon structure |
| Steel frame with metal cladding | $10 – $20 | Good with curved beams | Bridge and cantilevered sections |
| Glue-laminated timber (glulam) | $12 – $25 | Good with steam bending | Deck and interior roof surfaces |
| Spray-applied foam insulation | $2 – $4 | Excellent on complex shapes | Thermal envelope on non-flat surfaces |
Waterproofing Curved Roof Surfaces
Any roof that also functions as a driveway or walkway must be waterproofed to a higher standard than a conventional roof. Fluid-applied membrane systems conform to curved surfaces without seams, unlike sheet membranes that require careful lapping. Polyurethane or PMMA (polymethyl methacrylate) membranes provide durable waterproofing for vehicular and pedestrian traffic. These systems cost $8 to $15 per square foot installed and require a primer coat, the membrane itself (applied in two coats), and a wear course if the surface will see foot or vehicle traffic.
Design Process and Client Collaboration
The design of the By The Way House emerged from an unusual client conversation. The client initially wanted the architect to replicate the layout of his existing apartment, which he liked, but in a new building on the plot. He also wanted the living room raised to the first floor for a sense of security. Window selection for custom homes is one of many decisions where client preference must be balanced with architectural integrity, a negotiation that happens throughout the design process.
Translating Client Preferences into Architectural Solutions
The architect proposed the ribbon concept as a way to satisfy the client’s desire for an elevated living room while creating something more ambitious than a simple raised box. By wrapping the road around the building, the first-floor living spaces gained views, the ground floor remained sheltered, and the entire composition became a unified design statement rather than a collection of rooms. This approach to client collaboration works when the architect listens to the underlying need (elevated living space, connection to the site) rather than accepting the literal request (recreate my old apartment).
- Ask clients to describe how they want to feel in a space, not just what rooms they want
- Visit the client’s current home to understand their spatial preferences firsthand
- Present multiple design concepts, including at least one that challenges the initial brief
- Use physical models or 3D visualizations to help clients understand non-rectilinear forms
- Budget for design iterations when the project involves unconventional geometry
Budgeting for Custom Architectural Design
A house with the complexity of the By The Way House commands a higher design fee than a standard production home. Architectural fees for a custom home of this complexity typically run 12 to 20 percent of construction cost, compared to 8 to 12 percent for a conventional custom home. The additional cost covers engineering coordination for the non-standard structure, custom detailing for the curved surfaces, and extra design time for the ribbon geometry. Clients should expect the design phase to take 6 to 12 months for a project of this complexity, with construction adding another 12 to 18 months depending on local labor availability.