Factory-informed. Site-built where it matters.
The Cardwell3 is engineered as a repeatable product — a SIP-panel building system designed for speed, energy performance, comfort, and consistent quality.
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- Independent units per lot
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- Defined build phases
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- Repeatable system design
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- Bedrooms · 6 bathrooms
A defined path from lot to handover
- Phase 1
Planning, Permits & Foundation
What happensSite evaluation, design fit to the lot, permitting, utilities, and the foundation system are completed up front.
Why it's fasterFront-loading design and approvals on a repeatable plan is intended to shorten the slowest part of most projects.
Less labor, waste & complexityA standardized footprint reduces redesign, rework, and one-off engineering on every build.
What the owner seesApproved drawings, a permitted project, and a finished foundation ready for vertical construction.
- Phase 2
Dry-In Shell
What happensFraming, sheathing, roof, windows, and exterior doors go in to make the building weather-tight.
Why it's fasterReaching dry-in quickly protects the interior and lets trades work in parallel, sheltered from weather delays.
Less labor, waste & complexityRepeatable framing packages and pre-planned openings cut measuring, cutting, and material waste.
What the owner seesA recognizable building — walls up, roof on, openings sealed — a clear, photogenic milestone.
- Phase 3
Interior Rough-Ins
What happensElectrical, plumbing, HVAC, low-voltage, insulation, and air sealing are roughed in and inspected.
Why it's fasterCoordinating mechanical systems against one known plan reduces conflicts and on-site problem-solving.
Less labor, waste & complexityPre-coordinated routing means fewer specialized trades reworking each other's paths.
What the owner seesPassed rough-in inspections and a building ready to receive finishes.
- Phase 4
Interior Finishes
What happensDrywall, flooring, cabinetry, fixtures, tile, paint, and trim complete the living spaces.
Why it's fasterStandard finish schedules let the same crews repeat a known sequence with predictable quality.
Less labor, waste & complexityRepeatable specifications reduce decision fatigue, ordering errors, and finish-stage waste.
What the owner seesThree move-in-ready units with a consistent, premium interior.
- Phase 5
Furnishing, Commissioning & Handover
What happensSystems are commissioned and tested; the optional furnishing package is installed; the owner is walked through and handed the keys.
Why it's fasterA defined commissioning step is intended to confirm comfort, safety, and performance before handover.
Less labor, waste & complexityA productized furnishing package turns a custom scramble into a repeatable install.
What the owner seesA documented walkthrough, commissioned systems, and — if selected — a fully furnished, rent-ready building.
One repeatable stack
One repeatable stack, layer by layer
Drag to rotate. The Cardwell3 is engineered as a stack of repeatable assemblies — foundation, structure, envelope, and roof — so the same system can be built again and again with consistent quality.
- Roof & solar-ready shell (SIP)
- Upper level — bedrooms & bath
- Main level — living, kitchen, garage
- Foundation — slab & capillary break
Engineered for productivity, performance, and quality
Construction productivity
A known plan and repeatable assemblies let crews repeat a proven sequence instead of solving a new building every time.
Material efficiency
SIP panels arrive as engineered components, designed to reduce on-site cutting, measuring, and waste.
Energy efficiency
A continuous, well-sealed SIP envelope with mini-split heat pumps is designed to lower conditioning loads.
Factory + on-site balance
Factory-built panels for the envelope, paired with skilled on-site assembly where craft matters most.
Fewer specialized trades
Pre-coordinated mechanical routing is intended to reduce conflicts and rework between trades.
Build repeatability
Designed as a product, so the system can improve and standardize build over build.
Quality control
A defined commissioning step is intended to verify comfort, safety, and performance before handover.
Security
Secure entries and a garage-integrated ADU, planned for modern locks, cameras, and smart-home readiness.
Soundproofing
Assemblies detailed to reduce sound transfer and support privacy across a multi-door building.
HVAC comfort
Wall-mounted mini-split heat pumps plus fresh-air ventilation, designed for quiet, even comfort.
Solar readiness
Roof and electrical planning intended to accommodate photovoltaics where site conditions allow.
Explore the assemblies
Government-lab-backed airtightness
Independent testing referenced by Oak Ridge National Laboratory found SIP construction dramatically more airtight than conventional framing — the foundation of a comfortable, low-energy home.
SIP vs. conventional framing, identical-structure test (ORNL)
vs. a comparable framed structure (Whole Building Design Guide, citing ORNL)
expected for the Cardwell3 (SIP + HRV/ERV); current U.S. energy code is ~3–5
Airtightness figures reference research performed or referenced by the U.S. Department of Energy's Oak Ridge National Laboratory (ORNL), DOE Building America, the Whole Building Design Guide (WBDG), and the Structural Insulated Panel Association (SIPA). Final airtightness is verified by blower-door testing on the completed building.
Built to score low — and cost less to run
SIP homes routinely earn strong HERS Index scores. Here's where the Cardwell3 is designed to land, the DOE envelope finding, and real measured SIP projects for reference.
vs. ~100 for a code-built home — and 0–30 with solar. Lower is better; an estimate pending a certified RESNET rating.
DOE Building America finding for SIP shells — before solar or heat pumps.
Comparable SIP + heat-pump + HRV homes vs. code-built, depending on rates and occupancy.
Measured SIP projects (third-party rated)
Real homes built with SIPs, with verified HERS scores — evidence that the envelope delivers.
HERS figures for the Cardwell3 are estimates based on comparable SIP projects and DOE/RESNET performance data — not a certified rating. A certified RESNET rater (using REM/Rate or Ekotrope) produces the official HERS Index; final energy and cost savings depend on finishes, windows, HVAC, occupancy, and utility rates.
Luxury feel without luxury waste
Less energy use
A continuous SIP envelope — designed for roughly 30–50% better real-world wall performance than 2×4 framing — is intended to lower conditioning loads.
Less waste
Repeatable specifications and standard cut packages are intended to reduce material waste.
Less material complexity
One refined parts list replaces dozens of one-off decisions.
Fewer specialized trades
Pre-coordinated routing reduces rework between trades on site.
Faster construction cycles
A known sequence lets crews repeat what they already know how to build.
Factory + on-site balance
Factory-built SIP panels for the envelope, paired with on-site assembly where it matters most.
Repeatable production
Designed as a product, so quality and pace can improve build over build.