Factory-engineered precision · European manufacturing · US & EU code compliant · Full architectural and engineering drawings on every project
A structurally complete, factory-built frame — walls, floors, and roof cassettes with all membranes. Ready for the envelope and interior to be completed by your contractor.
Shell + full exterior envelope + insulation, MEP rough-in, internal linings or finishes as designed, wet-area waterproofing, and floor substrate. Only finishing trades and utility connections remain.
Fully finished home delivered from the factory. Foundation, site assembly, and utility connections are all that remain.
How our tiers are structured: The Shell delivers a precision-engineered structural frame with all membranes factory-applied. The Semi-Finished tier completes the full exterior — triple-glazed windows, doors, facade cladding, standing-seam metal roof, and all flashings factory-installed — plus insulation, MEP rough-in, internal linings or finishes as designed, and wet-area waterproofing. The Turn-Key / Move-in Ready tier finishes the interior to a fully liveable standard. Every tier includes full architectural and structural engineering drawings stamped by a licensed engineer.
| Item | Shell | Semi-Finished | Turn-Key / Move-in Ready |
|---|---|---|---|
| Structure & membranes — Shell and above | |||
| Structural frame — wall panels, floor & roof cassettes | Included | Included | Included |
| Structural sheathing — 18mm / ¾" OSB/3 all faces | Included | Included | Included |
| Vapour control layer (VCL) — airtight, factory-taped | Included | Included | Included |
| Water-resistive breather membrane — all exterior faces | Included | Included | Included |
| Architectural + structural + MEP engineering drawings (stamped) | Every project | Every project | Every project |
| Full exterior envelope — Semi-Finished and above | |||
| Windows & exterior doors — triple-glazed, factory-installed & sealed | Not included | Included | Included |
| Exterior facade cladding & ventilated substructure | Not included | Included | Included |
| Roof covering — standing-seam metal (standard) | Not included | Included | Included |
| Ridge, eave, verge & valley flashings | Not included | Included | Included |
| Insulation, linings, MEP rough-in & waterproofing — Semi-Finished and above | |||
| Wall insulation — R-23 / RSI-4.0 full-fill mineral wool, 140mm / 5½" | Not included | Included | Included |
| Floor insulation — R-30+ / RSI-5.3+ mineral wool, 200mm / 8" | Not included | Included | Included |
| Roof insulation — R-49+ / RSI-8.6+ mineral wool + PIR board | Not included | Included | Included |
| Internal gypsum lining or other finishes as per design — walls & ceilings | Not included | Included | Included |
| Wet-area waterproofing — bathrooms, shower, sauna (DIN 18534 / ANSI A118.10) | Not included | Included | Included |
| Electrical conduit, wiring rough-in & back-boxes | Not included | Included | Included |
| Plumbing pipe rough-in — PE-X supply & HDPE waste | Not included | Included | Included |
| Ventilation duct rough-in (in-panel) | Not included | Included | Included |
| Floor screed / substrate — ready for finish floor | Not included | Included | Included |
| Interior doors, frames & hardware | Not included | Optional upgrade | Included |
| MVHR / heat-recovery ventilation unit | Not included | Optional upgrade | Included |
| Underfloor heating system | Not included | Optional upgrade | Optional upgrade |
| Sauna fit-out (where in project scope) | Not included | Optional upgrade | Optional upgrade |
| Interior finishes — Turn-Key / Move-in Ready only | |||
| Flooring — engineered hardwood / parquet / porcelain | Not included | Not included | Included |
| Tile — bathrooms and wet areas | Not included | Not included | Included |
| Kitchen — cabinets, worktops, sink | Not included | Not included | Included |
| Bathroom fit-out — fixtures, fittings, accessories | Not included | Not included | Included |
| Skirting, architrave & trim | Not included | Not included | Included |
| Paint — factory spray finish | Not included | Not included | Included |
| Final electrical fixtures & consumer unit | Not included | Not included | Included |
| Final plumbing fixtures & sanitary ware | Not included | Not included | Included |
| Always buyer's responsibility — all tiers | |||
| Foundation / slab / helical piles | Buyer arranges | Buyer arranges | Buyer arranges |
| Site assembly & crane | Buyer arranges | Buyer arranges | Buyer arranges |
| Transport, customs & delivery (EXW) | Buyer’s cost | Buyer’s cost | Buyer’s cost |
| Utility connections to mains (electric, water, sewer) | Buyer arranges | Buyer arranges | Buyer arranges |
| Layer (inside → out) | Code minimum | Industry standard | Verdella — built to a higher standard |
|---|---|---|---|
| Interior lining or finish as per design | ½" / 12.5mm gypsum | ½" gypsum, site-applied | ½" / 12.5mm moisture-resistant gypsum as standard · alternative finishes (decorative plywood, timber panel, acoustic board) specified per design · factory-applied under controlled conditions · 5/8" / 15mm Type X fire-rated where required |
| Service cavity | Not required by code | Rarely included | 1½"–2" / 38–50mm dedicated void behind VCL — all electrical and plumbing runs behind the airtight layer so the membrane is never punctured |
| Vapour control layer | Required Zones 5–8 (US) · mandatory warm-side (EU) | 6-mil / 0.15mm polyethylene, stapled | Pro Clima Intello Plus intelligent adaptive VCL · all joints, laps, and penetrations factory-taped · target n50 < 1.0 ACH |
| Structural framing | 2"×4" / 38×89mm @ 16" / 400mm o.c. (US min) · 140mm @ 600mm (EU min) | 2"×4" / 38×89mm common in US · 140mm common in EU | 2"×6" / 38×140mm KVH C24 kiln-dried studs @ 16" / 400mm o.c. throughout all exterior walls · engineered LVL headers over all openings · 58% deeper cavity than code minimum |
| Cavity insulation | R-13 / RSI-2.3 (US min) · ~R-20 / RSI-3.5 (EU equiv.) | R-21 / RSI-3.7 fibreglass batts — common standard | R-23 / RSI-4.0 — 140mm / 5½" full-fill mineral wool · non-combustible Euroclass A1 · acoustic benefit over fibreglass · zero thermal bridging |
| Structural sheathing | 7/16" / 11mm OSB (US) · 12mm OSB/3 (EU) | 7/16" / 11mm — code minimum | 18mm / ¾" OSB/3 — 63% thicker than US code minimum · all edges blocked · joints taped for WRB redundancy |
| Water-resistive barrier | No.15 felt / IRC R703.2 (US) · vapour-open membrane (EU) | Housewrap at varying quality levels | Pro Clima Solitex Mento or DuPont Tyvek CommercialWrap D · Sd < 0.02m vapour-open · UV-stable 6 months · all laps taped · integrated flashing tape at every opening |
| Continuous exterior insulation | R-5 to R-10ci / RSI-0.9–1.8 required Zones 4–8 (US) | Frequently omitted at base pricing | 1½"–2" / 40–50mm rigid mineral wool or PIR board — standard upgrade · reduces thermal bridging at studs by ~30% |
| Ventilated rainscreen | 3/16" / 5mm drainage space (US marine) · 20–30mm required (EU) | 25mm / 1" — code minimum | 40×50mm / 1½"×2" vertical counter-battens — 40mm fully drained and ventilated cavity |
| Overall assembly | U ≈ 0.28–0.35 W/m²K (US Z4–8) · U ≤ 0.20 W/m²K (EU NZEB) | U ≈ 0.22–0.27 W/m²K — market common | U ≤ 0.17 W/m²K / whole-wall R-33+ — 15% better than EU NZEB |
Building codes set a minimum. Most builders meet it. We publish what we ship instead — a baseline that clears code, beats the common spec, and stays the same on every project. See it across twelve categories below.
Triple-glazed windows, doors, cladding, standing-seam roof and all flashings factory-installed before delivery.
2"×6" / 38×140mm KVH C24 throughout · R-23 / RSI-4.0 mineral wool · U ≤ 0.17 W/m²K — 15% better than EU NZEB.
R-49+ / RSI-8.6+ mineral wool + PIR · U ≤ 0.13 W/m²K — 13% better than EU NZEB, 38% better than US code.
Target n50 < 1.0 ACH — intelligent adaptive VCL factory-taped at every joint, lap and penetration.
Triple-glazed standard · Uw ≤ 0.80 W/m²K · thermally broken frame · factory-installed and pressure-tested before shipping.
Standing-seam metal standard · 50+ year service life · zero maintenance · factory-fitted on cassettes and watertight before shipping.
Thermowood® · Accoya® · fibre cement · mineral stucco · 25–50 yr service life · factory-installed and weathertight before delivery.
Gypsum as standard, or decorative plywood, timber panelling, acoustic board per design — all factory-applied under controlled conditions.
Schlüter KERDI / Mapelastic factory-applied · 28-day cure before delivery · hydraulically tested · drain bodies set at exact level in factory.
18mm / ¾" OSB/3 across walls, floors and roof cassettes — 63% thicker than US code minimum.
Architectural + structural + MEP drawings on every project · stamped by a licensed engineer · US and EU code compliant.
Panel-by-panel structural review · MEP pressure test · waterproofing hydraulic test · airtightness tape inspection · signed photographic punch list before any panel ships.
Specifications represent our baseline standard — adjusted and confirmed per project location, climate zone and design. Code minimums sourced from 2021/2024 IECC, IRC, EN 1995-1-1, EPBD 2024 and GEG 2023.
Verdella Homes is a housing technology company designing and manufacturing off-site construction systems for residential and multifamily projects worldwide.
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