Technical specifications

Three variants:

• CLT (Cross-Laminated Timber): solid cross-glued timber, 3–8 layers, 60–300 mm thick, max panel 13,800 × 3,150 × 400 mm. Up to 8 storeys.
• Timber frame (HSB): insulated panel construction, max approx. 12 × 3.5 m. Up to 5 storeys.
• Hybrid: CLT in critical places (visible wood, spans), timber frame for the envelope. A more favourable cost profile than all-CLT, project-dependent.

Shell Comfort, Premium and Lux:

• Comfort: indicative U = 0.18 W/m²K, Rc approx. 4.5 — meets the Dutch BENG requirement
• Premium: U = 0.136 W/m²K, Rc > 4.7 — comfortably exceeds BENG
• Lux: U = 0.100 W/m²K with STEICOtherm + Fermacell
• Range: U = 0.10 to 0.20 depending on package
• Best measured airtightness: n50 = 0.24 (passive-house level)

Wood fibre (STEICOflex, STEICOtherm), cellulose (Isofloc), mineral wool or combinations. The choice depends on budget, the Dutch MPG target and acoustic/fire requirements.

CNC production on a Hundegger Speed-Cut SC3, tolerance ±1 mm. Engineering in SEMA. Production administration in accordance with ISO 9001:2015 (certificate on request). Every panel undergoes a visual and dimensional final check; photo reporting per project available.

Factory-fitted windows are available as an add-on. Facade and roof coverings can be included, depending on project and logistics. Specific brands and profiles on request.

Charring rate 0.65 mm/min in accordance with Eurocode 5. Reaction to fire D-s2,d0 (untreated) or A2-s1,d0 (encapsulated). EI up to 120 minutes in standard build-ups.

Up to 13 m in height: WBDBO 30–60 minutes achievable without special measures. 13–30 m: encapsulation or sprinklers. Above 30 m: sprinklers almost always required. The functional fire-safety requirements of the Bbl are equivalent for timber and traditional building systems.

Exposed CLT = visible; fire resistance comes from the charring layer. Encapsulated = clad with gypsum or fibre board, allowing thinner CLT. A hybrid combination balances aesthetics and cost.

Standard build-ups achieve 30–120 minutes EI depending on layer thickness and cladding. Specifications per build-up on request.

DnT,A,k ≥ 52 dB for airborne sound, Lnt,A,k ≤ 54 dB for impact sound (between dwellings).

Not with bare CLT alone. With a floating screed + impact mat, build-ups achieve Rw up to 65 dB.

Concrete is heavier (mass = better sound insulation); CLT is harder (impact sound is more challenging). With correct decoupling, CLT build-ups reach 53–58 dB Rw at roughly 80% of the weight of a concrete equivalent.

Floor finish → screed → impact mat → CLT 100–180 mm → resilient hangers → suspended ceiling. Total thickness indicatively 250–350 mm.

CLT party wall 55–60+ dB Rw with double gypsum + mineral wool. Timber-frame double-wall construction achieves 52+ dB Rw.

NEN-EN-ISO 12354 substantiation on request; we are working towards supplying this as standard.

KD spruce up to max 16% moisture content, PE foil and roof caps during transport, quickly wind- and watertight, vapour-open membrane (pro clima SOLITEX), bio-based insulation as a moisture buffer.

Vapour-open principle — Ubakus-calculated to "no condensate" under Dutch climate conditions.

Panels remain packed, vertical walls first, assembly stops at >15 minutes of heavy rain, tarp cover during interruptions. Weather-tight within 5 days.

Standard target n50 < 0.6 (passive-house level). Best measured in Latvia: n50 = 0.24.

Sensors (SmartSense, Vibes) can be integrated as an add-on, not standard.

Requires >20% moisture and oxygen. Build-ups stay dry with correct detailing. Lifespan indicatively >75 years; the ETA certification assumes a technical lifespan of approx. 50 years with correct application and detailing.

Production in SEMA, CNC on Hundegger. IFC exchange with architects as an add-on; we accept DWG/DXF/IFC as input.

Concept or preliminary design → indicative quotation. Definitive design → fixed-price proposal. Technical design freeze → production start. The earlier we join, the smoother the detailing.

Yes, as an add-on. For the Dutch signature this is complemented by a Dutch structural engineer (EUREX-certified or equivalent).

We work at LOD 300 for production. For coordination with MEP and interiors we deliver models that your BIM coordinator can integrate.