CE and ETA certified timber structures
Certification supports compliance with European requirements and project documentation for architects and developers.
ZTC experience and production facts
35+
years of experience
400+
completed projects
14
European countries
±1 mm
CNC precision
What CE and ETA mean in practice
CE marking and ETA-21/0014 show that the ZTC timber construction system has been assessed against European requirements. This supports compliance in the project but does not guarantee all local approvals. FSC and PEFC are available on request. ISO certification is not claimed. See Hundegger CNC production and CLT panels.
Certification and material status
The points below are factual statuses, not legal guarantees for all project requirements.
CE marking
For the ZTC timber construction system.
ETA-21/0014
European Technical Assessment.
FSC
Available on request.
PEFC
Available on request.
ISO
Not claimed / not listed in the offer.
What certification covers and what it does not
The system supports
- Use of a CE-marked timber construction system in the project.
- ETA-21/0014 as a technical basis for European projects.
- FSC or PEFC material requests by agreement.
Review separately
- All local building authority or export market approvals automatically.
- ISO certification — it is not claimed.
- Architectural drawings and foundation construction — ZTC does not provide these.
Why this matters for architects
Project documentation
A certified system supports technical justification.
European projects
Experience across 14 European countries with a factory in Latvia.
Material origin
FSC and PEFC available on request.
No overstatement
ISO is not claimed — only verified facts are stated.
Related ZTC projects
Private residence
Precision Meets Recognition: Building for an Architect
Gelderland, Netherlands
View project
Private residence
Commitment & Trust – Building Homes Through Challenges
, Sweden
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Developer project
Industrial Facility Facade with CLT and Infill Panels
, Latvia
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Private residence
Authentic-Style Two-Storey House
Amsterdam, Netherlands
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Private residence
Modern Coastal House with Curved Timber Structures
Akershus, Norway
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Private residence
Sustainable Engineering: The CLT & SiOO:X Home
Leinster, Ireland
View projectRelated topics
- Hundegger CNC productionHundegger CNC production at the ZTC factory in Latvia with ±1 mm precision for timber structural elements.
- CLT panelsCLT panels for timber construction: technical parameters, applications and ZTC factory production experience.
- Timber frame panelsTimber frame panel production at the ZTC factory in Latvia: from structural solution to transport and assembly.
- Timber engineering for architectsTimber structure technical coordination for architects — system options, interfaces and manufacturing solutions.
Frequently asked questions
Questions about certification, technologies and comparisons.
ZTC uses mineral wool, cellulose insulation and wood fibre insulation. The company has an industrial Isofloc system for blowing cellulose and wood fibre insulation.
ZTC uses mineral wool, cellulose insulation and wood fibre insulation. The company operates an industrial Isofloc system for blowing cellulose and wood fibre insulation.
Panels are connected with long screws or special timber connectors. A wind barrier is used externally, a vapour control layer internally, and membranes are carefully taped across the building.
Panels are connected with long screws or special timber connectors. A wind barrier is used externally and a vapour control layer internally, with membranes carefully taped across the building.
Airborne sound insulation in timber houses can be very good, especially with cellulose or wood fibre. Impact sound in intermediate floors should be addressed with appropriate floor and ceiling solutions.
Airborne sound performance in timber houses can be very good. Impact sound in intermediate floors is addressed with appropriate floor and ceiling solutions.
For houses up to around 3 storeys, timber frame is often more economical. CLT may suit load-bearing structures, hybrid solutions or where exposed solid timber walls are desired.
For houses up to around 3 storeys, timber frame is often more economical. CLT may suit load-bearing structures, hybrid solutions or exposed solid timber walls.
ZTC houses are designed for a service life of at least 50 years. The standard warranty is 3 years, but in some cases it may be possible to agree an extension to 5 years.
Houses are designed for a service life of at least 50 years. The standard structural warranty is 3 years. In some cases an extension to 5 years may be considered where supported by material suppliers.
ZTC manufactures and assembles houses itself, has experience since 1991, CE and ETA-21/0014 certification, Hundegger CNC precision of ±1 mm and an industrial insulation installation system.
ZTC manufactures and assembles houses itself. The company has experience since 1991, CE marking and ETA-21/0014, Hundegger CNC precision of ±1 mm and an industrial Isofloc insulation system.
Need certification information for a project?
Contact ZTC for technical documentation and system suitability for your project.