Prefabricated Timber & CLT Buildings
ZTC manufactures prefabricated timber-frame panels in Latvia, for residential and development projects across the UK and Ireland. From engineering and factory production to delivery and on-site assembly, we provide a coordinated structural package tailored to your project.
Years of experience
Completed projects
14 countries
Timber and CLT solutions for developers, architects and contractors.
Business Solutions
Engineered for the Future
ZTC timber-frame panels are engineered in SEMA and cut on Hundegger CNC machinery. Premium and Lux panels use wood fibre or cellulose with the Swiss Isofloc system; Comfort uses mineral wool. Our timber-frame building kit is CE marked under European Technical Assessment ETA-21/0014.
- Compliance
- The whole-building energy and regulatory assessment is completed for your project by the local architect and energy assessor.
- Efficiency
- A blower door result of n50 0.24 h⁻¹ has been recorded on completed projects. Testing is arranged by the client; results depend on the individual building.
- Flexibility
- Supplied as a closed panel shell for self-build, or fully installed with exterior finishing by our own team.
Build-Zone structural warranty route
Build-Zone is willing in principle to consider UK projects using the ZTC closed-panel timber-frame system for Build-Zone or Self-Build Zone structural warranty cover, subject to satisfactory underwriting and technical audit of each individual project. Its Letter of Intent dated 8 October 2026 confirms that ZTC is on its list of timber-frame suppliers considered suitable for structural warranty purposes. Build-Zone does not provide a formal type or system approval. Warranty terms and costs are assessed for each project; the letter does not guarantee a warranty or mortgage approval.
Download the Build-Zone Letter of Intent (PDF)Fabric first. Closed panel.
A fabric first home gets the building envelope right before adding technology: thick continuous insulation, high airtightness and moisture control. Premium and Lux use wood-fibre or cellulose insulation; Comfort uses mineral wool and a PE vapour control layer. We build that envelope as closed timber frame panels, insulated and sealed in our factory, then assemble them on your plot with our own crew.
Closed panel, factory insulated
Walls and roofs arrive insulated and sealed on both faces, with internal walls included. The house is wind- and watertight within days of assembly.
Premium and Lux insulation
Premium and Lux panels use wood-fibre or cellulose insulation with an external wood-fibre board and taped plywood joints inside.
Airtight by design
Taped joints and factory-sealed junctions. A blower door result of n50 0.24 h⁻¹ has been recorded on completed projects; results depend on the individual building.
Project-specific energy design
Standard wall U-values are 0.167 (Comfort), 0.136 (Premium) and 0.100 (Lux) W/m²K. The complete building is assessed for its design and applicable local requirements.
Carbon sequestration and circularity
A circle of life, not a life cycle
Timber stores the carbon the tree absorbed as it grew and keeps it locked in the structure for the life of the building. At the end of its life, the timber can be reused or recycled.
- 01
Forest
Trees absorb CO₂ as they grow. We use timber from sustainably managed Latvian and Scandinavian forests, FSC or PEFC on request.
- 02
Factory
CNC-cut panels made to ±1 mm in Latvia, with very little waste and no wet trades.
- 03
Home
The structure keeps that carbon locked away for the life of the building.
- 04
Reuse
At the end of its life the timber can be dismantled, reused or recycled, while new trees have already grown.
Back to the forest: replanted trees absorb CO₂ again.
Built around precision, experience and factory-controlled quality
35+ Years Experience
Established in 1991, ZTC has delivered more than 400 timber construction projects across 14 countries.
Factory-Controlled Production
Prefabricated wall and roof panels are manufactured in our 4,500 m² production facility under controlled factory conditions.
CNC Precision & Fast Assembly
CNC-controlled production and prefabrication allow accurate manufacturing, efficient logistics and faster assembly on site.
CE-Marked Building System
Our building system is supported by European technical assessment and CE marking, providing a documented technical basis for project-specific design and compliance.
Recent Projects
400+ completed projects — 14 countries
Sustainable Engineering: The CLT & SiOO:X Home
Ireland
Precision Meets Recognition: Building for an Architect
Netherlands
Modular House in Iceland
Iceland
Commitment & Trust – Building Homes Through Challenges
Sweden
Industrial Facility Facade with CLT and Infill Panels
Latvia
Material Harmony: The Interplay of Metal, Ash, and CLT
the Netherlands
What Our Clients Say
We are Premium Living AS in Norway and built two houses with this company. We were very satisfied. We sold the last project 2 years ago when I write this review, and the first house was built 4 years ago. With both houses, the production, planning and timing all went smooth and well organised. Right now, all three buyers are pleased, and we haven't received a single complaint about flaws or even blemishes. Even during the Covid lockdowns there was no doubt that our investments and cooperation with ZTC were solid. We recommend, and anyone that has questions can ask ZTC for our reference.
ZTC built my house in 2012, and they have done some reclamation work in two periods since then. Only positive experiences with ZTC! Good quality of workmanship and customer support.
Very good experience with all the ZTC staff. Easy to work with, very professional, fast and clear in answering any question during all the projects done. I can only recommend ZTC.
Two Technologies, One Supplier
Timber Frame Construction
- Factory-prefabricated insulated wall and roof panels
- Structural timber frame with insulation and membranes according to project specification
- Designed for efficient transport, rapid assembly and project-specific requirements
CLT Construction
- Cross-laminated timber panels for walls, floors and structural elements
- Suitable for projects where CLT provides structural or architectural advantages
- Can be combined with timber-frame construction where appropriate
Hybrid Timber Systems
Combining Timber Frame and CLT in One Integrated System
A CLT structural core with an insulated timber-frame envelope can reduce cost compared with a full CLT structure. We calculate the saving for each project. One contract, one point of accountability.
