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Multi-storey construction

Timber construction systems for multi-storey buildings

CLT, timber frame and hybrid systems for multi-storey projects — with early feasibility review.

ZTC experience and production facts

34+

years of experience

400+

completed projects

14

European countries

±1 mm

CNC precision

Suitable timber systems for multi-storey buildings

Multi-storey projects often use CLT structures, hybrid solutions or infill façades on a primary frame. Fire, acoustic and moisture protection must be designed for the specific build-up. See CLT panels, infill façade panels and CE/ETA certification.

Multi-storey timber system parameters

Parameters depend on the specific project and wall/roof build-up — not every eight-storey building automatically meets the values below.

Up to 8 storeys

CLT structures up to 8 storeys as a ZTC capability.

Fire design

Up to EI 120 where the designed system supports it.

Acoustics

Up to Rw 65 dB where the designed build-up supports it.

CNC precision

Hundegger processing at ±1 mm.

Fire, acoustic and logistics planning

Fire design

Solutions up to EI 120 according to the project.

Acoustics

Rw up to 65 dB where the build-up supports it.

Moisture planning

Protection and drying periods on site.

Assembly

Approximately 3–5 days per floor where applicable.

Early feasibility checklist

Reviewed in the project

  • Number of storeys, loads and geometry.
  • Fire and acoustic targets.
  • Moisture protection and site logistics.
  • Intended scope of supply and assembly model.

What ZTC does not claim

  • Automatic suitability for every multi-storey project.
  • Planning approval is not guaranteed.
  • Fixed lead times without project readiness review.
  • ISO compliance is not claimed.

What partners say about working with ZTC

Google reviews highlight manufacturing quality, organised workflows and professional collaboration on development and export projects.

Google review

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.

Google review

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.

Google review

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.

Frequently asked questions

Answers about technologies, warranty, energy performance and the construction process.

Is your multi-storey project suited to timber?

Send project information for an early feasibility review.