Timber Construction Market DACH 2026: Industrialization, High-rises and Circular Economy
Timber construction in the German-speaking region is undergoing a phase of technical consolidation and market-side expansion in 2026. Cross-laminated timber (CLT), glued laminated timber (GLT) and hybrid timber components have become established in multi-story residential construction. The global CLT market reached a volume of $8.1 billion in 2026 and is forecast to grow to $11.23 billion by 2035 – an average annual growth of 12.77% (Spherical Insights 2025). In the DACH region, the market is concentrated on five major players: KLH (Katzbeck-Lengauer-Holz), Stora Enso, Binderholz, Mayr-Melnhof Holz and Schilliger Holz. These companies have combined production capacities of approximately 1.8 million cubic meters of CLT and GLT per year.
Technical development in 2026 focuses on three priority areas: First, the static optimization of CLT panels for spans exceeding 8 m with reduced material cross-sections. Second, normative assurance of timber high-rises over 22 m building height according to MHolzBauRL (Model Timber Construction Directive) and DIN EN 1995-1-1 (Eurocode 5). Third, the integration of timber components into life cycle assessments according to EN 15804 with quantified CO₂ storage performance. Timber construction thus becomes the first building system that fulfills a documented climate protection function alongside its structural function – a paradigm shift in building material evaluation.
Market dynamics show regional differentiation: Austria has a timber construction share of 23% in multi-story residential construction (as of 2025), Germany 19%, Switzerland 31%. These differences result from divergent subsidy programs, fire safety requirements and acceptance levels among institutional investors. Vienna is positioning itself in 2026 as Europe's center for timber high-rises with the Donaumarina Tower (113 m, completion 2027) and HoHo Vienna (84 m, realized 2019). The technical experience from these projects flows into standardization work and defines new benchmarks for hybrid timber-concrete constructions.
Cross-Laminated Timber CLT: Product Definition, Manufacturing and Technical Properties
Cross-laminated timber (CLT) consists of crosswise bonded board layers (typically 3, 5, 7 or 9 layers) made from debarked, technically dried softwood boards. Manufacturing is carried out according to EN 16351:2021 with defined wood moisture (12% ± 2%), board thicknesses (20 mm, 30 mm or 40 mm depending on manufacturer) and bonding type (PUR glue according to EN 15425, melamine-urea formaldehyde glue according to EN 301). The bulk density is 480 kg/m³ for spruce CLT, the characteristic bending strength is 24 N/mm² parallel to the fiber direction of the face layers. The thermal conductivity is λ = 0.13 W/(m·K) (EN ISO 10456), whereby a 200 mm thick CLT panel achieves a U-value of approximately 0.65 W/(m²·K) – supplementary insulation is mandatory for GEG requirements (U ≤ 0.24 W/(m²·K) for external walls).
Manufacturing processes differ between manufacturers primarily in press time and press pressure control. Binderholz uses modified melamine resin for CLT BBS (Brettsperrholz Binderholz System) with press times of 24 hours at 0.8 N/mm² press pressure. KLH uses a PUR cold-gluing process with press times from 90 minutes, which enables higher cycle times. Stora Enso uses a hybrid process with mechanical pre-tension of the cross layers before gluing, which reduces internal stresses. These process differences manifest in dimensional accuracy: The permissible thickness tolerance according to EN 16351 is ± 2 mm for panels up to 300 mm thick, leading manufacturers achieve ± 1 mm over widths of 3.5 m.
Stora Enso offers CLT panels in strength classes C24 and C30 (according to EN 338) with panel thicknesses from 60 mm to 400 mm. The maximum panel length is 20 m (factory transportable up to 16.5 m), the width is 3.5 m. Mayr-Melnhof Holz produces CLT elements with integrated CNC machining for window and door openings, electrical installation channels and fastener holes. This prefabrication reduces on-site assembly time by 60% compared to conventional construction. The area performance of modern CLT press systems reaches 250,000 m² per year – a single system can thus supply 1,200 residential units with 80 m² living area.
CLT Strength Classes and Load Limits According to EN 16351
Static design of CLT is carried out according to EN 1995-1-1:2010-12 (Eurocode 5) with consideration of board orientation in face and cross layers. For floor elements, 5-layer structures with 40-20-40-20-40 mm layer thicknesses (total thickness 160 mm) are typically used. The characteristic bending strength parallel to the main load direction is 24 N/mm², perpendicular to the main load direction 4.8 N/mm². The modulus of elasticity parallel to the grain is E₀,mean = 11,000 N/mm², the shear modulus is G = 690 N/mm². These parameters enable spans up to 7 m under residential use (qk = 2.0 kN/m²) without additional reinforcement. For industrial floors (qk = 5.0 kN/m²), 7-layer structures with 240 mm total thickness or GLT rib reinforcements are required.
The compressive strength perpendicular to the panel plane is fc,90,k = 3.0 N/mm² for C24 CLT. This value is relevant for wall elements in multi-story buildings. A 100 mm thick CLT wall element carries 300 kN/m wall length under characteristic load. For an eight-story residential building with 3 m story height and 4 kN/m floor load, this results in a load of 96 kN/m on the ground floor wall element. The permissible load according to partial safety concept (γM = 1.3 for timber) is 230 kN/m – the wall thickness of 100 mm is sufficient. For a nine-story project in Zurich, Mayr-Melnhof Holz used 140 mm CLT walls and thus achieved load reserves of 35%.
| Manufacturer | Product Name | Max. Panel Thickness [mm] | Max. Length [m] | Bulk Density [kg/m³] | λ-Value [W/(m·K)] | Strength Class |
|---|---|---|---|---|---|---|
| Binderholz | CLT BBS | 400 | 20.0 | 480 | 0.13 | C24/C30 |
| KLH Massivholz | KLH CLT | 500 | 16.5 | 485 | 0.13 | C24 |
| Stora Enso | CLT Elements | 400 | 20.0 | 480 | 0.13 | C24/C30 |
| Mayr-Melnhof Holz | LIFE CLT | 360 | 18.0 | 475 | 0.13 | C24 |
| Schilliger Holz | Swiss Krono CLT | 300 | 16.0 | 480 | 0.13 | C24 |
Glued Laminated Timber GLT and Structural Solid Timber KVH: Load-Bearing Systems for Spans Exceeding 10 m
Glued laminated timber (Glulam) consists of surface-bonded board laminations of equal fiber direction. Manufacturing is carried out according to EN 14080:2013 with strength classes from GL 24h to GL 32h (h = homogeneous, all laminations of equal strength class) and GL 24c to GL 32c (c = combined, higher-grade laminations in edge zones). The characteristic bending strength of GL 24h is fm,g,k = 24 N/mm², of GL 32h fm,g,k = 32 N/mm². The modulus of elasticity parallel to the grain is E₀,g,mean = 11,600 N/mm² (GL 24h) or 14,200 N/mm² (GL 32h). These values enable spans of 15 m to 25 m for roof structures and industrial buildings.
Manufacturing is carried out through finger-joint connections (according to EN 385) of individual board laminations into endless strands, which are then bonded in press systems under 0.6 N/mm² to 1.0 N/mm² press pressure. Binderholz uses melamine resin adhesives of strength class I for GLT beams (for load-bearing purposes in all moisture conditions), Schilliger Holz uses modified PUR glues. The lamination thickness is typically 40 mm, allowing beam cross-sections to be built up in 40 mm increments. Standard cross-sections range from 80 mm × 200 mm to 240 mm × 1,400 mm. Pollmeier introduced spruce G-LVL (Glued Laminated Veneer Lumber) in 2025, which is positioned between classic GLT and BauBuche (beech wood LVL) and achieves bending strengths of 44 N/mm².
Structural solid timber (KVH) according to DIN 4074-1:2012-06 presents an alternative for smaller cross-sections. KVH is made from technically dried solid wood (moisture 15% ± 3%) with defined wood qualities. Sorting is carried out visually or mechanically according to load-bearing capacity. KVH Si (visible quality) corresponds to sorting class S10 with fm,k = 20 N/mm², KVH NSi (non-visible quality) to class S7 with fm,k = 14 N/mm². The maximum cross-section dimensions are 100 mm × 240 mm, the lengths are 13.5 m. For roof rafters, purlins and wall studs in timber frame construction, KVH is more economical than GLT; for beams with 6 m span, GLT becomes essential.
GLT Manufacturer Directory DACH 2026 According to Studiengemeinschaft Holzleimbau
The Studiengemeinschaft Holzleimbau e.V. (Wuppertal) publishes a quarterly directory of certified GLT manufacturers. As of January 2026, 47 operations in Germany, Austria and Switzerland are listed. Certification includes self-inspection according to EN 14080, third-party inspection by accredited testing facilities (MPA Stuttgart, Holzforschung Austria) and conformity documentation for the CE mark. The leading manufacturers by annual production are: Binderholz (280,000 m³), Mayr-Melnhof Holz (210,000 m³), Schilliger Holz (85,000 m³) and Pollmeier (65,000 m³ including G-LVL). Smaller regional suppliers such as Hasslacher Norica Timber (Carinthia) and Rubner Holzbau (South Tyrol) serve specialized segments such as arch beams and custom structures.
Binderholz offers GLT in strength classes GL 24c to GL 32h with visible and industrial quality. The widths range from 60 mm to 240 mm (60 mm available in pairs only), heights from 120 mm to 2,000 mm, lengths up to 30 m (typically up to 18 m due to transport and assembly constraints). Schilliger Holz supplies GLT GL 24h with wood species spruce/fir in normal quality (SI = visible) and industrial quality (NSI). The moisture content upon delivery is 12% ± 2%, which corresponds to equilibrium moisture at 20 °C and 65% relative humidity. This moisture management minimizes swelling and shrinkage deformations in the installed state to less than 0.2% in the fiber direction and 3.5% perpendicular to the fiber.
Wood Fiber Insulation Boards and Wood Hybrid Components: System Integration for U-Values Below 0.15 W/(m²·K)
Thermal upgrading of CLT and GLT constructions in 2026 is primarily carried out with wood fiber insulation boards according to EN 13171. The thermal conductivity is λD = 0.038 W/(m·K) to 0.042 W/(m·K) depending on bulk density (140 kg/m³ to 230 kg/m³). Steico offers diffusion-open insulation boards (sd-value 0.05 m to 0.15 m depending on thickness) that are applied directly to CLT external wall panels. A 240 mm wood fiber insulation on 100 mm CLT wall achieves a U-value of 0.14 W/(m²·K) – compatible with KfW-40 standard and passive house requirements (U ≤ 0.15 W/(m²·K)).
Wood hybrid components combine CLT load-bearing structure with mineral layers for fire protection, sound insulation or thermal mass. Typical floor assemblies: 160 mm CLT + 60 mm dry screed + 30 mm impact sound insulation (sd-value ≥ 5 m) + 12.5 mm gypsum fiberboard. This assembly achieves a weighted impact sound level of Ln,w = 46 dB (requirement according to DIN 4109: Ln,w ≤ 53 dB for residential floor separations). The area-related mass is 192 kg/m², of which 77 kg/m² comes from CLT. For higher sound insulation requirements (Ln,w ≤ 40 dB), 80 mm wet screed or concrete overlays are used – timber construction then partly loses its weight advantages over reinforced concrete.
Stora Enso develops CLT wall modules with integrated installation layer: A 40 mm installation layer between two CLT panels accommodates electrical lines, water pipes and ventilation ducts. The total thickness is 180 mm (60 mm CLT outside, 40 mm installation, 80 mm CLT inside). This solution eliminates subsequent cutting and preserves the air-tightness layer (n₅₀ ≤ 0.6 h⁻¹ for passive house). Binderholz offers prefabricated CLT roof elements with integrated above-rafter insulation – assembly of a 150 m² roof takes six hours, conventionally it would take three days.
Top Timber Construction Manufacturers DACH 2026: Capacities, Specializations and Market Shares
KLH Massivholz (Katzbeck-Lengauer-Holz, Teufenbach/Styria) is the pioneer of industrial CLT production since 1998. Annual capacity is 350,000 m³ of CLT panels. KLH uses a PUR cold-gluing process without formaldehyde emissions (E0 classification according to EN 717-1). Reference projects include the Lifecycle Tower ONE in Dornbirn (8 stories, 27 m, realized 2012) and Forte Living Melbourne (10 stories, 32 m, 2012). In 2026, KLH is working on CLT elements with integrated carbon fiber layers for spans exceeding 12 m with reduced construction height – an approach primarily relevant for schools and office buildings with large room depths.
Stora Enso operates CLT plants in Bad St. Leonhard (Carinthia) and Ybbs (Lower Austria) with combined capacity of 450,000 m³ per year. The company focuses on Building Information Modeling (BIM) for automated manufacturing: Architectural models are directly transferred to CNC controls, tolerances are ± 0.5 mm. Stora Enso is supplier for the HoHo Vienna project (84 m, 24 stories, 75% timber content) and the Donaumarina Tower (113 m, planned completion 2027). Technical innovation lies in hybrid CLT-concrete floors with integrated reinforced concrete overlays for sound insulation – the timber share is 60%, the thermal mass is increased by 140 kg/m².
Binderholz (Fügen/Tyrol and Unternberg/Styria) produces 280,000 m³ GLT and 180,000 m³ CLT per year. The company pursues a full-range strategy: from sawn timber to GLT to CLT from a single source. Binderholz CLT BBS is offered in strength classes up to GL 32h – relevant for long-span floors in schools and halls. A pilot project in Innsbruck uses GL 32h CLT for 9.5 m span without beams with 7-layer assembly (280 mm total thickness). Mayr-Melnhof Holz (Leoben/Styria) is at 210,000 m³ GLT annual capacity and cooperates with Züblin in hybrid high-rise construction. Schilliger Holz (Küssnacht/Switzerland) primarily serves the Swiss market with 85,000 m³ GLT GL 24h and focuses on public clients.
Market Shares and Regional Distribution 2026
The DACH market for CLT and GLT is distributed in 2026 among four regions: Austria 42% market share (primarily export production to Germany and Switzerland), Germany 38% (high domestic demand, moderate export quota), Switzerland 14% (high import quota from Austria), South Tyrol/Italy 6% (specialized in wood hybrid prefabricated houses). The average timber construction share in multi-story residential construction is 31% in Switzerland, 23% in Austria, 19% in Germany. These differences correlate with subsidy programs: Switzerland provides no direct timber construction subsidies, but achieves high shares through cantonal building codes (timber construction mandatory for public buildings in Zurich and Basel). Germany subsidizes through KfW-40-Plus programs, which are material-independent – timber construction benefits indirectly through lower manufacturing costs for high insulation standards.
Fire Protection in Timber Construction: Fire Resistance F-30 to F-90 and Model Timber Construction Directive 2026
Fire protection defines the technical limits of timber construction in the multi-story sector. The Model Timber Construction Directive (MHolzBauRL, March 2024 edition) permits buildings of building class 5 (high-rises over 22 m) in timber construction under defined protective measures. Central requirements: Fire resistance of load-bearing components at least F 90-AB (highly fire-resistant, made of non-combustible materials), external walls A2-s1,d0 (non-combustible), fire walls REI 90-M (room enclosure, integrity, insulation). Timber constructions meet these requirements through encapsulation with gypsum fiberboards, gypsum plasterboards (type F according to EN 520) or wood-based boards with tested burn behavior.
The burn rate of solid timber and GLT is 0.7 mm/min (characteristic value according to EN 1995-1-2). A CLT floor with 160 mm thickness achieves fire resistance of R 90 (load-bearing capacity 90 minutes) without cladding – the outer 63 mm carbonize, the remaining core cross-section of 97 mm continues to bear load. For REI 90 (room enclosure additionally), cladding with 2× 15 mm gypsum fiberboards (ρ = 1,150 kg/m³) is required. Binderholz has test certificates for CLT walls F 90-B (combustible materials permitted) with 120 mm CLT + 2× 18 mm Fermacell gypsum fiberboard on both sides. This wall construction weighs 168 kg/m² compared to 425 kg/m² for an equivalent reinforced concrete wall (200 mm, C30/37).
For stairwells in timber high-rises, non-combustible cores of reinforced concrete are required (MHolzBauRL Section 5.3). HoHo Vienna uses a central reinforced concrete access core with attached timber floors – the core provides lateral bracing and fire protection. Stora Enso develops CLT stairwells with A2-s1,d0 cladding (calcium silicate boards 25 mm on CLT walls), which are being tested in 2026 in a pilot project in Hamburg. The cost of this solution is 28% above a conventional reinforced concrete stairwell – the advantage is avoiding wet construction processes and reduced construction time.
