Timber Structural Engineering & Mass Timber
Design, calculation and optimisation for Passivhaus and high-performance projects
We develop efficient, safe and industrialisable timber structures, integrating advanced structural calculations, building physics and Passivhaus criteria.
CLT, GLT and LVL
Lightweight lattice
Hybrid systems
CTE and Eurocode 5
PHPP integration and hygrothermal analysis
Passivhaus
What is included in our structural timber engineering
Structural calculation and dimensioning
- Complete calculation according to CTE and Eurocode 5
Limit state verification (ELU / ELS)
Verification and justification by fire
Joint design and verification
Wind and seismic actions
Technical modelling and optimisation
3D structural modeling (Cadwork / Timbertech)
Generation of manufacturing drawings
Optimisation of sections and meetings
BIM coordination with architecture and facilities
Design for industrialisation and prefabrication
Passivhaus integration and hygrothermal control
PHPP analysis by structural typology
Calculation of structural thermal bridges
Hygrothermal simulation (WUFI)
Continuity of sealing design
Compatibility with Passivhaus and EnerPHit standards
Benefits
Benefits of timber engineering
Advanced structural calculation
Mass Timber and structural systems
Passivhaus integration
Industrialisation
Expert technical team with over 20 years of experience
Work
Who we work with
Architects
Engineers
Technical promoters and self-promoters
CLT and Lightweight Framing Manufacturers
Specialist timber construction companies
About us
Our dedicated services
Feasibility studies
3D structural modelling
Complete structural calculation
Technical optimisation
Coordination with manufacturer
On-site support
Why
Why choose Zepassiv?
International experience in Passivhaus projects and high efficiency buildings
More than two decades working in Spain, the UK and Portugal on residential, public and private projects.
Specialists in Mass Timber and Lightweight Framing
Multidisciplinary team proficient in PHPP, WUFI, Flixo/THERM, TM59, comfort analysis and building physics.
Fully collaborative approach
We work closely with architects, engineering and construction companies, facilitating technical decisions at all stages of the project.
Risk reduction by design
We identify thermal bridges, damp, overheating and construction problems before they appear on site.
Cost and performance optimisation
We propose viable, efficient solutions aligned with energy objectives, regulations and certification (Passivhaus, EnerPHit, AECB, Net Zero).
Multilingual services
We facilitate communication in international teams or cross-border projects.
Testimonials
What they say about us
Jesús Menéndez is a wonderful person and a superb professional with extensive knowledge of the timber industry. He is also an excellent teacher of both structural engineering and energy efficiency. He runs a top-tier consulting firm specialising in the timber sector.
Client
Spain
FAQs
Frequent asked questions
Do you offer on-site supervision?
Yes, we provide technical support throughout the project.
Do you work with manufacturers?
Yes, we liaise directly with manufacturers.
Can you integrate the building structure and the PHPP?
Yes, we work on both the structure and energy efficiency at the same time.
Do you carry out full structural calculations?
Yes, in accordance with CTE and Eurocode 5.