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
Consultancy
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)
Comprobación y justificación a fuego
Joint design and verification
Wind and seismic actions
Technical modelling and optimisation
Modelado estructural 3D (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 the wood engineering
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Advanced structural calculation
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Mass Timber and structural systems
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Passivhaus integration
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Industrialisation
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Expert technical team with +20 years of experience
Work
Who we work with
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Architectural studios
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Engineering
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Technical promoters and self-promoters
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CLT and Lightweight Framing Manufacturers
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Specialist timber construction companies
We
Our process
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Preliminary analysis and risks
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3D structural modelling
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Complete structural calculation
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Technical optimisation
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Coordination with manufacturer
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On-site support
Why
Why choose Zepassiv?
International experience in Passivhaus projects and high efficiency buildings
More than two decades working in Spain, UK and Portugal, with 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).
Trilingual service (ES / EN / PT)
We facilitate communication in international teams or cross-border projects.
Portfolio
Some of our recent projects
Find out how to Zepassiv accompanies professionals on the development of sustainable projects and Passivhaus certificates.
Testimonials
What they say OUR CLIENTS
With Zepassiv we were able to certify our first Passivhaus project in an agile and uncomplicated way.
Architect
United KingdomIts bilingual team greatly facilitated international coordination.
Promoter
SpainIts bilingual team greatly facilitated international coordination.
Architect
United Kingdom
FAQs
Frequent 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.
Spanish 
English 
Portuguese