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Passivhaus Airtightness Solutions and Testing

BlowerDoor · AeroSeal · Leak Detection

Guarantee the airtightness of your Passivhaus projects with our specialised testing, diagnostic and advanced sealing services.

We work with architects, builders and developers seeking to control the n50 value, eliminate infiltration and optimise the building envelope.

  • n50 airtightness tests

  • Technical consultancy

  • Airtightness solutions with AeroSeal

  • BlowerDoor equipment for sale and rental

  • Advanced infiltration diagnostics

Speak to
one of our experts

PASSIVHAUS

What is included in our
airtightness service

  • ensayos y hermeticidad 1

    Airtightness tests (BlowerDoor)

    • Preliminary on-site testing

    • Final test for Passivhaus certification

    • Infiltration measurement n50

    • Air leakage diagnosis

    • Gas retention time testing

  • Ensayos y hermeticidad 2

    Diagnosis and optimisation of the envelope

    • Smoke leak detection

    • Infrared thermography

    • Partial pressurisation testing

    • Review of construction junctions

    • Sealing and envelope improvement plan

  • Ensayos y hermeticidad 3

    Advanced sealing technologies from

    • AeroSeal

    • Manual Passivhaus sealing

    • Sealing of service penetrations

    • Preparing the building for testing

Benefits

Benefits of our
sealing solutions

Ensayos y hermeticidad 4

  • Precise control of the n50 value

  • Improved energy efficiency

  • Thermal comfort and air quality

  • Advanced leak detection

  • Preparation for Passivhaus certification

    • Request
    consultancy services

CLIENTS

Who do we
work with

  • Architects & Passivhaus consultants

  • Specialised construction companies

  • Developers

  • Self-builders

  • Energy engineering and consulting firms

zepassiv

Our
process

Request
consultancy services

  • Preliminary analysis

  • On-site diagnosis

  • BlowerDoor Test

  • Location of leaks

  • Sealing and optimisation

  • Final technical report

Request
technical consultancy

EXPERIENCE

Why work
with us?

  • Passivhaus airtightness specialists

    Consultants with real experience on certified projects.

  • Advanced technologies

    We apply systems such as AeroBarrier and AeroSeal.

  • Measuring equipment hire

    BlowerDoor equipment and diagnostic tools available.

  • Advanced tests

    Thermography, smoke, cleanrooms, gas retention time and window/door permeability.

  • Certification support

    Full support to meet Passivhaus and EnerPHit requirements.

  • International Experience

    We facilitate communication in international teams or cross-border projects. Zepassiv is active in 15 countries.

Portfolio

Some of our
recent projects

Find out how Zepassiv supports professionals in the
development of sustainable projects and Passivhaus-certified projects.

Airtightness services for Passivhaus projects

Ensure the energy performance of your building with n50 testing, advanced diagnostics and professional sealing solutions.

Request information without obligation

Testimonials

What our clients
say about us

  • Amazing technology, difficult to get to work, but Great when it is.

    Home Owner

    UK

  • Amazing technology, difficult to get to work, but Great when it is.

    Home Owner

    UK
  • Read more testimonials

FAQs

Frequently asked
questions

Yes, we operate throughout the UK, Spain and Latin America.

AeroBarrier seals invisible leaks and micro-leaks that cannot be detected by hand.

Yes, both, and training is included.

Yes, it allows you to obtain n50 values that meet Passivhaus criteria.

Yes, we are specialists and we work in certification.