About us

While we’re proud to have millions of square metres of installed subfloor systems under our belt, that’s far from what defines our success. Our focus is to constantly drive the development of smart subfloor systems. We make things easier and simpler for our customers by contributing our knowledge to find the best and most flexible solution for each unique need.

Consultative partner in the cooperation

Since our foundation in 1995, we have focused on problem solving, documentation and quality assurance.

Over the years, we have accumulated knowledge, experience and documentation that sets us apart in the market. Through valuable insights from our data, we continue to develop technical solutions that create greater value for our customers. We carry the knowledge we have acquired into each new project, making us a valuable consultative partner in our cooperation.

Cost-effective and easy installation

Our goal is to make the preparation and installation process easier and more efficient for our customers. We actively work to make it easier by supplying customised girders, with support blocks and dampening elements pre-assembled. Each girder is labelled with the room name and length that corresponds to the installation drawings for each apartment or other agreed area.

The Granab system is a dry installation method, which is installed on the concrete or CLT without wet surface levelling. This makes it flexible with wiring between the concrete/CLT and the floorboards. An easy installation reduces the total cost of the project and allows you to eliminate unexpected costs by streamlining site logistics.

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Technical developments in environment and acoustics

The Granab system has been developed in close co-operation with sound consultants in the construction industry to meet high environmental and sound requirements. The subfloor system is environmentally declared and has up to 50% less CO2 impact than concrete. The system fulfils the requirements of EN (Eurocodes), is type-approved by RISE in terms of sound-absorbing properties, dynamic load and strength. Environmental Product Declaration (EPD) is available on all our systems.

Our history

Since 1995, Granab has strived to deliver a sustainable product, and over the years we have evolved and developed new products that simplify and streamline the building process.

  • 1995

    Granab HB is established

    Starts making drawings. Deliver only full girder lengths.

    Patent for the 3000-system.

  • 1997

    Bygg- och Miljöteknik GRANAB AB is established

    limited liability company is formed. Bygg- och Miljöteknik GRANAB AB.

    Patent for the 7000-system

  • 1998

    First major project

    First major project.

  • 1999

    Customisation

    Starts to customise the subfloor system for each project.. Pre-cut girders.

  • 2003

    First project in Norway

    Is introduced on the Norwegian market.

    First major project in Europe.

  • 2004

    Sylodyn

    Together with the supplier, the dampening element Sylodyn is developed and optimised for Granab.

  • 2013

    9000-system

    Patent for the 9000-system and the different dampening elements.

  • 2014

    Type approval & office

    New type approval for all products.

    Land is purchased and planning is started for the construction of the current office.

  • 2015

    New office

    Relocation to current office

  • 2018

    Environment-EPD

    The first EPD is created.

  • 2019

    8000W-system

    Patent for the 8000W-system.

  • 2021

    Type approval S-8000W

    New type approval for the 8000W-system. Developed to enable the use of the same components in all systems.

  • 2024

    five unique sports floors

    Approval of five unique sports floors with regard to the combined elastic and load requirements according to EN Eurocodes.

  • 2025

    New website

    Launch of a brand new website, which clearly presents Granab’s products, applications and reference projects.

BYGG- OCH MILJÖTEKNIK
GRANAB AB

Vårgårda, Sweden

Contact us

Our office

For 30 years we have been in the heart of Västra Götaland, Sweden, providing supfloor systems to all kinds of building projects.

Granab’s
sustainability work

All our subfloor systems are environmental product declared (EPD), type approved and have up to 50% less CO2 impact than concrete.

Our sustainability work

About us
Presentation of Granab

Environmental certification

Granab works actively to reduce environmental impact and has certifications that confirm our commitment to sustainability. All our subfloor systems have Environmentally Product Declarations (EPD).