Building Green: How to build with a proven sustainable indoor climate


Good acoustics, fresh air – and materials that contribute to a lower carbon footprint. The indoor climate is highly valued in documented sustainable buildings. At Building Green, Troldtekt A/S is hosting a Specialist Talk about the work to ensure a healthy indoor climate in the new Vrå Children’s and Culture Centre.

We spend most of our time indoors – in offices, schools and at home. That’s why a healthy indoor climate is so important when clients and consultants choose sustainability certification for their buildings. Under several of the leading certification schemes, the indoor climate is included on an equal footing with, for example, the building’s climate footprint.

At a Specialist Talk facilitated by Troldtekt for Building Green in Copenhagen, you can meet Kathrine H. Stærmose from AART architects and Hanne Tine Ring Hansen from Søren Jensen Consulting Engineers.

They share their knowledge of designing buildings with a healthy indoor climate. The featured case will be the new Vrå Children’s and Culture Centre, where Troldtekt with its excellent sound absorption properties helps reduce noise and creates good acoustics. In June, Nohrcon elected the Children’s and Culture Centre as the School Building of the Year 2022.

The Specialist Talk takes place on the first day of Building Green – Wednesday 2 November at 12.30–13.30.

Experience geopolymer-based test panels

At Building Green, you can also see a small-scale test version of Troldtekt acoustic panels where the cement has been replaced with geopolymer. Geopolymer is a binder based on silica/alumina compounds, which avoid the need to use chalk clinker. The production of chalk clinker emits large amounts of CO2, while other raw materials such as bio ash and crushed bricks can be used to make geopolymer.

The Danish Institute of Fire and Security Technology (DBI) is bringing the test panel to their stand (Stand 41). DBI and Troldtekt are currently collaborating on several projects aimed at investigating the potential of geopolymers more closely. You can read about one of these projects here.

Cradle to Cradle: From Silver to Gold

Choosing Troldtekt makes a positive difference to the indoor climate in schools, offices and other types of buildings where people’s well-being and comfort are in focus. For example, Troldtekt acoustic panels are documented free from substances harmful to humans or the environment. 

In spring 2022, the entire range of Troldtekt cement-bonded wood wool products – in natural wood/grey wood and painted in standard colours – advanced from Silver to Gold level under the Cradle to Cradle sustainable design concept. Switching to new paint formulas based on a new and more sustainable preservation technology was the catalyst for the improved certification.

EPDs: Full transparency on environmental footprint

Vrå Children’s and Culture Centre is pursuing DGNB Gold certification, where both indoor climate and the building’s environmental footprint are key factors.

Consultants and clients can now download environmental product declarations (EPDs) for 12 different varieties of Troldtekt acoustic panels. This makes it easier to find verified documentation of the environmental footprint of the Troldtekt solution forming part of a building.

The EPDs have been prepared in accordance with EN15804+A1, where it is only mandatory to provide data on production phases A1–A3. However, Troldtekt includes data from more phases in order to be as transparent as possible.

Among other things, the EPDs document carbon footprint and each take into account:

  • the thickness of the acoustic panels (25 mm or 35 mm)
  • the type of cement in the panels (FUTURECEM or conventional)
  • cement colour (grey or white)
  • whether the panels are painted or unpainted.

The new EPDs are available from the Troldtekt website.

Free download: How Troldtekt contributes to building certifications

Troldtekt also makes updated documentation packages available for free download.

The packages show Troldtekt’s contribution to certifications such as DGNB, the voluntary sustainability standard, WELL, BREEAM and LEED. The packages of documents have been prepared by Ramboll.

FUTURECEM™: Acoustic panels with a reduced carbon footprint

Using the new Troldtekt acoustic panels based on FUTURECEM cement, consultants can even choose Troldtekt with a reduced carbon footprint. The new panels have a carbon footprint that is 26 and 38 per cent lower than the carbon footprints of Troldtekt based on grey and white cement, respectively.

All Troldtekt cement-bonded wood wool panels based on grey cement – whether classic panels or the series of Troldtekt design solutions – are available based on FUTURECEM.