This building, from about 1850, was Lund University’s “chemistry center” and as such heavily polluted. The building is currently being converted into apartments.

In the building were detected, among other things, high air concentrations of polycyclic aromatic hydrocarbons (PAH) from the creosote used as an impregnation agent.

As the building is considered to be of cultural and historical value, it is necessary to retain most of the original construction despite the wood preservative.


cTrap is installed to prevent harmful chemicals from the creosote from reaching the indoor air.

cTrap allows the emissions to leave the material and they are irreversibly adsorbed into the cTrap cloth.

cTrap is diffusion open to water vapor and thus does not affect the building’s moisture balance.

Installation of the cTrap cloth on ceilings and floors resulted in a reduction of PAH air concentrations to below limit values.