The cTrap cloth is installed indoors on the surfaces from which the emissions are being spread. The cTrap can be used on all types of surfaces. Please contact a professional damage investigator to locate the source of the emissions.

For detailed description, see installation instructions,  and  instagram for typical cases.

Any questions concerning installation of cTrap? We are happy to help!

Floor installation

The cTrap is rolled out. The fluffy side should be against the structure so that the printed “cTrap” is visible after installation. The cloth is taped at edges and seams to keep it in place. Immediately afterwards, the cloth is secured with a suitable surface layer 

Wall installation

The cTrap is attached to the wall with staples and/or lists. The cloth is taped at edges, joints and at penetrations. Immediately afterwards, the cloth is secured with a suitable surface layer

Ceiling installation

cTrap is attached to the ceiling with staples and/or lists. The cloth is taped at edges, joints and at penetrations. Immediately afterwards, the cloth is secured with a suitable surface layer


The residents suffered from symptoms such as fatigue, skin irritations etc. An elevated concentration of 2-ethylhexanol (63 μg/m3, directional measurement against floor) was measured. After a cTrap floor installation, the symptoms disappeared and the concentration dropped to 1.5 µg/m3. 6 years later, the same low level was found – and the residents were still free from symptoms

Cultural building

PAH in an old property with tar products in the walls gave a deviant smell inside the building. The smell remained even after the tar had been removed

Measured PAH: 1726 ng/m3
(naphthalene, acenaphthylene, acenaphthene, fluorene, phenanthrene, anthracene, fluorants, pyrene, biphenyl, dibenzofuran).

An important factor in the choice of remedy was that the cTrap fabric is open to diffusion. The cloth was installed on about 75 percent of the wall surface and after the remedy, there are no complaints regarding odor.

Measured PAH = 139 ng/m3

80 Apartments

A newly built property where surface layers had been installed with building moisture left in the construction. This gave off a strong aberrant odor, and moisture-induced emissions could be measured in an investigation. The existing surface layer was removed, cTrap was installed and new surface layer was loose laid. ”Before the renovation the surface emission rate varied between 55 – 64 μg/m2h for 2-EH and between 65 – 130 μg/m2h for C9-C10 alcohols. After renovation these compounds could no longer be determined (the emission rate was under determination limit of 1 μg/m2h) ” (directional measurements with FLEC; Pitkäranta/Lehtimaa, 12th Nordic Symposium on Building Physics 2020)


Part of this hospital was to be renovated and converted into teaching facilities. In the old sections there were previously large cold rooms where tar products had been used as capillary barrier in the wall construction. 
As a precaution, cTrap was installed to prevent residual substances in the structure from reaching the indoor air in the classrooms

Office building

There was a strong mold-like odor in the stairways. Examination showed that the wooden structure had previously been impregnated with an agent that can emit chloroanisoles.
To get rid of the problem, a cTrap wall installation was done and after the action no smell is experienced.
cTrap is used to an increasing extent to solve odor problems caused by chlorophenols and chloroanisoles.

Town hall

Casein containing concrete gave a deviant and disturbing odor. cTrap was installed on all surfaces and then an LVT click floor was laid. After action, the odor problems ceased

Apartment with penetrating tobacco smoke

Residents of this apartment complained about the smell of smoke from the neighbor in the apartment below.

The cTrap was installed on the existing floor and a new wooden floor was laid as a surface layer.

Residents reported that the smell disappeared after the measure.

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