New bamboo parquet oiled with spots by the professional!

Hello,

We had "vertical slat" bamboo parquet (light brown) raw installed in our new building by a professional. The parquet was oiled after installation and is now blotchy. The stains are not related to the different vertical parquet slats, but rather appear like light and dark splashes on the floor or even stripes.

After a complaint, the installation company made local repairs and oiled it again (for the 4th time). There was no change. The professional also has no explanation for this. He said that there are supposedly no guidelines for industrial parquet in this regard. However, it is not about the differences of the individual slats, but about the blotchy appearance after oiling. We then left the floor undisturbed for 11 days to see if the stains would disappear - but there was no change.

My question: What can we do now? Should he have used a different oil for bamboo?

Thank you very much for the help

Was it glued parquet or prefinished parquet?

Hello missosoup

The bamboo vertical lamellae consist of narrow strips of bamboo tubes. These are first glued together. If such pieces are then processed as glued parquet across the surface, glue residues could also block the surface. Either from the surface gluing or from production. Therefore my question: was the parquet sanded before oiling or not? If not, then the problems could come from that.

Bamboo parquet only absorbs a little oil. Water can completely block the already low absorption capacity. In the end, the emulsified oil floats on the surface and has to harden there somehow. That does not look good visually – but it is also hardly the right choice in terms of application.

Therefore, the bamboo parquet must be sanded so that it is ready to absorb. Important: Do not use high solid oil – but use a deeply penetrating, solvent-containing oil that, however, contains sufficiently hardening oils and resins.

Then I would also follow up again with the parquet manufacturer. Normally, the datasheets or instructions should be able to advise what they recommend for treating their products. Especially regarding the pretreatment.

If the "light brown" tends more toward a "coffee brown" – that is, rather dark than light – then with film-forming oils the problem arises that any mechanical stress becomes visible.