Perlite-filled bricks (polystyrene, pesticides)

Hello everyone,

we are considering using perlite-filled bricks. However, I have already heard negative things about them from two different construction companies:
- Polystyrene is used in the manufacturing process, so the bricks would contain "poison-filled gas chambers."
- The perlite is treated with pesticides.

I was able to verify on the internet that polystyrene is used in the manufacturing, but not the other claims. Can anyone say something about this?

Thank you very much.

Perlite is mineral, volcanic glass. There are also stones filled with EPS (polystyrene). Or are there stones that contain both? I only know either or.

Why do people even do that? Just the hazardous waste generated during the pile work alone... You can take unfilled bricks to the recycling center.

EPS is not loose fill if my memory serves me right. There are advantages to filling the cavities instead of just sticking it on the outside.

Perlite is impregnated. Polystyrene is added a flame retardant that was replaced a few years ago with a less harmful one.

Perlite can be reused. EPS must be recycled. There are experiments with mealworms and a processing plant in the Netherlands. Polystyrene is supposed to be cleaned, melted down, and re-expanded. Melting down is supposed to take place on construction sites at some point to reduce transport volume.

EPS is not loose filling if my memory serves me right. There are advantages to filling the cavities rather than just plastering it on the outside.

You don’t need that anymore with today’s bricks, do you?

I think it depends on the standard and the concept. If you want a higher Energy Saving Ordinance without considering solar, photovoltaics & Co, it won't be possible otherwise. Or because of sound insulation