Unfortunately, the polyurethane foam he used is inherently unstable.

不幸的是，他使用的泡沫天生不稳定。

Polyurethane foam sealant was used during construction at the first floor underground, releasing flammable gases that accumulated to reach combustible conditions.

地下一层施工作业中使用泡沫缝剂时，释放易燃气体局部积达到可燃条件。

It's actually the spray foam insulation I talked about, polyurethane foam.

实是我提到的喷涂泡沫保温材料，泡沫。

These include 3.9 inches of extruded polystyrene foam and 5.9 inches of spray polyurethane foam.

这包括3.9英寸的挤塑苯乙烯泡沫和5.9英寸的喷涂泡沫。

So, part of the house is insulated with extrusion polystyrene foam and part with polyurethane foam which is right here on the wall.

所以，房子的一部分使用挤塑苯乙烯泡沫保温，另一部分则使用喷涂泡沫保温，这里在墙。