Unfortunately, the polyurethane foam he used is inherently unstable.

不幸，他聚氨酯泡沫天生不稳定。

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聚氨酯泡沫缝剂时，释放易燃气体局部积聚达到可燃条件。

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

实际上就到喷涂泡沫保温材料，聚氨酯泡沫。

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

这包括3.9英寸挤塑聚苯乙烯泡沫和5.9英寸喷涂聚氨酯泡沫。

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，房子一部分挤塑聚苯乙烯泡沫保温，另一部分则喷涂聚氨酯泡沫保温，这里就在墙上。