House treated for woodworm and now unliveable due to the chemical smell

Eldi_Dos

@Joedavis

The reason I asked about the temperature of the room when you go in first thing in the morning is I have found that temperature has a large effect on the voliatility of chemicals and this may be having a bearing on what you are experiencing.

Myself I steer well clear of the chemical sections in garden centres during the hot month's, especially if they have a glass roof as I find it noticeable to come across symptoms similar to you describe, and that is with chemicals in well sealed containers, so I do not think anyone believes this is not a real problem.