calling SHA experts dry fogging (2 replies)

today its dry fogging.

This company says for £1,200 [www.puremaintenanceuk.com] they will stop the mold in a ground floor end of terrace flat built circa 1900.

I thought it seems like a quick fix but not getting to the real problem and a very quick google search seems to suggest that BUT has anyone had any experience of it and is it worth £1,200 as that seems a lot of money for what it is.

Thank you in advance.