No one seems to be blaming the Conservatives in Wales, Scotland, or NI ... why? Another product that was introduced into our building techniques, that originated in Europe(where they have the same problem). This stuff was originally developed to meet the massive rebuilding requirements after WW2 and the acute lack of dwellings. Cheap and cheerful always turns into expensive misery! I remember my old man shaking his head at the sight of aerated concrete breeze blocks and saying "never do a good job and there is plenty of work for everyone".