Pete recently did an interview on BBC Radio 4 - You and Yours - which investigated a case history of failed cavity wall insulation.
I haven't really done much on the site about maintenance - but the other day I was at a friends house and it rained. These two videos say it all. Without maintenance, houses suffer. You NEED to be very aware of any minor issues that can cause problems. You might not think a blocked gutter can cause problems, but believe me, they do.
The main issues we see that are ignored are these:
And now for the videos. You might think it's simple - but the owner of this house is a multi millionaire, owns a big estate, and just leaves all the other houses on the estate to crumble. No idea why, but it's stupid.