I need Damp proof course on about 1 meter square area. The affected area is ground floor and only lower part of one wall. Just wanted to know, what’s involved in getting it sorted. I have come across some DIY kits to drill and inject some cream into the holes. Would you lot say that this sort of work would be in the scope of a moderate Diy’er? If I get a builder to sort it, what sort of cost would I be looking at?