My daughter is a student and the house she shares is damp and full of fungus on the walls. Her room is the worst. When I went to pick her up for the Christmas holidays I took a plastic spray bottle of Borax and water (just put enough Borax in so that no more will dissolve). I sprayed the walls with it when I arrived and then wiped all the fungus off. After helping her pack I sprayed the walls again and just left them to dry. This was a last ditch attempt to make things better because the landlord would not do anything.
When I took her back after Christmas I didn't know what we would find but imagine my delight when we walked into her room to find not a trace of mould.
Thanks to all on this website who have written about Borax and how it kills fungus.
I hope this helps others in the same situation.
By the way, I live in the UK and it is impossible to buy Borax in any shop (even Boots). They are now selling something called 'Borax substitute' and no-one will give me a straight answer as to why they won't sell Borax. One assistant in Boots said that it was because old people used to put it in their eyes. Anyway, I eventually ordered a tiny amount from Amazon and to be honest you don't need a huge amount. Though one chemical company said they would sell it to my by the ton at a very good price.