Patching up

There's been this odd mouldy smell in the basement of the community centre and I've found out what it is. Outside the centre on the pavement are these weird glass squares, which actually are supposed to give a bit of light into the basement, they are above a void outside the windows of the basement. Now a few of these glass squares were broken, and it seems when it rains it goes into this void, makes the walls damp and gives the mouldy smell. Decided to do a patch up job on them today. Bought some mortar and pva glue for added waterproofing and flexibility. Mixed it up and layered it over the remnants of glass in layers until the void was filled - jobs a good un.