On our property? Unlikely..... could it be a reaction between rain and the components of sand-lime brick? However, in that case, the damages inside would surprise me.
It is clarified. It is probably efflorescence, as some sand-lime bricks contain metal parts that react with direct and air moisture. This stone is not suitable for outdoor use. Learned something new again.... the craftsman will be told this at the right opportunity!
It's clarified. It is probably efflorescence, as some calcium sandstones contain metal parts that react with direct and air moisture. This stone is not suitable for outdoor use. Learned something new again.... the craftsman will also be told at the right opportunity!
The mystery is solved :)
Invoice already paid? I think there is room for discussion.
Was this planned as exposed masonry?