Hi,
Got up bright and early this morning to find some fur/fluff on the surface of some plastering that was done earlier in the week for a hole in the wall fire. I've no idea what it is (hopefully not mould!), and would welcome any advice as I've never seen this on any other plastering.
There was already a large opening for an existing fireplace, so that was bricked up where necessary and the brickwork plastered. The plaster on the new brickwork has lightened in colour as it should and seems fine. Some of the existing brickwork around the hole was also exposed and needed to be filled, and it's the plaster onto the existing brickwork that hasn't lightened in colour in the same way and that now has the white fluff. The depth from wall surface to existing brickwork was a good 10 to 20 mm at least, and I'm not sure whether the fitter used plasterboard to pack out the bulk of this depth before plastering or whether it's filled totally with plaster. I suspect the latter, and given the depth, I could imagine that this may not have dried yet hence not going light in colour.
Any ideas on what the fluff is are most welcome, and also whether anything needs to be done about it other than getting it off somehow.
Cheers Nick