Our liquid floor screed is drying off: all windows and doors open all day - this weather is helping a lot I'm sure.
Someone on BH suggested we put a sheet of plastic on the floor to see if there was any evaporation: a quick , dirty check. So I have done.
When I remove the plastic sheet, the area covered by it is significantly lighter in colour than the area which has not been covered.
Why would that be so? Instinct says the opposite might be the case (because there will have been less transpiration / evaporation).
Anyone know why , first thing in the morning the screed is a lighter colour under the sheet than everywhere else?