I had a dark mark around my doorframe which seems to have got bigger I dont know if its damp , it doesn't feel damp and the sealant on the outside looks good. photo's attached any idea what it is.
Thanks
I agree with KenGMac here, looks like a filler of some sort, either a caulk or maybe they've tried to apply a thin bead of plaster to finish the gap off and not use trims
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