Please post some pictures of the dormer outside and inside so the roofers can give you better advice as to what possibly is going on. Thanks.
Hard to say without pictures, could be roofing, flashing, caulking, etc., something failed somewhere. Please wait for the roofers to respond. Thanks.
Hard to say without pictures, could be roofing, flashing, caulking, etc., something failed somewhere. Please wait for the roofers to respond. Thanks.