This is a problem that occurs in the spring time when temps start to rise here in Minnesota. This brown almost coffee like stuff drips on the outside of our house ( built in 1999) vinyl siding and it does come in around one of the windows and ends up on the blind. I need some direction on where to look first.
08:38AM | 02/21/16
I have read that you have too much air getting into attic. The condensation freezes and when it melts, taking debris with it, runs down the siding..