Unless you ft it flush to the facia anything you mount to the sill should 'float' otherwise you're going to end up with water trapped between the fins and the sill.
I wonder if there would be any acoustic benefit to filling the existing sill with expanding foam?
re musical window sill
Unless you ft it flush to the facia anything you mount to the sill should 'float' otherwise you're going to end up with water trapped between the fins and the sill.
I wonder if there would be any acoustic benefit to filling the existing sill with expanding foam?