How can I check to see if when a replacment vinyl windows was installed, the window frame was actually insulated fully? A few years ago, I had vinyl replacement windows installed in an 100 year old house. I still seem to have draft issues around the windows and I'm thinking that the gaps where the old window weights were, weren't insulated or at least not fully insulated. Is there a way to see if there is any insulation in the window frames, or fill any possible gaps in the wood window frames that now have vinyl replacement windows already in them? Thank you.