Does the company work with existing windows, e.g. to replace sashes or upgrade the glass? Or, is it only whole window replacement? I have a 2-year-old house with would simply like to improve the noise buffering.

World of windows did our hine last year and they are awesome, they keep the heat and air in and no drafts and the also look nice from the outside and a very reasonable price. And an awesome warranty.

I'm not sure, please call them. Awesome company.

It's the whole window replacement. I live on a very busy road with buses and fast & furious wannabes and I use soundproofing inserts from indowindows in Portland Oregon to help with my living room

Mr. Saunders, thank you for your inquiry. We do not do repairs on existing windows or sash/glass replacements, only full window replacements. We offer several window options that will help with noise, our 4000 window has dual pane, with double strength glass which will be a huge improvement over the new construction windows you have now. We also offer triple pane and laminate glass. Please give us a call if you want to get a quote on the any if these options. Have a great day!