Double-hung windows are the most popular type of residential window. They feature two sashes that slide up and down independently (in other words, both the top and bottom pane can open).

The Siteline (C) clad wood double-hung sash kit from Jeld-Wen pack includes a lower and upper sash, finishing jamb liners and all other pieces needed to replace a window using the existing frame.

To find out which windows can keep out rain and wind without leaking, Consumer Reports tested 21 double-hung and four casement windows, two popular styles. Here are the best windows for every climate.