The best replacement windows vary depending on the kind/type of window being replaced.
Be cautious when choosing a replacement
When replacing any window in your home you need to be sure that the replacement will be durable enough and that its construction will aid in longevity. The use of super spacers to prevent leakage of gases between panes will be an important part of ensuring that your windows last. Many companies take a short cut by not using super spacers and substitute them with metal spacers instead. The higher end units tend to utilize super spacers and for good reason. They prevent an otherwise 10% leakage per year that you’ll experience when using metal spacers.
If you are looking to replace wooden windows then Marvin is a great company to work with, as they have a solid reputation and offer high quality windows. Below are a listing of several manufacturers of replacement windows: http://smartwebsiteideas.com/
They have purchased a company called Alpine in Washington and got their hands on a low end, dicount window in the process. They do manufacture other window types so be careful when using them for cheap windows as the quality can be inferior.
They have a good reputation and are very well known for making high quality wood windows. They manufacture the Renewal series of windows which uses a material containing more than 38% reclaimed wood fiber known as Fibrex. They’re a good company if you want to install wood windows, although be forewarned; wood windows are not the best option if you live in climates that receive a lot of rainfall like the Northwest. They require much more maintenance than vinyl windows.
They have certainly left their mark in the replacement window industry and are a large firm with many innovative strategies to be credited for. They manufacture various products and have a long line of options from siding to windows.
These guys, better known as CDI are Washington based and make really high end vinyl windows. Their windows are very appealing and the construction process using multiple chambered methods make for a very strong and sturfy replacement window.
They manufacture custom replacement windows for well known companies like Northwest Home Improvement Company. Their architectural window series has a longstanding reputation for stellar performance and is aesthetically pleasing as well.