We suggest Simonton Vinyl Replacement windows to all our customers. They are very energy efficient and work flawlessly. I will show a customer a lot of the times how I can open the window with ease with my pinky finger. It's hard to say how much you will save on your energy bill. There are a lot of factors involved. If you currently have a well insulated home and low energy bill you probably won't save that much. If your home isn't that well insulated and large energy bills it will show up more there. I use the example of my grandfather alot. He replaced his windows with Simonton about 10-15 years ago. They have a small 3 bedroom ranch and were having utility bills of $3-400 a month. They replaced the windows and the bill came down to $100 a month. If you are having a hard time keeping your rooms cool in the summer and warm in the winter, you will see a drastic difference in your comfort level along with the power bill. Another reason we offer Simonton is the affordability. We typically install a 5050 replacement window turnkey around $400 per window. Of course there are reasons this can go up, but typical install is on average this price. I would suggest going to simonton.com and searching for an experienced installer in your area. Hope this helps! Good luck with your search. 

Hey Michael,

Here's a quick guide to show your the pros and cons of having asphalt roof shingles applied over your existing roof: