I have a single wooden garage door in my garage that is falling apart and would like to replace it for a new single steel garage door (with no motor). When I went to look for the same size garage door that I currently have I could not find it and had to buy one from Home Depot that is 7 inches smaller than the one I currently have.

The problem that I have now is that the garage door opening is about 7 inches more in height only (width is the same). Any ideas how I can do this myself?

Thanks!

I have a single wooden garage door in my garage that is falling apart and would like to replace it for a new single steel garage door (with no motor). When I went to look for the same size garage door that I currently have I could not find it and had to buy one from Home Depot that is 7 inches smaller than the one I currently have.

The problem that I have now is that the garage door opening is about 7 inches more in height only (width is the same). Any ideas how I can do this myself?

Thanks!
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Thanks a lot for your answer. What materials and how should I do this?