Lots of folks put in words they don’t need. I think they like to see that they have written a lot. Be careful not to encumber your reader with unnecessary verbiage.
“This added insulation value raises the overall system value to an impressive R-20.” Take a look at that first instance of “value.” It’s wrong. The insulation itself raises the value of the system. Get rid of that extra “value.” It decreases the value of the writing.