New windows are costlier than replacement windows as in the former case
, old window and its frame needs to be completely taken out and the installation needs to done from scratch in case of setting up a new window. Further, it is more time consuming process as compared to the replacement windows, which can be fixed on the existing panel and matching the stucco colors after patching. Replacement windows are heavier in weight and reduce the glass area and in some cases it may not be identical to the existing window. So ultimately, it should be decided on the convenience and the preference, which type of energy saving window should be installed.