If these lengths usually are not equivalent, your window opening is just not square or rectangular. In this scenario, it is best to Enable the maker of the new windows or shutters are aware that the opening is "racked" and provide them with these measurements.[nine] X Research supply Affiliate Disclaimer: https://claytontvwvx.blogrenanda.com/23043722/new-step-by-step-map-for-bay-window-glass-replacement