WE built a house on Emerld Island. We installed SIMONTON WINDOWS. The windows are now what they say is (CHALKING). Beloweach window there are white lines running down the bottom of all the windows. They say this is not a manufacturing defect but is part of the vinyl weathering process. I have drove all over the island,I have not seen (CHALKING) on any other house. Would not recommend SIMONTON WINDOWS unless you want white lines running down the side of YOUR HOME.