Do you have any data on the window. Looking at the NFRC, the thermal numbers look about average but I don't see any of the architectural data on the site. If you like a full tear out, most good replacement windows can be offered with a full nailing flange and the installation duplicated to what your builder is proposing.

Impervia good window, warranty sucks. to many fine prints. If not mistaken the window is mechanically fasten. Which gives it a not so good air infilteration rating and it has weeping holes. Any window has weeping holes means that water gets in their framing. which means water has to come out those weeping holes. Which means that tempature outside(hot or cold) can blow in your framing and into yor house. Look into a uipvc vinyl window with fiberglass reinforcement,and also are fuse welded on outside and inside(no weeping holes.

Hi Shannon, To get the desired look, for the look you are trying to achieve, I would recommend the following based on our twelve years as a Windsor distributor/installer: 1) Windsor Legend double-hung windows with exterior moulding factory applied. This will give you the set-back look you are desiring and still allows the Hardie planks to "dive in" to the side of the window trim. We completed numerous homes, that were a farmhouse architectural typology, in the South Carolina Low Country as well as Savannah, GA area with the Windsor Legend series . 2) Windsor Next Dimension classic series with nail fin and no brickmould attached. You will still need to have the window recessed so it is set back, then have PVC exterior trim applied so the Hardie plank "dives in" to the window trim. If you are using 2 x 4 exterior walls, the builder will have to fur-out the inside of the window wall so the drywall and interior window trim can be applied appropriately. Hope this helps! Patrick

I did give that a bit of thought, lovemrmewey when I decided to give up the first floor bedroom to add more living space in the kitchen area for today. If need be, I can reconfigure another area of the first floor for a small bedroom if one is required in the future. For now...I am holding a vision that I will be healthy and able to manage stairs to an upstairs bedroom. Both floors will now have bathing/showering options. In the past, that was only on the first floor.