on the south terrace elevation replace the existing terrace glazing with two panel hst lift and slide sliding doors exactly as shown in the reference image match the frame design panel proportions and overall appearance of the reference keep the original size and position of each opening on the north elevation front gable facade keep the existing fixed floor to ceiling windows exactly as they are do not change the window layout architecture facade roof materials or proportions of the house the only modification is replacing the south terrace glazing with two panel hst sliding doors identical to the reference image everything else must remain unchanged
