Thank you Master Cecil Lee, Thank you for your advise. After reading your reply. I think I will maintain the traditional wooden door. My house is a landed terrace house facing north and the door is on the right side of the house (standing inside the house looking out). The main reason I wanted to change the door is because the existing door size is rather small. (3.5 ft wide x 6.75 ft tall). I think that it is not big enough for a house. That's why I want to make it bigger by extending the current sliding door (which is just beside the door) all the way to where the door is. Thus, only 1 piece of glass sliding door without the actual wooden door. Is there any auspicious feng shui measurement for main door? My current width of the house is 20 ft wide and height is 10 ft. and existing door width is 3.5ft x 6.75 ft tall. Kindly advise. Thanks.