Poor Energy Efficiency - Usually multi-slide doors are such large openings that they need to be made of aluminum to be able to manufacture such large openings. As you probably know aluminum isn′t very energy efficient. Also having such large sections of your home being glass will also require more energy to heat and cool as opposed to if there was just wall space there. However luckily glass is getting more energy efficient all the time and there are several low-e glasses available that perform surprisingly well.
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