Later modifications included doors where both halves can be closed or opened together.

The renovation also included new doors that were not able to be opened from the outside during school hours.

The apartment included a gas fireplace and French doors that opened out onto the balcony.

The device also included separate doors at the back which allowed the user to control the degree and direction of light.

Minor changes included improved automatic doors that closed more quietly.

The building includes an 85-foot ridge pole and front doors that weigh 500 pounds each.

Additional parts of the toy set include windows and doors, which bring a realistic appearance to the final creation.

This included new ceilings, doors, insulation, kitchen floor and carpeting.

The new work will also include doors at the south end of the hall leading to a new terrace outside.

The physical components of the envelope include the foundation, roof, walls, doors and windows.