HAAG Certified Reviewer

Which material is not typically used for the construction of exterior doors?

1. Wood

2. Fiberglass

3. Concrete

4. Steel

The correct answer is: Concrete

Concrete is not typically used for the construction of exterior doors primarily because of its weight and structural properties. While concrete is a durable material that can be used in building construction, it does not lend itself well to the functionality required for doors, which need to be movable, lightweight, and offer insulation and aesthetic appeal. Exterior doors are commonly made from materials like wood, fiberglass, and steel due to their suitable balance of strength, durability, and resistance to the elements. Wood offers warmth and aesthetic variety, fiberglass is known for its insulation properties and resistance to warping, and steel provides enhanced security and strength. In contrast, concrete does not provide the same practical characteristics that are essential for doors, especially in residential or commercial applications.