Wood used in houses is hard.

Wood is a widely used material in the construction industry, especially in house construction. It possesses several desirable qualities that make it an ideal choice for building structures. One of the primary characteristics of wood used in houses is its hardness.

Properties of hard wood:
1. Density: Hardwood is denser than softwood, which means it has a higher mass per unit volume. This density contributes to its hardness and durability.
2. Strength: Hardwood is stronger than softwood. It can withstand more pressure and weight without breaking or deforming.
3. Resistance to wear and tear: Due to its hardness, hardwood is resistant to wear and tear. It can withstand repeated use and heavy foot traffic without significant damage.
4. Durability: Hardwood is known for its long-lasting nature. It can withstand various environmental factors such as moisture, temperature changes, and pests, making it suitable for use in houses.
5. Appearance: Hardwood often has an attractive and appealing appearance. It comes in a variety of colors and grain patterns, enhancing the aesthetic appeal of houses.

Uses of hard wood in houses:
1. Structural elements: Hardwood is commonly used for structural elements such as beams, columns, and joists. These components provide support and stability to the house.
2. Flooring: Hardwood flooring is a popular choice due to its durability and aesthetic appeal. It adds warmth and elegance to the interior of a house.
3. Doors and windows: Hardwood is often used to make doors and window frames. It provides strength and security to the house while also enhancing its visual appeal.
4. Cabinetry and furniture: Hardwood is commonly used for making cabinets, shelves, and furniture pieces in houses. Its hardness ensures the longevity and sturdiness of these items.

In conclusion, the wood used in houses is hard because of its desirable properties such as density, strength, resistance to wear and tear, durability, and attractive appearance. These qualities make hardwood an excellent choice for various applications in house construction.