What Is Underlayment Material?
Underlayment material is a foundational element for creating smooth surfaces in a building’s walls, ceilings, floors, etc., and is crucial for attaching finishing materials. It is typically made from building materials like wood or steel. Underlayment is essential for ensuring strength, levelness, and smoothness of the base before installing finishes such as wall and ceiling materials.
Uses of Underlayment Material
Underlayment is used in various locations, including exterior and interior walls, ceilings, and floors.
1. Underlayment Materials for Exterior Walls
These materials serve as the base for smoothing exterior wall surfaces and installing finishes like paint and tiles. Options include plywood, plywood for siding, and cement board.
2. Interior Underlayment Materials
Interior underlayment is used for smoothing surfaces of interior walls, ceilings, and floors, and for attaching finishes like cloth and paint. Options include board underlayment, plywood, and metal frames.
3. Floor Underlayment
This material is the base for floors, providing a smooth surface for flooring, tatami mats, etc. Options include plywood and laminated wood.
Characteristics of Underlayment Materials
Advantages of Underlayment Materials
1. Excellent Durability
As structural components, they are strong and durable, particularly for exterior walls and floors, which must withstand elements and load.
2. Beautiful Finish
Choosing the right underlayment enhances the finish’s appearance, with a smooth and level base material improving the end product.
Disadvantages of Underlayment Materials
1. Handling Challenges
They are sensitive to moisture and humidity, requiring care during installation and storage.
2. Impact on Finished Quality
The choice and installation method can affect the finished quality. Professional installation is advisable.
3. Importance of Levelness and Smoothness
These qualities are crucial as they are the foundation for finishing materials.
4. Moisture and Fire Resistance
These properties may be required, such as moisture-proof materials for exterior walls and fireproof materials for interiors.
Types of Underlayment Materials
1. Wood
Commonly used woods include softwoods and hardwoods like cedar and cypress, particularly for interiors.
2. Steel Frame
Steel frames offer superior strength and durability, often used for exterior walls and floors.
3. Concrete
Concrete is strong and durable, commonly used for floors and foundations.
4. Plywood
Plywood is strong and durable, frequently used for interior walls and ceilings.
How to Select Underlayment Materials
1. Uses
Select materials based on the location of use, like moisture-proof for exterior walls.
2. Strength and Durability
Choose materials with sufficient strength and durability, considering wind, rain, and load resistance.
3. Construction Method
Select materials suitable for the construction method.
4. Cost
Consider the budget and choose materials that fit within it.