A wall build up, also known as a built-up wall, is a construction method where a wall is formed by combining multiple distinct layers or components.
Understanding Wall Build Ups
At its core, a wall build up involves constructing a wall using a sequence of different materials and elements assembled together. This approach allows each layer to serve a specific function, contributing to the overall performance of the wall assembly.
Based on the reference provided, built-up walls are essentially layered construction. This layering is not always monolithic; it often incorporates components and materials from a number of different suppliers and manufacturers. Furthermore, these layers are typically installed in a series of independent operations by different contractors, each specializing in their part of the wall system.
Key Characteristics of Built-Up Walls
- Layered Construction: Composed of multiple distinct strata.
- Diverse Components: Uses materials and elements designed for various purposes (structure, insulation, weather protection, aesthetics).
- Multiple Suppliers/Manufacturers: Components often originate from different sources.
- Independent Installation: Different parts are installed sequentially by various specialized contractors.
Why Use a Built-Up Wall?
Using a layered approach allows designers and builders to optimize each function of the wall. Instead of one material trying to do everything, different materials are selected for their specific properties, such as:
- Structural Support: Providing the framework and load-bearing capacity.
- Insulation: Controlling thermal transfer (heat and cold).
- Weather Resistance: Protecting against rain, wind, and moisture.
- Air Barrier: Preventing uncontrolled air leakage.
- Vapor Control: Managing moisture movement through the wall.
- Aesthetics: Providing the desired interior and exterior finish.
This compartmentalization of function is a key advantage of the build-up method, enabling high-performance walls tailored to specific climate and building requirements.
Common Wall Build Up Layers
While configurations vary greatly depending on climate, building type, and materials, a typical exterior wall build up might include layers like these (from outside to inside):
| Layer | Primary Function(s) |
|---|---|
| Exterior Cladding | Weather protection, Aesthetics |
| Drainage/Ventilation | Allow water escape, Promote drying |
| Weather Barrier (WRB) | Water & air control |
| Insulation | Thermal control |
| Structure (Sheathing) | Shear strength, Base for WRB |
| Structure (Framing) | Load bearing, Cavity for insulation |
| Vapor Barrier (if needed) | Control vapor movement |
| Interior Finish | Aesthetics, Fire resistance, Air barrier |
Understanding a wall build up is crucial in construction as it dictates material selection, installation sequence, and the overall performance of the building envelope.
