Thermal Expansion in Brick Slips, Causes, Effects, and Control
Understanding Thermal Expansion in Brick Slips
Thermal expansion in brick slips refers to the natural movement that occurs when materials expand and contract in response to temperature changes. Brick slips, adhesives, backing boards, and the supporting structure all respond to heat and cold, causing small but important dimensional changes.
Although brick slips are thin and lightweight, thermal movement can still affect the overall system if not properly managed.
Purpose of Allowing for Thermal Expansion
The purpose of allowing for thermal expansion is to prevent stress from building up within a brick slip installation. Without suitable allowances, temperature changes can cause cracking, debonding, or distortion of the finished surface.
Key reasons thermal expansion must be considered include:
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Brick slips expanding in warm conditions and contracting in cold conditions.
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Differential movement between brick slips and the substrate.
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Increased temperature variation on external walls.
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Long term performance and durability of the installation.
Managing thermal expansion is essential for preventing avoidable failures.
Thermal Expansion in Traditional Brickwork
In traditional brick construction, thermal expansion is managed using movement joints placed at regular intervals. These joints allow brickwork to move without cracking and are a standard part of modern building design.
The same principles apply to brick slip systems, even though the construction method differs.
Thermal Expansion with Brick Slip Systems
In brick slip installations, thermal expansion is managed through the use of expansion gaps, movement joints, and flexible sealants. These features allow the system to move without transferring stress to the brick slips or pointing mortar.
Correct spacing and placement of these allowances is particularly important on large wall areas and external facades exposed to direct sunlight.
Thermal Expansion Brick Slips and Slips from Stock
At Slips from Stock, our brick slips are designed to be installed as part of systems that account for thermal movement. Incorporating expansion gaps and movement joints where required helps ensure reliable long term performance.
Thermal expansion in brick slips is a natural and predictable process. When properly planned for, it does not compromise appearance or durability. Allowing for movement is a key part of creating a brick slip installation that performs well throughout changing seasons.