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May 16, 2024

External Rendering

by Geoff Flavell in Damp Proofing Blogs

External Rendering:

When considering the impacts of environmental exposure on building exteriors, it is essential to understand the challenges associated with moisture penetration, particularly for structures with solid brickwork. Unlike cavity walls, solid brick constructions lack an intermediate space that can help to intercept and channel away moisture, leaving them more susceptible to water-related damages. Buildings that have southwest-facing walls are particularly at risk. These walls often face the force of driving rains, increasing the likelihood of moisture seeping through any existing cracks in the exterior render. When water makes its way into these cracks, it can infiltrate the brickwork itself, permeating the porous material of the bricks and mortar.

The continuous absorption of moisture can weaken the structure’s integrity and accelerate its deterioration, especially in climates that experience freeze-thaw cycles. In such conditions, the water trapped within the bricks freezes and expands, causing further damage to the masonry. This situation highlights the important need for diligent maintenance of the building’s exterior render and the application of appropriate waterproofing treatments. These preventative measures are vital for protecting solid brick constructions from the adverse effects of water penetration. Ensuring that the render remains intact and implementing strategic waterproofing solutions can significantly mitigate the risk of moisture damage.

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