What is the primary function of coatings used on construction joints?

The primary function of coatings used on construction joints is to prevent moisture intrusion and allow for structural movement. Coatings are designed to protect the integrity of construction joints, which are critical areas where two different building elements meet and may experience movement due to factors such as settling or thermal expansion. By preventing water ingress, these coatings help mitigate the risk of water damage, mold growth, and deterioration of materials. Additionally, they accommodate structural movement, which is essential for maintaining the function and safety of the structure over time.

While enhancing aesthetic value and providing soundproofing can be benefits of certain coatings, these are not their primary functions concerning construction joints. Similarly, enhancing thermal conductivity is not relevant to the purpose of coatings in this context. The focus remains firmly on moisture prevention and the accommodation of structural movement, ensuring the longevity and effectiveness of the construction joint.