Why are elastomeric coatings preferred for wider construction joints?

Elastomeric coatings are preferred for wider construction joints primarily because they allow for movement and flexibility. This characteristic is crucial in construction, where structural elements may expand, contract, or shift due to temperature changes, settling, or seismic activity. The ability of elastomeric coatings to stretch and compress without losing their integrity ensures that the joints remain sealed and effective over time, even under varying conditions.

In addition to their flexibility, elastomeric coatings also create a resilient barrier that can accommodate different types of movements without cracking or breaking. This is essential in maintaining the performance of joint systems in preventing the passage of smoke, fire, or water through these joints.

While cost, insulation properties, and fire resistance are important considerations in material selection, they do not address the essential requirement in wider construction joints for the capacity to handle dynamic movement, which is where elastomeric coatings excel.