"Crack" - what is it, definition of the term
«Crack» denotes a narrow, linear fracture in a solid material that forms when applied stress surpasses the internal cohesion of the substance; the break typically initiates at a point of weakness, propagates across the surface or through the depth of the material, and may compromise structural integrity if left unchecked.
Detailed information
Cracks in building materials create micro‑environments that retain moisture and protect small arthropods from external disturbances. The narrow opening limits airflow, raising relative humidity and providing a stable temperature range suitable for the development of ticks, bugs, lice and fleas. Surface imperfections often originate from thermal stress, mechanical load, or material fatigue, resulting in fissures that may extend several millimeters beneath the visible line.
These fissures serve as refuges during the vulnerable stages of life cycles. Egg deposition frequently occurs on the inner walls, where protection from predators and desiccation is maximized. Nymphs and larvae remain within the protected zone until they acquire sufficient mobility to disperse onto hosts. The concealed nature of the gap hinders visual inspection, allowing infestations to persist unnoticed for extended periods.
Effective management requires a systematic approach:
- Identify all visible fissures through thorough visual inspection and, when necessary, use endoscopic tools to assess depth.
- Seal each opening with appropriate materials (e.g., epoxy resin, polyurethane sealant) to eliminate moisture retention.
- Apply residual insecticide to the sealed area, selecting a product with proven efficacy against the target species.
- Monitor the treated zones periodically for signs of re‑infestation, focusing on areas where humidity remains elevated.
Preventive measures include maintaining stable indoor temperature, reducing sources of condensation, and conducting routine structural assessments to detect early formation of new fissures. By addressing these microhabitats, the likelihood of tick, bug, louse and flea colonization diminishes significantly.