Xcluder rodent proofing: Common Mistakes to Avoid

Xcluder's stainless steel fiber content makes it significantly harder to chew through than steel wool or foam. However, it is not impenetrable when used alone on a gap with active rodent pressure. A motivated roof rat (Rattus rattus) working at a known entry point will find the path of least resistance. That is why Xcluder is always paired with a rigid hardware cloth cap fastened into solid substrate - the combination is what holds, not either material on its own. The CDC recommends layered exclusion approaches for this reason.

For most Los Angeles applications, yes. Standard steel wool rusts quickly in coastal air and wherever it contacts moisture - within one to two seasons it degrades enough that rodents push through with minimal effort. Xcluder's stainless steel content resists corrosion far longer. That said, both materials share the same fundamental limitation: they need a rigid overlay to be a durable exclusion element, not a temporary patch.

The most likely explanation is either a gap you did not find or a gap where the Xcluder was not packed fully and capped. Roof rats travel the roofline at night and probe every linear foot of the structure perimeter. A plumbing vent stack on the rear slope, a gap behind a fascia board, or a roof-to-wall junction not visible from the ground are the entry points most frequently missed in DIY exclusion work. Re-entry after exclusion attempts is a sign to do a complete documented inspection - not to add more traps. See also our page on signs you need rodent exclusion versus extermination for what active re-entry actually indicates.

Four things to check: the Xcluder is packed flush to the exterior surface with no visible voids; a rigid hardware cloth cap is screwed over every packed location into solid substrate; there are no contact gaps between the cap and the surrounding surface; and you have before-and-after photos of every sealed location. If the prior work produced no documentation, you cannot verify it was complete or that all entry points were identified in the first place.