I heard that if you screw roof flashings into and around the bottom of trees, it'll keep iguanas out of them for Floridians. I wonder if this'll work against squirrels and other rodents for the rest of us. Seems legit.
Discussion
Squirrels can jump up pretty high on a tree trunk, it would have to be some tall flashing.
This is true unless you layer it in a way they can't climb. They can also climb up brick so I'm rethinking this. Their gestation period is only about 46 days and they mate all year round. They can often become intrusive and best in attics, chewing wires and ducts. The get in through the facia and soffit, typically out of view from ground level. Homeowners insurance excludes rodent damage. They're a real pain and very smart.
Def can cause lots of damage.
and it only takes 1 exposed trunk for them to have access to the whole network
Mark Rober has been trying to solve this problem for years.