Dead trees are dangerous for several reasons. They are structurally compromised and prone to branch or trunk failure, which can pose a significant safety risk to people, vehicles, and nearby structures. Dead trees can also harbor pests like termites, which may spread to other trees or your home. If a tree died from a disease, it could spread the illness to healthy trees. Additionally, the dry wood is highly flammable, increasing fire risk.

You can find pruning paints and sealants for trees, but you shouldn’t use them on a topped tree. Coatings like these often inhibit the tree’s healing process. An important exception is if there are dangerous fungi nearby that the tree is particularly vulnerable to, like oaks and oak wilt. Sealing cuts can help prevent fungi from taking root.

State and local laws vary, but in most cases, you are allowed to trim any branches from your neighbor's tree that cross your property line. However, it's important to ensure you do not damage the overall health of the tree in the process. Removing branches incorrectly can jeopardize the health of the tree and could lead to you being on the hook to replace it.

There are several signs that may indicate a tree needs to be cut down. These include visible damage to the trunk or branches, a hollow trunk, extensive storm damage, or a significant lean to one side. Other warning signs are pest infestations or the tree growing too close to a house, power lines, or other structures. It is best to hire a professional arborist to inspect the tree, as they can determine if it can be saved or if removal is necessary.