What is the difference between an umbrella and excess policy for tower work?

While often used interchangeably, umbrella and excess policies have technical differences. An umbrella policy provides broader coverage than the underlying policies: it may cover claims that the underlying policies exclude (drop-down coverage) and typically has a self-insured retention for claims it covers but the underlying does not. A true excess policy provides only additional limits on exactly the same terms as the underlying, with no broader coverage. For tower contractors, the distinction matters in specific scenarios. An umbrella with drop-down coverage might respond to a claim that falls within an underlying policy exclusion (subject to the umbrella's own terms), providing a safety net for gaps. A pure excess policy would not respond if the underlying excludes the claim. In practice, many policies labeled umbrella in the tower space function as excess policies because they follow form without adding broader coverage. When evaluating proposals, look beyond the policy title to the actual coverage form. Key questions: Does it follow form? Does it provide drop-down coverage over any underlying exclusion? Does it have its own exclusion schedule? The answers determine whether you have a true umbrella or a relabeled excess policy.