Umbrella & Excess Liability Insurance for Tower Contractors
A single fatality on a tower site can generate claims exceeding $5M. Multi-fatality incidents can reach $20M+. Umbrella and excess liability policies provide the additional limits that stand between a covered claim and the financial destruction of your company.
Umbrella vs. excess — what is the difference
An umbrella policy sits above your primary GL, commercial auto, and employers liability and provides both additional limits and broader coverage. It can drop down to cover claims that the underlying policies exclude (subject to a self-insured retention). An excess policy simply adds limits on top of the underlying policies without broadening coverage. For tower contractors, a true umbrella is preferred because it can fill gaps in underlying coverage, but availability is limited in the tower market. Most policies placed for tower contractors are excess-following-form, meaning they mirror the underlying terms without adding breadth.
How limits are structured
Umbrella and excess policies for tower contractors are typically structured in $1M-$5M layers. A common structure is $5M umbrella over $1M GL, $1M auto, and $1M employers liability. For contractors needing $10M total limits, a second layer of $5M excess sits above the umbrella. Each layer has its own carrier — the lead umbrella carrier takes the first $5M of exposure above the primary, and the excess carrier takes the next $5M. The lead umbrella position is harder to place and more expensive per million because it sits closest to the loss.
Height exclusions in umbrella policies
The most dangerous coverage gap in tower insurance is a height exclusion in the umbrella that does not exist in the underlying GL. A contractor may have a GL policy that explicitly covers work at height, but if the umbrella contains a height exclusion, the umbrella will not respond once GL limits are exhausted. This creates a false tower of coverage — the certificate shows $6M total limits, but only $1M actually applies to tower work. Every umbrella and excess layer must be reviewed for height exclusions and other restrictions that narrow coverage below the underlying policies.
MSA limit requirements by vendor
Major turf vendors and tower owners require different umbrella limits depending on the work type and contract value. Tier 1 carriers (AT&T, Verizon, T-Mobile) typically require $5M-$10M in umbrella/excess limits. Tower companies (American Tower, SBA Communications, Crown Castle) similarly require $5M minimum. Turf vendors and general contractors may require $5M-$10M depending on the project scope. These requirements are non-negotiable — you cannot bid on work without the required limits in place.
Cost factors and market availability
Umbrella pricing for tower contractors runs $8,000-$25,000 per million depending on the underlying program, loss history, and work types. A $5M umbrella over a clean program might cost $40,000-$75,000 annually. A $10M tower with losses might cost $150,000+. The market for tower umbrella capacity is limited — fewer than 10 carriers actively write lead umbrella positions for tower contractors. Market capacity tightens after industry-wide catastrophic losses such as multi-fatality tower collapses.
Frequently asked questions
How much umbrella coverage do tower contractors need?
Most tower contractors need $5M-$10M in umbrella/excess limits to satisfy MSA requirements across their client base. The specific requirement depends on the turf vendors and tower owners you work for. Running $5M is the minimum for most national turf vendor MSAs. Contractors working directly for Tier 1 carriers or on large capital projects may need $10M or more.
What is a follow-form excess policy?
A follow-form excess policy mirrors the terms, conditions, and exclusions of the underlying policy it sits above. It adds limits but does not broaden or narrow coverage. For tower contractors, this means if your underlying GL covers work at height without exclusion, the follow-form excess also covers work at height. Conversely, if the underlying has a gap, the excess has the same gap.
Can I get umbrella coverage if I have a high EMR?
An EMR above 1.25 makes umbrella placement significantly harder and more expensive. Some specialist carriers will still write umbrella coverage for tower contractors with elevated EMRs, but they will increase the premium, reduce limits offered, or both. An EMR above 1.5 may make umbrella coverage unavailable in the standard market entirely, requiring surplus lines placement.
Does my umbrella need to list each additional insured separately?
Most umbrella policies follow the underlying GL for additional insured status, meaning anyone who qualifies as an additional insured under your GL is automatically an additional insured under the umbrella. However, some carriers require a blanket additional insured endorsement on the umbrella specifically. Check your umbrella policy and verify with your broker that the additional insured provisions match what your MSAs require.
Coverage by work type
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