With four buildings on one policy, the question is whether one limit covers them all or each is capped on its own.

A master policy covering several buildings has to say how the property limit is divided among them, and there are two answers. Under a scheduled structure each building appears on the policy with its own limit, and a loss at that building is capped at that number. The limits on the other buildings are not available to it, even when they are untouched. Under a blanket structure a single combined limit applies across all the scheduled locations, and a loss at any one of them can draw on the entire amount.

The reason this matters is not that blanket buys more insurance. In most cases the total limit is similar either way. It matters because the per-building values underneath a schedule are estimates, and estimates are wrong in both directions. Scheduled limits make the association live with each error individually. A blanket limit pools them, so an understatement on one building is absorbed by the combined figure rather than becoming the ceiling on that building's claim.

Where the schedule breaks: the values were never equally accurate

Consider a four-building association carrying 12,000,000 dollars of property limit. Scheduled, that might sit as 3,000,000 dollars per building on the assumption the buildings are alike. They rarely are. One has a different footprint, one was re-roofed and re-clad after a hail claim, one sits on a slope with a structured foundation the others do not have. If the true rebuilding cost of that third building is 4,200,000 dollars, a total loss there is settled at its scheduled 3,000,000 dollars while 9,000,000 dollars of limit sits unused on buildings that were not damaged. The association is short 1,200,000 dollars on a policy that was never close to exhausted.

Written blanket, the same 12,000,000 dollars is available wherever the loss occurs, and the 4,200,000 dollar rebuild is paid in full. Nothing about the premium or the total limit changed. What changed is whether the association's own estimating error was allowed to become a cap. That is the entire practical case for a blanket limit, and it gets stronger the more buildings an association owns and the more they differ from one another.

The same logic explains why blanket structures are common on associations that have grown in phases. A community built out over a decade tends to have buildings whose values were set at different times against different construction costs, and a schedule freezes each of those moments into a separate cap. The board inherits a set of ceilings nobody chose deliberately.

The margin clause, and why blanket does not excuse a stale statement of values

Reading the word blanket on a declarations page is not the end of the enquiry. Many blanket policies attach a margin clause, sometimes issued as an occurrence limit of liability endorsement, which caps recovery for any one loss at a stated percentage of the value reported for the damaged building, commonly 110 to 125 percent. Return to the four-building example. If the third building was reported at 3,000,000 dollars and the policy carries a 115 percent margin clause, recovery on that building is capped at 3,450,000 dollars no matter that the blanket limit is 12,000,000 dollars. The association is better off than it was under a pure schedule, and still 750,000 dollars short of the rebuild.

That is the detail boards most often miss, because it defeats the intuition that a blanket limit makes the per-building numbers unimportant. It does not. Under a margin clause the reported values remain the basis of the calculation; the clause simply allows a stated cushion above them. A statement of values that has been rolled forward unchanged for several renewals is therefore just as dangerous under a blanket policy as under a scheduled one, and the association may believe it has bought its way out of a problem it still has.

Blanket limits also travel with conditions. Carriers generally want a current signed statement of values covering every scheduled building, and they commonly pair the structure with a high coinsurance percentage or an agreed amount endorsement that waives coinsurance for the term. Read the two together: a blanket limit with an agreed amount endorsement and no margin clause is a genuinely different policy from a blanket limit with a 110 percent margin clause and values four years stale, even though both use the same word on the declarations page. When a board reviews the structure, the questions are whether the limit is blanket or scheduled, whether a margin clause is attached and at what percentage, when the statement of values was last refreshed, and whether the coinsurance clause is waived. Those four answers describe how much of the limit is actually reachable.