In this case the defendant issued a policy to plaintiffs to the amount of $5,000 upon their stock of lumber upon their docks at Au Sable, in Iosco county.
On the sixteenth of May, 1885, there was a loss by fire to the amount of $6,328. The total value of the lumber on hand was $37,148.23. Other policies were in existence to the amount of $14,000, which iff is admitted were to be considered in dividing up the loss among the insurers. But it was claimed and admitted that the plaintiffs themselves were bound to carry a further amount of insurance which should also contribute, and the only question presented by the record is how much they should contribute. It depends upon a written clause in defendant’s policy, which ran as follows:
“It is a part of the consideration of this policy, and the basis upon which the rate of premium is fixed, that the assured shall maintain insurance on the property, hereby insured by this policy, to the extent of four-fifths of the actual cash value thereof, and that, failing so to do, the assured shall be a co-insurer to the extent of such deficit, and in that event shall bear his, her, or their proportion of any loss. It is, however, mutually understood and agreed that in case the total insurance shall exceed four-fifths of the actual cash value of the property insured by this policy, the assured shall not recover fr&m this company more than its pro rata share of the whole actual cash value of such property.”
In the present case four-fifths of the value of the lumber was $29,718.56. The combined policies, including defend*335ant’s, amounted to $19,000, leaving a deficit in the sum agreed to be kept insured'of $10,718.56. The defendant insists that it is not concerned whether plaintiffs insured fully in other companies, or carried the insurance themselves. Plaintiffs claim, and the court below held, that defendant, to the extent of $5,000, was bound to bear half of the deficit so as to be a co-insurer with plaintiffs for half the amount not insured elsewhere". This would, in the present case, put the ■defendant practically on the same footing as if it had insured to the amount of $10,359.28, inste$idof $5,000.
The only basis for this argument is the use of the word -“co-insurer,” which it is claimed made defendant and plaintiffs joint or equal insurers to the amount of any deficit which plaintiffs saw fit to leave uninsured. .
This construction appears to us unnatural and unreasonable. It nullifies the whole effect of the plaintiffs’ agreement to keep up insurance to the amount of four-fifths, and enables them, by violating that agreement, to throw one-lialf of the burden of their default on the defendant, which can have no means of protecting itself against plaintiffs’ misconduct. In the present case, if plaintiffs had neglected to procure any additional insurance at all, defendant, on that theory, would have been compelled to stand insurer to the amount of over $17,000, and consequently been bound to pay nearly three-fifths of the entire loss.
It seems to us the meaning of the clause in the policy is very clear, and holds plaintiffs bound either to procure from ethers, or to carry themselves, insurance to the extent, with ■defendant’s policy, of four-fifths of the value of the insured property. The undertaking is positive and unequivocal that they shall keep the property insured to that extent, and that they shall themselves be treated as insurers for all that others ■do not insure. The word “ co-insurers ” means neither more nor less than fellow-insurers, and is used to put plaintiffs on the same footing with other insurers who issue policies and ■contribute ratably in case of loss. It cannot mean that defendant is to be made jointly responsible with plaintiffs for any default which plaintiffs see fit to make.
*336All persons issuing policies on the same property are known as co-insurers, and they are never jointly liable, but their proportion of liability depends on the amount which each insures. The difference between what was actually insured and four-fifths of the value of the property covered was the amount insured by plaintiffs, and for which they became, in the language of the policy, co-insurers. Ang. on Ins. §§ 26, 88. If that word is at all ambiguous, the policy shows plainly what was intended.
The judgment rendered below was excessive, for the reason that it made defendant bear more than its proportion of the loss. The computation acted on below made defendant liable originally, and without interest, for $1,300. The proper sum ivas $1,064.73, and interest on that to the date of the finding below is $24.23, making the proper sum due then $1,088.96. The judgment below was excessive to the amount of $240.61.
The judgment below must be reversed for the excess over $1,088.96, and affirmed as to the balance. Defendant will, recover costs of this Court.
The other Justices concurred.