Can any insurance company cancel your policy because of necessary roof repairs?

Sure. If you do not maintain the property you can expect any insurance company to cancel your policy. Maintenance is not covered by a homeowners insurance policy but lack of proper maintenance is a definite cause for cancellation. They do not want to insure a property that is not kept up. The term insurance companies use is pride of ownership. This shows that the owner cares about and for the property. If the roof already needs replacing the next time a small storms comes also comes a claim for a roof that should have already been replaced.