Living in a condo means that you will have to abide by certain rules. You already knew this going in, though, since your HOA probably gave you an entire packet of bylaws involving noise complaints and other goodies. What most people don't realize is that this is doubly true if you have a mortgage on the condo that you now own. This is because you don't just have the HOA to deal with; it's also a matter of dealing with your lenders and their demands. In many cases, mortgage lenders will ask you to buy something called “walls-in” coverage for your home. But, what is it, and why does this type of insurance matter so much to your home's financial security? Before you write this insurance off as an unnecessary cost, you might want to know what it does and why it's so frequently requested.