Once again, everyone is right. If you believe you can't charge more to go in an attic then you are right. Personally, I consider an attic to be dangerous physically and to my health and extremely uncomfortable to boot. I explain this to clients and charge them a higher rate for the high wire act and they generally agree. If they don't it's their perogative. There are plenty of attics. It is whatever the market will bear and whatever you deem your time to be worth. I have more work than I can handle, raising my prices is the only logical thing to do.