If you don't want the house, you load up the inspection report/demands that the seller fix with every last item you can think of. They either do them all or the home inspection contingency doesn't lift and you walk.

That said, asking for a new roof just because the life of the current one is only 5 years probably isn't going to fly. So, you ask for one, the seller says "no" and you walk.

If you really WANT the house (and you must have since you overpaid for it) you find some middle ground.

It's at you discretion. You have the option to void the contract within the inspection period without providing further justification. The general inspection contingency isn't designed to facilitate further negotiations but if you think you have overpaid you can always try to open up a negotiation, for eg. by offering to waive the contingency in return for a seller contribution to closing.

Under what circumstances the contract is void in this case.

And your question is....?

We have recently signed a contract in VA with a general inspection clause. With home inspection the roof is old and should be changed in 0-5 years. We are already paying 20 k more than the asking price.