Most experts in the real estate industry suggest that curb appeal accounts for a lot of decision-making when purchasing a new home. The roof is an essential factor in curb appeal. When a house comes under contract, it gives the prospective buyer a chance to negotiate a far lower price because of an aged or damaged roof. It's almost always beneficial to replace a worn roof before placing it on the market. Studies show that you will receive most, if not all of your investment, in a new roof within three years of installation.