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To install a 50-foot long ridge vent, a roofing contractor will charge $409, which includes the labor and material. If you're a handy homeowner who has experience working on roofing projects, you can buy the ridge vent material for $125 and install it yourself, saving 69 percent, a nice reward for your work.
1 Vented gas logs (chimney required): The cost of vented gas logs varies depending on the size of your fireplace and the style of gas logs you choose. 2  Vented gas logs start at about $115 per set, and designer vented gas logs can cost $400 or more. This does not include the cost of any gas-line work needed. 2  Installation costs for a top-vented gas fireplace: Approximately $300 to $1,200. 3  Direct vent gas fireplace installations: These are more expensive and can cost up to $5,000.