Owens Corning
Add a Power Roof Vent
Add a Power Roof VentAir circulation in the attic is important because on hot days it prevents the space from overheating. When the thermometer drops, proper air flow reduces attic humidity and improves insulation performance.

A contractor will charge $340 to install a 14-inch power ventilator; you can do it for about half and pocket a 56 percent savings. That's assuming you have carpentry experience and don't have a steeply pitched roof. If the idea of working on the roof and cutting a hole in it is too intimidating, don't hesitate to hire out the job.

For about $150 you can buy what you need: a power ventilator, an electrical box and cover, a short piece of three-wire BX or Romex cable, a package of wire nuts and a quart of roofing cement. An electrical circuit is needed to power the fan. If there isn't one already in the attic, call an electrician.

You'll need basic carpentry tools, and for cutting the roof opening rent a reciprocating saw. Pro vs DIY Cost and TimeWhile you're working on the roof, you'll need someone inside the attic to help you.

Tip: Check the manufacturer's recommendations for the amount of intake vents required for the fan to run efficiently. You might have to install additional vents in the eaves or gable ends.

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