What is a Ridge Vent on a Roof?

A ridge vent is an opening along the peak (ridge) of a sloped roof which allows warm air to escape the attic, thus improving the energy efficiency of the home. It looks like this:

Installation of a ridge vent typically increases the cost of the project by $200-300.
If you have a lot of sunlight in summer, we suggest that you have a ridge vent installed when replacing your roof.