The use of ridge vent has increased greatly during the past ten years and when used with a soffit vent or vented drip edge, it is a very effective means of venting rafter bays, especially in cathedral ceiling areas. An air space in the rafter bay must be provided for full airflow. There are various styrofoam vent channels that, installed in the rafter bay, keep the insulation from fully filling the bay, to allow for air space. This can help keep condensation from forming on exposed roof nail ends and dripping onto the ceiling materials below during winter months.
If interest rates drop significantly, you may want to investigate refinancing. Most experts agree that if you plan to be in your house for at least 18 months and you can get a rate 2% less than your current one, refinancing is smart. Refinancing may, however, involve paying many of the same fees paid at the original closing, plus origination and application fees.