Ridge Vents

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.
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Welding Fumes

Welding inside of a shop or garage can create fumes. But they can easily be removed from the area by using industrial-type fans, or you can make your own from a recycled forced-air furnace fan. Check with the installers in your area for used fans; the cost may not be more than about $25, or they might even give you one. Cover the intake and all moving parts with heavy metal mesh, and run the power cord through a switch for easy on-off control.
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Workshop Ventilation

Make sure that you have an adequate way to remove dust and fumes from your workshop. If your workshop has two windows that face each other, open one and put a fan that blows outward in the other. If not, an exhaust fan should be installed.
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