Vented Or Non Vented Roof

Because the sheathing is kept cooler roofing materials tend to have a longer life span.

Vented or non vented roof.

The increase in the use of complex roof shapes and cathedral ceilings has resulted in problems with vented roofs. The use of vented soffits along with non vented soffits helps prevent ice dams from forming along your roofline. Vented roofs provide the capacity for moisture to be removed from the underside of roof sheathing via convection currents in the vent cavity. So convection currents need to be carefully designed.

They can help you determine the needs of your roof and environment and make a recommendation. A properly insulated ventilated roof can help to control or prevent the formation of ice dams. The air enters the space and with the aid of attic baffles a tubular object attached directly to the underside of the roof decking but above the insulation air is free to enter and flow upwards. However they work best with airtight ceiling attic interfaces and where ductwork and air handlers are not located within attic spaces.

In a vented roof foam can seal the openings and serve as an air barrier and a vapor retarder in addition to its insulating function. Because today we as an industry are insulating below the vented cavity as standard practice the building itself is no longer heating the cavity. Non vented roofs provide conditioned spaces for duct work ac ventilation units. Should you vent a metal roof.

Metal roofing works well with this because the metal is unaffected by heat not being able to pass through it and enter the attic. It also helps prevents mildew mold and fungus from infiltrating the home due to excessive moisture build up. Preventing moisture is essential for having a properly functioning un vented roof. These roofs keep your home cooler during the hot summer months.

Ventilated roofs remove moisture from roof cavities structural members sheathing and insulation. Vented attic roof designs have the advantage of a long proven historical track record. Unvented attic roof designs have the advantage of providing conditioned spaces for ductwork and air handlers. Non vented won t pull in burning embers like a vented roof will.

The other option of course is a vented attic which requires an equal balance of intake and exhaust vents. In many cases for existing homes this is the easier way to go. If you re unsure about whether or not to vent your metal roof talk to a product specialist. Keep in mind the ratio of vented to non vented panels will differ depending on your home and your installer s techniques.