Image Mold on the sheathing in this attic occurred after attic ventilation was increased Publication Date Sun, 01/01/2012 - 12:00
Image Balanced ventilation strategy for conditioned attic spaces Publication Date Wed, 01/01/2020 - 12:00
Image This HRV, installed in a conditioned attic, provides balanced ventilation to the whole home Publication Date Sat, 02/01/2014 - 12:00
Image This finished retrofit installation of radiant barrier in attic shows the air spaces at the soffit and ridge to promote attic ventilation Publication Date Wed, 06/01/2005 - 12:00
Image Clean the attic floor of debris prior to installing new attic insulation. Use baffles to provide a path for ventilation air entering the attic from the soffit vents Publication Date Mon, 02/01/2010 - 12:00
Image Attic ventilation fans exhaust hot air from the attic while replacing it with cooler air from the outside through intake vents Publication Date Sun, 01/01/2012 - 12:00
Image Attic ventilation can reduce the likelihood of ice dam formation by cooling the roof deck. Publication Date Tue, 01/01/2013 - 12:00
Image Right - Baffles are installed in attic to keep blown insulation from blocking soffit vents and ventilation path
Image Ventilation air comes directly from outdoors, not from adjacent dwelling units, garages, crawlspaces, or attics
Image The ventilation space in this vented over-roof keeps the roof cool to prevent ice dams over the unvented attic Publication Date Tue, 09/01/2020 - 12:00
Image Supply-only ventilation with a fresh air intake ducted to the return side of a horizontal air handler unit located in the attic
Image Baffles allow ventilation under roof decking while keeping wind from blowing insulation back from the edges of an attic. Publication Date Thu, 09/01/2011 - 12:00
Image Right – The HVAC unit installed in the insulated attic uses a heat pump to provide heating and cooling while also providing dehumidification and fresh air ventilation. Publication Date Thu, 09/30/2021 - 12:00
Image A simple vented attic with good air-sealing of the drywall ceiling air barrier, air flow from soffit vents to ridge vents protected by ventilation baffles, and lots of insulation covering the attic floor is unlikely to encourage ice dams. Publication Date Wed, 08/15/2012 - 12:00
Image Closed-cell spray foam covers the heat recovery ventilator ducts and also seals all top plates and seams in the ceiling drywall of the vented attic.
Image Right – Open-cell spray foam is installed over closed-cell spray foam in this hybrid approach to achieve adequate attic ventilation while allowing some vapor permeability. Publication Date Mon, 09/30/2019 - 12:00
Image Right - The energy recovery ventilator ducts supply filtered outside air to multiple locations in the home and continuously exhaust stale air to provide clean, balanced ventilation.
Image Seal all drywall-to-top plate seams and penetrations at the attic floor Publication Date Mon, 02/01/2010 - 12:00
Image Air seal the attic access panel with weather stripping Publication Date Mon, 04/12/2010 - 12:00
Image Right – Spray foam fills the roof joist cavities of this vaulted, unvented attic. Publication Date Thu, 09/30/2021 - 12:00
Image Air seal and insulate drawer and closet boxes in attic kneewalls Publication Date Mon, 04/12/2010 - 12:00
Image Vent the kitchen fan exhaust directly to the outside, not into an attic, crawlspace, or space between floors Publication Date Tue, 02/01/2011 - 12:00
Image Air seal the attic access pull-down stairs opening with weather stripping Publication Date Mon, 04/12/2010 - 12:00
Image Whole-house fans draw outside air through windows into the home and exhaust it into a vented attic Publication Date Sun, 04/01/2012 - 12:00
Image This solar powered attic fan runs when the sun is shining and does not draw any power from the home’s electrical system Publication Date Sat, 01/01/2022 - 12:00
Image Baffles provide an air space over the insulation to guide ventilation air from the soffit vents up along the underside of the roof deck Publication Date Thu, 06/28/2012 - 12:00
Image The spray foam-insulated attic provides a temperate place for the ERV ducts, which provide filtered fresh air to every room in the house.
Image Batt insulation is installed in two layers in perpendicular directions against the baffle to full required insulation height Publication Date Thu, 09/10/2015 - 12:00
Image Batt insulation is installed in two layers with offset seams against the baffle to full code-required insulation height Publication Date Thu, 09/10/2015 - 12:00
Image Seal the drywall to top-plate seams and the lower edge of baffles to the top plate to prevent the air coming from soffit vents from flowing under baffles into insulation. Publication Date Mon, 02/01/2010 - 12:00
Image Wrong - Exhaust fans should not have tight bends in duct work, especially right next to the fan as this can block airflow Publication Date Sat, 02/01/2014 - 12:00
Image Attach a strong permanent cover to gable end vents before a severe storm strikes to prevent moisture intrusion. Publication Date Wed, 01/01/2020 - 12:00
Image The polyethylene ceiling vapor barrier is sealed to form an air barrier around the exhaust fan in this very cold climate location (≥ CZ 6). Publication Date Mon, 10/30/2006 - 12:00
Image Wrong – The open overhang with exposed timbers and unscreened vent holes make this roof more susceptible to ignition. Publication Date Mon, 09/01/2008 - 12:00
