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Flashing at bottom of exterior walls with weep holes included for masonry veneer and weep screed for stucco cladding systems, or equivalent drainage system
Flashing at bottom of exterior walls with weep holes included for masonry veneer and weep screed for stucco cladding systems, or equivalent drainage system
Flashing at bottom of exterior walls with weep holes included for masonry veneer and weep screed for stucco cladding systems, or equivalent drainage system
Flex duct compressed by plumbing pipes
Flex ducts are compressed
Flex ducts may rest on ceiling joists or truss supports
Flexible Duct Materials & Assembly
Flexible ducts in unconditioned space not installed in cavities smaller than outer duct diameter; in conditioned space not installed in cavities smaller than inner duct diameter
Flexible ducts supported at intervals as recommended by mfr. but at a distance ≤ 5 ft
Flexible rubber through-wall flashing
Floor joist cavities can make acceptable duct chases
Floor joist cavities can make acceptable duct chases
Foam gasket installed beneath sill plate
Foam holes for plumbing in the top plate, sill plate, or subfloor
Foam wiring holes in top plate
Foil-faced rigid foam and spray foam can be used to insulate a basement on the interior; use good moisture management techniques to keep the basement dry
Footing drain pipe is located exterior of the footings below the slab and is surrounded by washed stone and filter fabric.
For fireplaces that are not mechanically drafted or direct-vented to outdoors, total net rated exhaust flow of the two largest exhaust fans is .15 CFM per 100 sq. ft. of occupiable space when at full capacity
For slabs on grade in CZ 4 and higher, 100% of slab edge insulated to ≥ R-5 at the depth specified by the 2009 IECC and aligned with thermal boundary of the walls
Form a sheet metal shield around the flue pipe
Form sheet metal shield around pipe keeping 3-inch clearance
Form sheet metal shield around pipe keeping 3-inch clearance
Formable pan flashing and back dam for window
Formula 4.2 from ASHRAE 62.2-2010 for fan flow rate required to achieve an effective ventilation rate
Frame, insulate, and air seal the walls of the skylight shaft as you would an exterior wall
Framing allowed duct work to be properly installed without compression
Fresh air inlet located in ceiling of covered porch
Fresh air inlet located in eave of roof
Fresh air inlet on side of house
Function of controls is not obvious
Function of ventilation controls is obvious (e.g., bathroom exhaust fan) or, if not, controls have been labeled
Furnace filter resistance varies by surface area; deeper pleats add surface area
Furnace filters that are MERV 6 or higher protect the HVAC equipment and improve indoor air quality
Furnaces, boilers, and water heaters located within the home’s pressure boundary are mechanically drafted or direct-vented
Furred-out siding
Gaps at shared common walls can be a significant source of air leakage in multi-family buildings
Garage ceiling with spray foam flash air seal plus batt insulation
Garage wall rim joist open to area between or under floors of living space
Gasket installed along entire seam of the modular home marriage joint
Gasket installed at marriage wall connection prior to assembling modules
Gasket installed at marriage wall connection prior to assembling modules
Grade-level drainage
Grill and duct size based on calculated requirements for net free area
Gutter channel
Hand tools for cutting fiber board sheets include a knife, straight edge, and color-coded edge-cutting tools
Hanger straps should be at least 1.5 inches wide
Heat Recovery Ventilator (HRV) or Energy (Enthalpy) Recovery Ventilator (ERV)
Heated air flow is produced when the heating cycle is energized (set thermostat to “heat”)
Hidden sheet metal baffles prevent the transmission of light and sound through the transfer grille
High-Efficiency Gas Furnace
Hole drilled to verify sealant is present - Hole will be sealed after verification
House wrap is sealed at all seams and overlaps flashing to serve as a continuous drainage plane over the exterior walls.
HVAC duct layout
HVAC ducts, cavities used as ducts, and combustion inlets and outlets may pass perpendicularly through exterior walls but shall not be run within exterior walls unless at least R-6 continuous insulation is provided on exterior side of the cavity
ICF forms are filled with the use of a concrete pumper truck
ICFs provide continuous wall insulation from the roof to the footing with very little thermal bridging
Identify what materials will constitute the continuous air barrier around the building envelope.
Identify what materials will constitute the continuous air barrier around the building envelope.
Climate zone map
If a dropped soffit is used to house a duct, the soffit space must equal the duct diameter plus the insulation thickness
If airflow must be limited to a supply register, use balancing dampers at the trunk line rather than looping duct to control airflow
If fans share common exhaust duct, back-draft dampers installed
If filter is inaccessible, locate the air filter between the return air plenum and the air handler box
If furnace is accessible, locate the air filter between the return air plenum and the air handler box
If HVAC duct must be installed in an exterior wall, separate it from the exterior with at least R-6 of continuous rigid insulation
If the furnace is hard to access, locate filters at return registers covered by hinged grilles that are easy to open from inside the home
If wall registers are desired, install HVAC ducts in interior wall cavities
 Impervious surfaces like patio slabs, sidewalks, and driveways that are within 10 feet of the home should slope away from the house.
Improper flashing can allow rain water into walls, causing significant damage
In 2009 IECC CZ 5 and higher, install self-sealing bituminous membrane or equivalent over sheathing at eaves from the edge of the roof line to > 2 ft. up roof deck from the interior plane of the exterior wall.

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