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Exterior fiberglass insulation on this new home was (incorrectly) cut to terminate below-grade after backfill, which will expose the above-grade portions of the foundation wall to cold temperatures

Exterior fiberglass insulation on this new home was (incorrectly) cut to terminate below-grade after backfill, which will expose the above-grade portions of the foundation wall to cold temperatures
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Exterior storm window

Exterior storm window
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Exterior window replacement detail

Exterior window replacement detail
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Exterior XPS basement insulation is correctly installed to completely cover the foundation wall

Exterior XPS basement insulation is correctly installed to completely cover the foundation wall
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Faced fiberglass batt insulation can be stapled to the stud faces or slightly inset, but avoid compressing the batts

Faced fiberglass batt insulation can be stapled to the stud faces or slightly inset, but avoid compressing the batts
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Faced fiberglass batt insulation incorrectly installed

Faced fiberglass batt insulation incorrectly installed
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Failure in attic insulation effectiveness caused by wind washing pushing insulation away from the edges of the attic space.

Failure in attic insulation effectiveness caused by wind washing pushing insulation away from the edges of the attic space.
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Fiber board sheets are available with pre-cut shiplapped ends

Fiber board sheets are available with pre-cut shiplapped ends
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Fiberglass duct board typically comes in sheets 4 foot wide by 10 foot long

Fiberglass duct board typically comes in sheets 4 foot wide by 10 foot long
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Fiberglass mesh tape is installed around a duct boot in preparation for air-sealing the seams with mastic.

Fiberglass mesh tape is installed around a duct boot in preparation for air-sealing the seams with mastic.
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Fill in the hole left by the missing top plate with a rigid air blocking material or rolled batt insulation that is spray foamed in place

Fill in the hole left by the missing top plate with a rigid air blocking material or rolled batt insulation that is spray foamed in place
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Flat roof with cavity spray foam plus loose-fill insulation and gypsum board thermal barrier.

Flat roof with cavity spray foam plus loose-fill insulation and gypsum board thermal barrier.
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Flip the breaker to turn the heat pump water heater back on after cleaning the air filter

Flip the breaker to turn the heat pump water heater back on after cleaning the air filter
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Floor cavity air pressure is measured by placing a tube into the floor cavity through a small drilled hole

Floor cavity air pressure is measured by placing a tube into the floor cavity through a small drilled hole
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Floor cavity pressure is measured by inserting a tube into the floor cavity using an extension pole

Floor cavity pressure is measured by inserting a tube into the floor cavity using an extension pole
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Floor joist cavities can make acceptable duct chases

Floor joist cavities can make acceptable duct chases
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Floor joist cavities can make acceptable duct chases

Floor joist cavities can make acceptable duct chases
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Flowhood is sealed against the irregular surface using pipe insulation along the edge of the hood to complete an airtight seal around the terminal.

Flowhood is sealed against the irregular surface using pipe insulation along the edge of the hood to complete an airtight seal around the terminal.
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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

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
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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 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
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For homes with heating registers in the ceiling or floor, air seal where the duct boots meet the ceiling drywall or the flooring to prevent heat loss around the register.

For homes with heating registers in the ceiling or floor, air seal where the duct boots meet the ceiling drywall or the flooring to prevent heat loss around the register.
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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

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
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Form a sheet metal shield around the flue pipe

Form a sheet metal shield around the flue pipe
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Form sheet metal shield around pipe keeping 3-inch clearance

Form sheet metal shield around pipe keeping 3-inch clearance