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The existing 2x8 roof rafters were topped with OSB; two layers of 2-inch rigid foam; plywood; ice and water shield at rakes, eaves, and valleys; underlayment; and fiberglass shingles, plus 6 inches of open-cell foam under the decking.

The existing 2x8 roof rafters were topped with OSB; two layers of 2-inch rigid foam; plywood; ice and water shield at rakes, eaves, and valleys; underlayment; and fiberglass shingles, plus 6 inches of open-cell foam under the decking.
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The existing dark tile roof on this home (top photo) was covered with a light -colored coating on day 6 (middle photo), resulting in a significant reduction in attic temperature and cooling energy consumption (bottom)

The existing dark tile roof on this home (top photo) was covered with a light -colored coating on day 6 (middle photo), resulting in a significant reduction in attic temperature and cooling energy consumption (bottom)
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The existing flat roof before removal of membrane shows lack of slope allowing water to pool on the surface

The existing flat roof before removal of membrane shows lack of slope allowing water to pool on the surface
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The existing sheathing boards are removed near the perimeter of the flat roof and pressure-treated plywood is installed at the vertical face of the parapet

The existing sheathing boards are removed near the perimeter of the flat roof and pressure-treated plywood is installed at the vertical face of the parapet
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The gap between the air filter and the return duct opening has been sealed with tape that will stop air flow but is easily pulled off or cut through when the filter needs to be replaced.

The gap between the air filter and the return duct opening has been sealed with tape that will stop air flow but is easily pulled off or cut through when the filter needs to be replaced.
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The geometry of this roof encouraged drifting of snow leading to heavy accumulation between the gables

The geometry of this roof encouraged drifting of snow leading to heavy accumulation between the gables
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The green framing is lumber that was pressure treated with borate to increase its resistance to termites, mold, and moisture

The green framing is lumber that was pressure treated with borate to increase its resistance to termites, mold, and moisture
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The icicles and the bare spot along the left roof ridge indicate that heat from the second-story room may be heating the underside of the roof deck, melting the snow and likely leading to ice dam formation.

The icicles and the bare spot along the left roof ridge indicate that heat from the second-story room may be heating the underside of the roof deck, melting the snow and likely leading to ice dam formation.
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The Importance of a Continuous Load Path

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The individual exhaust systems for each dwelling unit in this multifamily building result in large numbers of penetrations in the exterior façade

The individual exhaust systems for each dwelling unit in this multifamily building result in large numbers of penetrations in the exterior façade
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The light fixture is connected to the exhaust fan with an electric wire which is sometimes hard wired but in this case is plugged in so it can be unplugged to clean the light fixture and access the fan for cleaning

The light fixture is connected to the exhaust fan with an electric wire which is sometimes hard wired but in this case is plugged in so it can be unplugged to clean the light fixture and access the fan for cleaning
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The location of furnace and water heater flues can be identified by going outside and looking for metal pipes coming through the roof.

The location of furnace and water heater flues can be identified by going outside and looking for metal pipes coming through the roof.
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The manometer hose for a duct leakage test is connected to a static pressure probe which will be inserted into a duct with the tip pointing into the oncoming air stream

The manometer hose for a duct leakage test is connected to a static pressure probe which will be inserted into a duct with the tip pointing into the oncoming air stream
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The manufacturer’s label found on this exhaust fan housing shows a sone rating of 1.0

The manufacturer’s label found on this exhaust fan housing shows a sone rating of 1.0
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The mechanical curb for a skylight is integrated with the water management and air control layers on a flat roof retrofitted to include new above-deck rigid foam insulation

The mechanical curb for a skylight is integrated with the water management and air control layers on a flat roof retrofitted to include new above-deck rigid foam insulation
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The metal flashing used at this wall-to-roof transition is incorrectly layered over, not under, the siding, and is nailed into the siding, creating holes where water can infiltrate the wall.

The metal flashing used at this wall-to-roof transition is incorrectly layered over, not under, the siding, and is nailed into the siding, creating holes where water can infiltrate the wall
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The nut holding the light housing in place in this combination exhaust fan/light can be unscrewed by hand

The nut holding the light housing in place in this combination exhaust fan/light can be unscrewed by hand
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The open-web roof and floor joists, laminated beams, and I-beams reduce raw lumber use and increase load-bearing capacity, while resisting shrinking, twisting, splitting, and warping.

The open-web roof and floor joists, laminated beams, and I-beams reduce raw lumber use and increase load-bearing capacity, while resisting shrinking, twisting, splitting, and warping.
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The OSB roof decking product comes with an adhered radiant foil barrier which helps to prevent heat transfer in or out of the vented attic, while R-13 unfaced fiberglass fills the advanced-framed 2x6 walls.

The OSB roof decking product comes with an adhered radiant foil barrier which helps to prevent heat transfer in or out of the vented attic, while R-13 unfaced fiberglass fills the advanced-framed 2x6 walls.
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The photovoltaic panels sit in a waterproof plastic tray that was installed directly on the roofing underlayment, then surrounded with roofing shingles.

The photovoltaic panels sit in a waterproof plastic tray that was installed directly on the roofing underlayment, then surrounded with roofing shingles.
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The pointed tip of this static pressure probe should point directly upstream into the oncoming airflow

The pointed tip of this static pressure probe should point directly upstream into the oncoming airflow
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The polyethylene ceiling vapor barrier is sealed to form an air barrier around the exhaust fan in this very cold climate location (≥ CZ 6).

The polyethylene ceiling vapor barrier is sealed to form an air barrier around the exhaust fan in this very cold climate location (≥ CZ 6).
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The retrofitted flat roof has PV panels and walking mats installed over the roofing membrane

The retrofitted flat roof has PV panels and walking mats installed over the roofing membrane
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The roof is constructed with a foil-faced radiant barrier sheathing.

The roof is constructed with a foil-faced radiant barrier sheathing.