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Capillary break at all crawlspace floors using ≥ 6 mil polyethylene sheeting, lapped 6-12 in., and lapped up each wall or pier and fastened with furring strips or equivalent
Capillary break at all crawlspace floors using ≥ 6 mil polyethylene sheeting, lapped 6-12 in., and placed beneath a concrete slab
Capillary break beneath all slabs (e.g., slab on grade, basement slab) except crawlspace slabs using either: ≥ 6 mil polyethylene sheeting lapped 6-12 in., or ≥ 1 in. extruded polystyrene insulation with taped joints
Catchment system
Caulk air seals the boot to the ceiling
Caulk applied against the backer rod to seal a window rough opening
Caulk around each piece of rigid foam in garage wall rim joist cavities
Caulk electrical boxes mounted in the ceiling
Caulk holes in the electrical box, caulk the wire holes, and caulk the face of the box to the drywall
Caulk or foam seal between the exhaust fan housing and the ceiling gypsum; install a gasket or caulk around the exterior exhaust duct vent
Caulk or glue along top plates before installing drywall
Caulk the drywall to the spacer board behind the stringer board
Caulk top and sides of window
Cavity used for return is not insulated and is not air sealed, which will pull in air from outside
Cavity was not air sealed
Ceiling opening for chimney chase
Ceiling opening for chimney pipe chase
Ceiling, wall, floor, and slab insulation levels shall meet or exceed Builders Challenge levels
Cellulose insulation is sprayed into wall cavities.
Cement board installed to a shower surround
Cement board installed to a tub surround
Central-fan-integrated supply ventilation with exhaust fans for intermittently balanced whole-house ventilation
CFM rating may not meet the performance specification once installed
CFM rating may not meet the performance specification once installed
Check the moisture content of wall materials to ensure materials are dry before enclosing walls with drywall and siding.
Chimneys and roof valleys are flashed with metal flashing that is integrated with roof shingles.
Choose high-performance ENERGY STAR-rated windows.
Clifton View Homes employs a SIP precision construction system consisting of structural insulated panels that come to the site precut for quick assembly, providing a continuous thermal blanket around the home.
Climate-specific features include bug- and moisture-resistant concrete block construction and borate-treated interior framing; a hurricane-resistant spray-foamed hip roof; and ventless roof soffits to keep out wind-driven rain.
Closed-cell backer rod for air sealing window and door rough openings
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.
Clothes dryers vented directly to outdoors, except for ventless dryers equipped with a condensate drain
Coated sheathing is used to box the windows in this double wall.
Collage showing air leak in existing porch wall with no air barrier and how air barrier was installed
Collars that are specifically made for flexible duct have a raised bead to prevent the duct from slipping off
Combined water and space heater using combi boiler
Combined water and space heater using storage water heater
Combined water and space heater using tankless water heater
Common exhaust duct not shared by fans in separate dwellings
Common wall sheathing not properly fastened or sealed
Common window water infiltration pathways
Compact duct design layout
Example of a compact duct layout showing a centrally located furnace (FAU)
Complete water management strategy for a below-grade wall
Comprehensive water management features include a capillary break (≥ 6-mil polyethylene sheeting) at all crawlspace floors
Concrete is being poured into the wall forms made by the rigid foam insulated concrete form blocks.
Concrete is poured into the rigid foam shell of the insulated concrete form (IC¬¬¬¬¬¬¬F) walls; a plastic water barrier has already been installed to protect the below-grade wall surfaces.
Concrete slab over polyethylene sheeting as capillary break
Concrete slab pan flashing for doors
Concrete slabs are used on both the first and second floors of this SIP home to provide passive solar heating from large south-facing windows.
Condensation potential for exterior storm retrofits
Condensation potential for interior storm retrofits
ENERGY STAR-certified clothes washers save energy and money for consumers
Connection in place but not sealed
Connector plate and drywall clips
Consider using a metal duct elbow instead of flex duct at boot connections to prevent compressions
Construct a double wall consisting of two framed walls forming a wide wall cavity for more insulation in the home’s exterior walls.
Construct exterior walls with insulated concrete forms (ICFs) that provide insulation without thermal bridging, as well as air sealing, a drainage plane, and high structural strength.
Construct exterior walls with structural insulated panels (SIPs) to provide an air-tight wall with consistent insulation and very little thermal bridging.
Continuous supply and exhaust fans rated ≤ 1 sone by manufacturer
Continuously-operating ventilation & exhaust fans include readily accessible override controls
Conventional T-post framing detail
Conventional three-stud corners leave a cavity that must be insulated by the framers—not good

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