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A second layer of rigid insulation is installed over the 2 in. by 4 in. retaining strip
A second layer of rigid insulation is installed over the 2 in. by 4 in. retaining strip
A second layer of rigid insulation is installed over the 2 in. by 4 in. retaining strip
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Assembled section of fiber board duct
Assembled section of fiber board duct
Assembled section of fiber board duct
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Cut fiber board with a red V-groove tool and a gray shiplap tool to create mitered corners and a shiplapped edge for duct sections
Cut fiber board with a red V-groove tool and a gray shiplap tool to create mitered corners and a shiplapped edge for duct sections
Cut fiber board with a red V-groove tool and a gray shiplap tool to create mitered corners and a shiplapped edge for duct sections
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Cut-away view showing unsealed gaps around a heating duct that goes through a wall
Cut-away view showing unsealed gaps around a heating duct that goes through a wall
Cut-away view showing unsealed gaps around a heating duct that goes through a wall
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Duct boots and other ceiling penetrations are air-sealed using spray foam
Duct boots and other ceiling penetrations are air-sealed using spray foam
Duct boots and other ceiling penetrations are air-sealed using spray foam
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Encapsulated ducts are sprayed with ccSPF in an unconditioned attic
Encapsulated ducts are sprayed with ccSPF in an unconditioned attic
Encapsulated ducts are sprayed with ccSPF in an unconditioned attic
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Fiber board sheets are available with pre-cut shiplapped ends
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
Fiberglass duct board typically comes in sheets 4 foot wide by 10 foot long
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Form a sheet metal shield around the flue pipe
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
Form sheet metal shield around pipe keeping 3-inch clearance
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Hand tools for cutting fiber board sheets include a knife, straight edge, and color-coded edge-cutting tools
Hand tools for cutting fiber board sheets include a knife, straight edge, and color-coded edge-cutting tools
Hand tools for cutting fiber board sheets include a knife, straight edge, and color-coded edge-cutting tools
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Install wood framing cross pieces in the attic rafter bays on each side of the duct chase
Install wood framing cross pieces in the attic rafter bays on each side of the duct chase
Install wood framing cross pieces in the attic rafter bays on each side of the duct chase
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Right – Duct register is mastic sealed to framing
Right – Duct register is mastic sealed to framing
Right – Duct register is mastic sealed to framing
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Right – Flex duct is mastic sealed at junction box
Right – Flex duct is mastic sealed at junction box
Right – Flex duct is mastic sealed at junction box
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Right – Metal duct boot is properly sealed at seams
Right – Metal duct boot is properly sealed at seams
Right – Metal duct boot is properly sealed at seams
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Right – Metal is mechanically fastened at junction
Right – Metal is mechanically fastened at junction
Right – Metal is mechanically fastened at junction
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Right – Metal or fiberboard duct is mastic sealed at junction with duct register box
Right – Metal or fiberboard duct is mastic sealed at junction with duct register box
Right – Metal or fiberboard duct is mastic sealed at junction with duct register box
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Right – Metal or fiberboard duct is mastic sealed at seams
Right – Metal or fiberboard duct is mastic sealed at seams
Right – Metal or fiberboard duct is mastic sealed at seams
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Seal seams in fiber board ducts with out-clinching staples, UL-181A-approved tape, and mastic
Seal seams in fiber board ducts with out-clinching staples, UL-181A-approved tape, and mastic
Seal seams in fiber board ducts with out-clinching staples, UL-181A-approved tape, and mastic
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Spray foam insulation used for raised ceiling duct chase
Spray foam insulation used for raised ceiling duct chase
Spray foam insulation used for raised ceiling duct chase
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Wrong- A tie strap should not be used over the duct outer liner because it can compress the insulation. Tuck in the fibrous insulation and seal the outer liner to the connecting duct with mastic or foil tape (Steven Winter Associates 2013).
Wrong- A tie strap should not be used over the duct outer liner because it can compress the insulation. Tuck in the fibrous insulation and seal the outer liner to the connecting duct with mastic or foil tape (Steven Winter Associates 2013).
Wrong- A tie strap should not be used over the duct outer liner because it can compress the insulation. Tuck in the fibrous insulation and seal the outer liner to the connecting duct with mastic or foil tape (Steven Winter Associates 2013).
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