Raise the roof jack crown by 18 inches.
Roof jack installation instructions.
If following any of the installation steps would endanger a worker the erector should stop work and decide upon a corrective action.
Prepping installation carefully place a ladder by the side of the roof and make sure that it is stable and secure.
Installing the roof jack 1.
With these instructions you will soon be a pro at installing roof jacks and get your roof done in no time.
The metal i m using is called crinkle black i purchased all my materials at h.
1 roof jack assembly 1 barometric damper 1 small front cover plate 1 large front cover plate 1 slide in damper 12 sheet metal self tapping screws used on roof jack assembly 2 apron 2 collar 1 flex duct 18 inch diameter by 7 feet long not included screws or nails to mount roof jack assembly onto roof roofing sealant caulking duct tape.
Apply caulking compound on the underside of the roof flashing to form a continuous strip about 1 1 2 wide around the underside of the perimeter of the flashing.
Roof jack assembly 129098 uim h 1011 caution use 1 2 1 27 cm blunt or sharp end sheet metal screws to fasten com int roof jack combustion air pipe to furnace combustion air collar screw holes are provided in pipe and collar.
Remove upper and lower cap.
Way to install the roof system.
Install only roof jack assemblies listed in table 4 on this heating appliance.
In this video i cover installing a roof boot for a vent pipe in a metal roof.
One extension will step 1.
1 determine depth of ceiling cavity from center of roof opening to center of ceiling opening dimension a in figure 16.
Boss roof jack sealant lower solid door part 7900 7611 finger tab duct connectors 7990 6211 1 duct connector.
Optional slant deck flashings roof jack slant deck.
Recommended roof cut out for roof jack.
Apply caulking to roof flashing.
Determine ceiling height and subtract height of furnace dimension b in figure 16.