If the hole in the ceiling is so large that the construction adhesive won t stay then use spray foam to fill the gaping hole and then use the construction adhesive to hold the threaded insert.
Attach vent to ceiling.
Drill a hole into the ceiling drywall at each mark.
Mark the holes in each corner or on each side with a.
Remove the register drill holes at the marked locations install drywall anchors and then screw the register in place.
Duct already wrapped in insulation at home centers.
You will just have to find a way to mount the cover either by installing the adapter tight to a ceiling joist or by building a frame around the adapter.
Place the vent.
The most common solution is to add a vent adapter to the existing pipe and attach a vent cover over the ceiling panel.
Get this vent register right here.
Although this isn t always possible in attic crawl spaces you should always insulate the duct to prevent condensation problems.
The drill bit should be slightly smaller than the drywall.
Use an extra long 3 8 inch diameter spade bit to bore a reference hole through the ceiling and into the attic.
Lay the back of the vent on the ceiling covering the open duct.
Use liquid nails to fasten a threaded insert regular gyproc units will be fine where the holes in the vents are.
For optimum performance locate it between the shower and the toilet.
How to adhere a ceiling vent to drywall 1.
Hook included lanyard to ac grille making sure to keep the connection as close to the center as possible tighten the cord using the included cord lock until the vent cover is tightly sealed around the air conditioner vent feed the lanyard into the hole in the.
The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a special vent hood.
Drill a hole in either side of the register and then put the register up in the ceiling and mark the holes with a pencil.
There are several choices to make with this situation.
Draw a mark on the bathroom ceiling where you d like to install the vent fan.
Climb into the attic and clear away any insulation from around the hole.
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