Yes, a ceiling support/firestop and insulation dam (if attic) is needed.
Thanks for the info and link.
If it’s a single wall vent it needs a vent thimble (heat collar). Double wall vent can be installed either with a thimble or with adequate clearances to combustibles without a thimble.
David the ( ounce of pervention-------- ) saying might go nice on you website.
Below you company name.
Just what are you accusing David of here, Robert? :shock::shock:
Look at my site JJ.
" Forewarned is forearmed."
Did not mean to go off tract.
ounce of pervention-------- spell checker let it slip through. Opps.