Should you install insulation in an exterior/outdoors ambient temperature setting.
I’m a home owner completing a renovation to my house in Florida. The 3rd story exterior sundeck tile floor functions as a flat roof for the 2nd story exterior deck. I’m going to be installing cypress T&G as the ceiling for the 2nd story deck. (IE: the Cypress T&G ceiling will be fastened to the LVL beams holding the 3rd story deck up.)
The question is this; should I install insulation before I put up the T&G ceiling? My concern is if I don’t install some kind of insulation the T&G might be impacted/warp by heat being generated from the sun hitting the tile floor of the 3rd story deck, radiating down into the cavity where the LVL’S are and ultimately into the T&G ceiling of the 2nd story damaging the T&G.
However, some folks say it will be a mistake to install insulation, waste of money, it will simply hold humidity/moisture and serve no purpose as there’s ambient temperature on both sides of the structure (3rd story floor and 2nd store ceiling).