Rmax Thermasheath-3 2 in. x 4 ft. x 8 ft. R-13.1 Polyisocyanurate Rigid Foam Insulation Board

The foil facing of this foam panel, is water shedding-capable. But the foam is “open-cell”, meaning it can act like a sponge with water, & it can grow mold within it’s foam. (Closed-cell foam does not soak-up water, nor can mold grow into it so easily; can wash it off closed-cell.) ALSO IMPORTANT: Use aluminum tape with a stickum that stays stuck even in humid, freezing climates...most aluminum tapes Fail in cold, damp climates. Average foil tape from big box stores, in our experience, ALL comes unstuck in moist cold weather...must get weather-proof tape to tape ends, edges or seams, to prevent humidity, or small critters, getting into the foam. SOME aluminum tape has a very thick, gluey stickum that usually stays stuck ok. Polyiso foams generally can have slightly higher R-value, compared with other 2” foam panels from big box stores; they just need protected from humidity & UV.

It should be sufficient. These panels are very light weight. They are also 4ft wide which I believe is less than standard distance between wall studs so you can also cut these to fit between the studs and press them in for a friction fit.

yes, If the silver side is in direct contact with the glass put this side to the interior of the room to create an additional radiant barrier. If you have more questions please contact our technical department at 972-850-3604 thanks.

Yes, it can be used anywhere it will be dry.

Check with the pro desk at your local HD.

The answer is yes to both questions. When installing to the concrete walls you must use large plastic pins along with special glue for foam board to make sure the board holds to the wall and sets up.

It certainly could be used that way, but bear in mind that it is a vapor barrier. You want to have just one vapor barrier in your walls, either inside or out. A vapor barrier on both will trap moisture within the wall and cause mold and rot. If your exterior wall already has a vapor barrier (vinyl siding, impermeable house wrap, etc.), then you will be better off using breathable unfaced (or paper faced) batt or blanket insulation, i.e. fiberglass or cellulose.

Yes, this item can be used to insulate your garage and closet.

Julie, Yes, it can be used under an inflatable hot tub, the only concern is preventing point loads (somebody jumping in their feet and applying to much pressure to the board) Not familiar with the base for an inflatable hot tub, but by putting sheetrock board or any board that can distribute the load it will work just fine.

LED's as a rule don't generate that much heat. Unless they are very high wattage bulbs, the surface of the bulb stays pretty cool.The LED bulb is in a socket so I would think as long as you don't interfere with the socket, you should be fine. You could also get a thermometer and see what temps are present around the bulb.....just to be safe.