?Hello, everyone. I’m Joshua Clement, and this is what is the thickness of R 13 insulation. Now it’s very important to know how thick your insulation is because if you are installing it in a normal 2 x 4 wall you don’t want to go with something like an R 19 which will pop out of your studs, break your drywall and you will lose R value. Here we have some fiberglass insulation, unfaced that is an R 13, R 13 is designed to go into your 2 x 4 studs, 16 inches on center or 24 inches on center, whichever you buy. So when you are installing it, a 2 x 4 is 3 and 1/2 inches wide. So when you go to buy it you want to remember that R 13 is 3 and 1/2 inches thick which slides right into a 2 x 4 which is 3 and 1/2 inches thick. That way you don’t have much bubbling over, your insulation won’t be smashed in there which will cause you to lose your R value. Insulation is designed to be nice and fluffy. If you start smashing it in there, it’s going to compress it and do you practically no good. You want to keep it nice and fluffy when it’s being installed. Here is a normal 2 x 4. As you can see, when we set it right up next to our insulation, it goes nice and flush across there and then you are able to put a vapor barrier over top of it which will hold all your insulation into place after that vapor barrier is installed which should give you an R 13. If you try to smash it in between like cracks and doors or something like that, it’s not going to work as well as if you slowly push it in there without trying to smash as much in there as possible. So in short, R 13 insulation is the same thickness as a 2 x 4 which is a 3 and 1/2 inches. Thank you all for watching and good luck with this project.
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