2 pads better than 1?

[ATGIRL2028]

My husband has a pad w/ R value of 4.4 and just bought another one with the R value of 2.0 in hopes of layering to keep warmer. Will this give him an R value of 6.4? What temps could he get down to with both of these?

[mando]

R-value is indeed additive. More info here: https://sectionhiker.com/sleeping-pad-r-values/

[4estTrekker]

Indeed. Not sure of the temps you can prescribe for those two R values, but pads work in an additive manner. I use the Klymit Insulated Static V year-round in my bridge hammock and add an underquilt when temps really drop. But when I'm on the ground, I add a second pad in winter temps, usually my Z-Lite, which works great as a larger sit pad when I'm not sleeping.

[Shug]

Yes...just add the two r-values of the pads and that is where you are.
Shug

[BillyBob58]

As every one else said: yes, just add the R values. But the trick will be to keep them one on top of the other. I don't have a ton of pad experience. However, once, using something that used to be known as a Speer SPE- or segmented pad extender- I stacked 1 full length and 1 torso sized pad, these were 2.6 R each. It kept me toasty a bit below 20F. Th SPE kept the pads from moving. But, I know you are very cold natured, so I don't know if those pads would have kept you as warm.

[vol84eng]

I have tried to sleep on a pad but I always wake up cold with the pad over to one side. I have not been able to figure out how to keep it angled the way I hang and to keep it under me.

[FLTurtle]

I have tried to sleep on a pad but I always wake up cold with the pad over to one side. I have not been able to figure out how to keep it angled the way I hang and to keep it under me.

I fixed my pad issues in a hammock by switching to an underquilt.

[tsshaw78]

I made some cool weather underquilts for my kiddos but to get to lower temps, I had success in placing a pad between the underquilt and the hammock. It did reasonably well to keep the pad in place and provided the extra warmth they needed.
Not practical for backpacking in but was ideal for car camping.

[gunner76]

If you are going to use pads then using them with a DL hammock is the way to go as placing the pad(s) in-between the two hammock layers will help to keep them from shifting. You can also run some silicone side to side on the pads to help reduce slipping. Personally I recommend using UQ's.