Here is my setup on thanksgiving night.
Black Diamond Lighthouse tent sitting on a Tyvek groundsheet
Ridge rest(at least 8 years old)
Sleeping in BPL merino top, patagonia R1 hoody, balaclava on my head, capilene bottoms and heavy wool socks on my feet
Here are the conditions:
27-29 degree very clear night camped near a stream in a gulley (Cold spring hollow on the rip rap trail in Shenandoah NP). Katabatic air currents could of been at play.
I did not expect to be cold using this setup, to the contrary I expected to be quite warm and to have to remove layers. What happened instead is that I woke up very cold and shivering several times in the night with very cold spots under me wherever my body was in contact with the pad. There also seemed to be moisture condensating on the top of the ridgerest below the sleeping bag.
Ground was not frozen where we were camped. I suspect the ridgerest was just not providing enough insulation. Do they do this over time. Does it make sense that I could feel this cold because of inadequate insulation? I've used this pad for a number of years and have never experience this before. But it did happen on another trip recently with a synthetic bag. So I am beginning to suspect the ridge rest has lost some of it's R value???
My girlfriend sleeping on a thermarest with a BMW torsolite for added insulation slept like a baby. It was her first backpacking trip so I made sure she was comfy...she was wondering why I did not manage to stay warm however.
If this pad is not adequate in these conditions the next question is what is the best replacement for the fall/spring colder shoulder seasons when I do not want to lug two pads for myself and I'm not camping on snow. But I need adequate insulation.
MEC yellow evazote?
Any insight into what my problem might be and suggestions for fixing it would be most appreciated