In connection with the leakage of rainwater into the crawl space through the vent in the picture (vent a couple of decimeters below ground level), I became concerned about the foam plastic that a previous owner had installed. I removed a few panels... nudged a couple to the left... and suddenly LECA pebbles just FALL from the stones behind. I guess they were placed there to try to raise the temperature by a degree or so. I’m thinking of laying diffusion-tight plastic... and considering if I should tuck it a couple of decimeters behind the foam plastic. Now I'm wondering if foam plastic and Leca stones might not be a good combination... especially if there's external moisture pressure. The house is slightly on a slope, and on this side, the ground level is roughly at the top of the vents... perhaps a bit higher.
I’m also posting a couple of pictures of the temperature and relative humidity in the crawl space over the past week. The spike on the graph is when I was down yesterday and held my hand over the sensor just to see that it's "alive." Despite the high humidity over the years at this time of year, there's very little growth on the asfaboard... although you can see a little white “dust” here and there.
So... foam plastic against Leca stones under these conditions... should it be removed, do you think? Replaced with something else? Any other ideas and suggestions?
I’m also posting a couple of pictures of the temperature and relative humidity in the crawl space over the past week. The spike on the graph is when I was down yesterday and held my hand over the sensor just to see that it's "alive." Despite the high humidity over the years at this time of year, there's very little growth on the asfaboard... although you can see a little white “dust” here and there.
So... foam plastic against Leca stones under these conditions... should it be removed, do you think? Replaced with something else? Any other ideas and suggestions?
