I just wanted to start a conversation about "permeable" pavers. I put quotes around that phrase because I sort of question really how permeable they really are. I'd love to see some numbers on that. Regardless, I almost never get a request for these. Every once in a while (1 out of 20 calls) I will get someone ask me about them. But then as we get into discussing the advantages and disadvantages, they always end up talking themselves out of it. Then we end up building them a regular paver patio. It seems like one of those things that the "industry" thinks is really hot, but - at least in the residential market - isn't really hot afterall. First off, I've never seen one that looked all that impressive. The few that I have seen look a little too 'commercial' and not very attractive. When I see one, I am usually thinking to myself, "Hmmm... Permeable pavers.... Well, that's interesting." I never say to myself, "Wow! That patio looks sharp!" So I a hesitant to get into doing them just for that reason alone. I also hesitate because I read somewhere that they really aren't that permeable. It was in one of my trade journals, I think. But I can't remember which one or when I read that. So I wonder really how permeable these things really are. Are they 75% gimmick and only 25% really helpful? Another hesitation is the gravel that has to go in the joints. My experience with wider joints and having gravel in them (the few times we've done that with flagstone) is that the gravel is constantly coming out of the joints and creating a mess. Also creates more maintenance as you have to replenish the gravel or sand more frequently, I would think. Anyway, they're not that popular with residentials so far - at least not yet. But I do see a little bit more interest in them these days. Got a call today for one. Just not sure I want to go down that road. I'm pretty happy just using the pavers we use now. They always turn out great and very little maintenance and our customers love them. I'd love to hear your opinions, see any studies or articles you guys can point me to regarding how permeable they really are, see some photos of ones you've done, hear about what kind of interest you're getting from residential clients in your area, etc. .