Originally Posted by Jgbrown
Still uncertain on the whole dehumidify and venting at the same time(seems counterproductive to do a lot of both.
I found the hypervent as a construction material(called examat) but no source to buy it from in the quantities I want. I'll pay the price at the marine store I guess, and get some more of it. I have it already under my settees, and in the lazarette seems to allow decent drainage, and I haven't seen any mold on it yet.
I have seen a very similar product sold as roof ridge vent mat at most Big Box stores, but it comes in fairly narrow strips (likely good for settees) and long full rolls, but I think it was less than $50 for a 10.5 inch by 20 foot (Crobra brand by GAF).