hi gardner,   what's the round tower building attached to the barn?   Are these foams just brand namesor are they actually totally different types of foam. And Rob, what is the foam I/we use called?   Doug --- On Sat, 13/6/09, gardnerpomper <gardner@networknow.org> wrote: From: gardnerpomper <gardner@networknow.org> Subject: [harryproa] Re: AirCell tested and fails (I think) To: harryproa@yahoogroups.com.au Date: Saturday, 13 June, 2009, 8:26 AM Hi, I have posted some more photos into the Aircell Testing phot folder of this group. I redid the tests with 1" corecell. My results were: 1) hammer test - smashed foam, broke fiberglass, delaminated. I think this test was excessive 2) hand sledge against wood block hit 10 times hard - no effect. Slight indentation on top side, no delamination on either side. Much better than Aircell in this test I then added another test, which was to put the panel on the floor, climb up on the table and drop the hand sledge (about 5 lbs) from as high as I could reach. I figure this is a 10' drop. 1) Aircell - dented, no delamination 2) Corecell - dented, no delamination They both seem to be pretty equivalent on this test. I think this highlights that if you are going to toss sledgehammers onto your deck, you should probably have more than 1 layer of 18oz fiberglass on the topside. Not sure if it tells me anything else. I think the other test that I should run is to have a bigger panel, supported on either end and jump up and down on it over and over. The problem is that is a very expensive test. Shipping on all this material is running at 20% (or more) of the purchase price. I wish there was a place around where I could get it. So far, I am 400 miles from each of 3 sources. Comments are welcome, as always. - Gardner