Hi, First time trying to use this blog thing so here goes. We're taking up the diamond pattern cork material from the deck of our Catfisher. Using a hot air gun and a Bosch electric scraper it is far easier than imagined. However as always, lift the rug and what do you find? On the starboard side adjacent to the start of the wheelhouse there has always been a bulge which flattened out if you walked on it. We always assumed there was an air bubble under the treadmaster or whatever the cork stuff is called. Having removed the cork the bubble is still there. About 12 inches long by approx 3 inches. The surface is very pliable suggesting that the material is not very thick. Could it be that the gelcoat and perhaps 1 layer of GRP has delaminated from the rest of the deck thickness. My idea would be to cut along the length of the bubble to allow it to collapse and then slosh thickened epoxy underneath and stick it back down to the remaining deck laminate. Has anyone seen this before and if so should I panic or just repair it. Thanks Lloyd