CBII

Istanbul and Bodrum, Turkey
Summer 2011

Bringing the dinghy down to a vacant lot, the first step in preparing it as a mold will be a reversal of its construction. This requires removing the keel. 

After applying a thin coat of boat varnish to all surfaces to be cemented, I assemble my supplies and begin tests with cements, wire meshes and the floor soap that I hope will act as a release agent between the wood and the cement.

The heavy stock of the false keel* removed, the protruding section of sternpost and a section of the bow are sawed off, making a flat bottom for what will become the inside of the cement cast. The sections are kept to be copied in cement and added to the final form. 

After applying a thin coat of boat varnish to all surfaces to be cemented, I assemble my supplies and begin tests with cements, wire meshes and the floor soap that I hope will act as a release agent between the wood and the cement. 

An initial layer of white Portland cement, sand and water (in a ratio of 3:3:1-1.5) is spread over the test area to pick up as much detail of the hull as possible. A layer of wire mesh is laid into the surface of this first coat to assure that the subsequent structural layer will adhere to this crucial internal layer. 

Having been kept wet overnight, the first layer has cured. Three layers of chicken wire and a final layer of mesh are put in place.

Heavier cement is pressed through the wire layers to produce a strong though flexible steel and concrete outer layer. After curing, the sample is removed and kept wet as long as possible. 

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