colin brown wrote:
The short answer is that you are all correct ! I believe the history has been that wood / csm canoes leaked, so to prevent sinking additional buoyancy in the form of bags were added. Later foam which did not soak up water was used. Then along came thin core foam sandwich, say 6mm thick hulls with wooden decks, foam still was added. In the recent past we have all thin foam canoes still with added buoyance foam. Now builders are using foam to support the structure in vast quantities and up to 50mm thick. This is a recent development and logic says that all this foam could be included in the 75 kgs that required. As a measurer , not the rule writer I will refer the matter to the BCU / ICF for clarification. Please also note the builder certifies that he has 75kgs of buoyance if it cannot be inspected. Its your responsibility
Was there ever a definitive answer on this one ? Apologies if it was mentioned in another thread.