SATURATION TEST OF BALSA WOOD:

Some FRP repair shops claim that Balsa Wood core material rots immediately upon exposure to water and is an inferior product, etc. Therefore, their support of claims of hull damage that allowed water to contact the core was a recent occurrence as commonly reported by the insured.

Commencing January 6, 1997, 7 pieces of end grain Balsa core material were placed in a 12 oz Styrofoam cup. Each piece was about 1" X 1" square and about ¼" thick. The brand of coring was unknown. Sufficient water was added to fill the cup about 2/3 full.

After about 48 hours, the surface of the wood was distorted, (bent) soft and the pieces would crack easily if bent. The pieces were not rotted.

After about 22 days, the water had evaporated. The wood was soft but not rotted. More water was added.

Over the next 5 months, the water was allowed to evaporate several times and the wood dried out.

After an additional month (6 months), the wood was black but not rotted.

After the 7^th month, the wood was black, damp but not rotted.

Over the 7 month period, the lid was kept on the cup for extended periods of time and also left off for short periods of time to simulate time afloat & ashore.

Conclusion:

Balsa wood does not rot immediately upon exposure to water. Deteriorated and rotted Balsa cores have likely been exposed to water for a prolonged period of time, (6 + months) before rot commences.

Test conducted by: George R. Barber, AMS-SAMS, Davis & Co., LTD.

Report dated: March 26, 1998
At: St. Louis, Missouri