Sorry to suggest this but you might find that the freezer treatment is not very effective, in fact it could exacerbate the problem...
And the reason.... These little wonders of the animal world survive the winter, otherwise Scotland would be a woodworm free zone, living in Scandanavia would be woodworm free, but its not. The life cycle of the woodworm beetle is regulated by the seasons like all things except humans who are non seasonal bunnies. However as woodworm beetles dont have recreational sex, they breed, lay their eggs and the eggs hatch in the spring. The eggs survive in wood for up to three or more years before they emerge to see which delicacy they were born into. Fact - eggs survive sub zero tempreatures.
What happens after winter? Spring and all the flowers burst into colour, the world cheers up and the little shits in your wood shed decide its time to inflict themselves on the world and wreak havoc.
So youve put the wood in the freezer, a bit like forcing the narcissus or the big bulbs that you shove in the dark or the fridge and they come up over christmas (begins with H but cant remember what theyre called) and all the larvae have died because they think they have been caught out because its winter and shuffle off their mortal coil. But the eggs, emerging from the freezer, warm up and think that it is now time to spring forth, and soon after you take them out of the freezer into the warmth of the surrounding world, the problem is back with a vengeance.
My mate who is a professional rat catcher (Pest exterminator contractor to be politically correct) offered this: if you cant soak it or want to soak it, burn it. He added if you do have sacrificial timber in your shed which will do some good, burn it in February after you have replaced it. The larvae will then not yet have emerged in March/April time.
