Woodworm undergo a metamorphosis similar to caterpillars, but the end result is less colorful. They develop into woodboring beetles that have a miniscule lifespan: 10-14 for females and 3-6 for males. However, the larvae stage of the woodworm’s lifespan is the most detrimental to your structural timber and foundations. This stage can last for several years, which is why it’s crucial to clear the infestation as soon as possible. The beetles are not as dangerous as the larvae.