The answer to 'why is my deck pests' is that decks can attract a variety of pests, including termites, carpenter ants, wood-boring beetles, and even rodents. These pests are attracted to the wood and can cause significant damage to your deck if left untreated.
The most common signs of a pest infestation on your deck include visible damage to the wood, such as holes, tunnels, or sawdust, as well as the presence of the pests themselves. You may also notice a musty or damp odor, which can be a sign of a moisture problem that can attract pests.