This is why they become noticeable in the winter.
Silverfish on roof.
They look for starch and sugar and some of their favorites are books and newspapers.
From there they ll migrate into homes when it gets cold.
Silverfish are a relatively easy insect to control if you spot the signs of them.
In fact shake roofs are excellent breeding sites for silverfish during the warmer months as they have an abundance of moisture cellulose starch and dead insects.
They can be especially attracted by mold and wood rot that result from a leaky and damp roof.
They also love fungal molds like those that are common on cedar roofs as well as cellulose which is often found in shampoo shaving cream and other similar products.
Silverfish can be found almost anywhere in a house including living rooms bedrooms bathrooms attics basements garages and shake roofs.
Silverfish can also enter your residence by way of cracks and unseen holes in your roof.