First understand that silverfish will live on roof tops under shingles around gutters and under exterior siding.
Silverfish on roof.
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.
Silverfish can also enter your residence by way of cracks and unseen holes in your roof.
How can you get rid of silverfish in wood.
They can be especially attracted by mold and wood rot that result from a leaky and damp roof.
Silverfish look for homes that provide not only great food sources but also solid place to hide.
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.