You can find poisons in store or online.
Ants crawling side of house to attic.
Dry wood termites on the other hand look a lot like ants and would have more reason to be in your attic.
On the other hand ants may live inside the house.
There are aerosols and insecticides that can be poisonous to black house ants.
Ants in the walls.
It sounds a bit out of character for ants to be in your attic they generally only are found in places that have a food source of some type.
Light brown these ants are between 1 12 and 1 8 inch long.
Ants will build nests where ever they can find a suitable area to do so.
These ants are about 1 8 inch long and range from pale brown to black in color.
Other scenarios can be as easy to fix as getting rid of any ants that you see crawling around.
To find food to bring back to the colony and to seek shelter from cold weather conditions.
Phantom aerosol would be a good choice for you.
Phantom should be applied around baseboards door frames window frames and places where utilities cables pipes and wires enter through the wall as these are the most likely places for the ants to enter exit.
Ants usually live in wood or soil outside the house and only march into your house to gather food particularly during the spring and summer.
While it would be unusual to have an entire colony in your attic it is not unheard of.
This will erase the scented trails they leave behind.
The good news here is that the ants are visible to you and they are still going outdoors to forage which means they will walk through areas that that you treat outdoors.
Do this where you ve seen the ants feeding and by any ant trails you can find.
Set out short pieces of masking tape sticky side down and put a pea size dab of pesticide on top.
Depending upon distribution and cold weather conditions ants may be as likely to nest outdoors as indoors especially in many parts of the warmer more southerly portions of their distribution also the preferred indoors locations and food preferences of the ants listed below may vary to some degree since there is a lot of species specific variability among ants.
They prefer warm regions.
Large swarms of winged ants set out to start new colonies sometimes right in the voids of your walls.
Ants could enter your home from many different areas so be sure to check around window cracks door entryways lighting fixtures and other possible entrances.
They can look quite similar to each other.
Below is a list of common ants that may nest in walls with some tips on how to identify them.
Ants come into your home for two main reasons.
The use of poisons for black ants.
These ants actively excavate wood.
I would defiantly take a closer look at these ants.