When ants do this to your attic structures it could significantly compromise its stability and your roof could cave in any time.
Ant colony in attic.
Some ants are more attracted to sweets and some to fats and oils.
I would defiantly take a closer look at these ants.
Light brown these ants are between 1 12 and 1 8 inch long.
A single ant colony could have as many as 50 000 individuals.
Baits have the added advantage of being easy to place and relatively mess free.
Use these scouts to wipe out the entire colony.
A mature carpenter ant colony can have 10 000 ants so random spraying will be ineffective.
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.
Prebait ants in areas you ve previously seen them.
While it would be unusual to have an entire colony in your attic it is not unheard of.
Another important situation that favors ant activity in walls and other voids is the opportunity to gain entrance inside the home or other structures through cracks gaps and openings that lead directly inside.
Significant ant colony in an attic.
The ones you see are scout ants foraging for food to take back to the colony.
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What you must do is find the nest and eliminate it.
Ants will build nests where ever they can find a suitable area to do so.
Ants become dwellers inside walls and other voids simply as the result of finding a more preferred site for food moisture and protection than what is available to them outdoors.
It is important to check insect traps regularly and refresh them periodically to ensure they continue to be effective.
For permanent control you need to get rid of the whole colony.
First and foremost don t spray any further as an initial step.
Carpenter ants have built a reputation for shaving through wood making holes and tunnels that damage it.
These ants are about 1 8 inch long and range from pale brown to black in color.
All types of ants live in colonies that consist of hundreds or even millions of individual ants with one or more egg laying queens.
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.
You ll kill it but for every ant you see there may be hundreds more hiding in the house.
When you see an ant your first impulse is probably to step on it.
Ants could damage your attic in as few as six months.
They are brown or black and about half an inch long.
These ants actively excavate wood.
They prefer warm regions.
Beyond that only 10 15 of the colony is foraging at one time.
Below is a list of common ants that may nest in walls with some tips on how to identify them.