Ant's, what really kill's them.

[Manbatius]

Bait stations for inside.
Boiling water for outside.

This. We get them real bad here. Each ant hill gets boiling water with washing up liquid. You will have to do this to each ant hill/mound.
I started near the house and worked a section at a time last year.

If they make it inside (like last week) bait station sorts them.
Interestingly mine appeared after pressure washing the patio.

 

[marinersfan]

I've heard that if you're getting them inside you can interrupt their pheromone trail by spreading talc around. Looks for spots they could get in and put some around them.

 

[bainbridge]

+1 for Nippon bait stations.

Boiling water is fine on gaps in paving etc but it kills soil for years if you pour it on grass. We had 2 nests in the front garden and while a few kettles full of boiling water did kill admittedly kill the nests, there were still bald patches on the lawn 2 years later. Nothing would grow in the soil until I dug out a shovel depth of the bad soil and replaced it.

 

[MassiveJim]

We had ants nesting in the walls, we suspect 3 or 4 separate colonies.
I tried and powder and it worked but a few weeks later they came back.

Ended up paying a guy about £300 to drill holes in the wall and put treatment in there.

With the good weather coming around soon I guess we'll find out if it worked out not

 

[something daft already!!]

Napalm usually does the trick. It smells nice too.

 

[~Divine~Wind~]

We had really good results from the Nippon bait station hockey puck things in the last house.

they did ceom back a couple of years later and I grabbed another brand (cant remember which) that didnt seem anywhere near as effective

 

[Werewolf]

Nippon ant bait stations are the ones I go to for 100% success.

Bit pricey but its the most effective and easiest solution.

Basically ants will eat their dead, so you need to poison the nest. Once you have a strong poison in there its just a chain reaction.

That's what we've used in the past, the trick is to get the bait stations in the right place, and preferably before it hits flying ant season.

We've never worked out how, but one year the dining room was full of flying ants for about a week, no sign of ants in the kitchen, nothing in the dining room for them to be attracted to, no open vents or anything, just them appearing.

These days we tend to put down a few bait stations outside the dining room under bricks/ceramic plant pots etc (so only ants can get to them, and they're protected from the rain.

 

[Itc]

Napalm usually does the trick. It smells nice too.

Especially in the morning