And have them check it all out again.
I fear you are not the networker or IT staff here. Breaks to me are where the wire is broken. Exploitation is what some companies did to their workers.
Get with your installer and have them work the issues.
If you fixed it with replacing switches, were these consumer grade products? If so, try business or carrier grade gear next time.
Can i know the causes of link breaks between different buildings of a small enterprise installation?
The topology of the network is:
-building 1 connected to building 2 using a Wifi Bridge.
-building 2 connected to building 3 using a wired connection.
-building 2 connected to building 4 using a wired connection.
-building 4 connected to building 5 using a wired connection.
the link breaks were mainly on the link Building 2 / Building 4 / Building 2, Building 2 / Building 1.
When we replaced the switch located at the entrance of Building 5, the problem was solved.
After few days, the problem was occured again.
These results were found:
- a break (1 ping) from Building 3 to Building 2.
- followed by a prolonged break (4 or 5 pings) from Building 2 to Building 1.
- then a break (1 ping) from Building 2 to Building 5.
We have inserted a new switch between the antenna start (WiFi bridge) and the Building 2 switch. This improves the situation (a maximum ping from Building 2 to Building 1 in case of break link).
Exploitation is not unduly disrupted, but the underlying problem is not resolved.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic