Commercial or industrial gutters should be checked regularly, typically after any heavy storm or downpour of rain, to make sure they are free from any debris, as this is so important to maintain a fully functioning guttering system. It is not uncommon for gutters to get blocked with leaves and other debris, especially in the Autumn and Winter months, and dealing with a problem before it causes damage to your guttering system is so important.
With the increased rainfall and frequent heavy showers that we have become more accustomed to in recent years it has highlighted the fact that many buildings simply do not have gutters adequate enough to cope with the water volumes we are experiencing. If your gutters are inadequate you could experience water backfilling and entering the building this way.