So, let’s look at the aim of gutters.
The aim of rain gutters is to collect water coming from the roof and channel it to the downpipes that carry the rainwater away for your buildings. (With water shortages and frequent droughts in South Africa, many home and business owners these days also direct rainwater to water storage tanks.)
Gutters divert water away from buildings to:

• Protect the foundation of your home or industrial building.
• Protect sidings, windows and doors.
• Prevent soil erosion.
• Protect your garden and landscaping.
• Prevent flooding in basements.
• Stop the growth of mould and mildew.
• Prevent staining of exterior walls.
• Minimise damage to the paint.
• Stop dry rot on fascia boards and roofs.