Roof edge drainage
Gutters are part of the roof system because uncontrolled water damages fascia, soffits, foundations, siding, and winter eaves. Illinois freeze-thaw makes small drainage errors expensive.
Common gutter failures
Sagging sections, loose hangers, leaking corners, undersized downspouts, crushed outlets, and bad pitch all push water where it should not go. Heavy leaves and winter ice add weight that can pull long runs away from the fascia.
The repair should include the reason the system failed. Re-sealing a corner is different from correcting pitch, replacing rotten fascia, or adding downspout capacity for a large roof plane.
When replacement is cleaner
Seamless aluminum replacement often makes sense when old sectional gutters leak at many joints, runs are twisted, hangers no longer hold, or the roof sheds more water than the system can carry.
Whole-home gutter work in Illinois commonly ranges from $1,400 to $3,700, while smaller repairs often land between $150 and $650. The final quote depends on height, access, fascia condition, and downspout routing.
Details that protect the roof
Drip edge, apron flashing, gutter height, outlet placement, splash blocks, and extensions all affect whether water backs against the roof edge or dumps beside the foundation.
Guards can help in heavy tree cover, but they are not a substitute for correct pitch and capacity. The contractor should recommend them only where the roof and tree pattern justify the cost.