Do gutter guards lower the risk of water damage?
Short answer. Yes, for damage that starts with clogged gutters. By keeping the trough and downspouts clear, guards reduce overflow that rots fascia and soffits, saturates soil at the foundation, leaks into basements and crawl spaces, and erodes landscaping. They do nothing for roof leaks, missing drip edge, undersized gutters, or downspouts that dump water against the house.
Damage guards help prevent
- Fascia and soffit rot: clogged gutters spill over the back edge, soaking the wood behind the gutter.
- Deck edge rot: water backing up in a full gutter can wick under the first course of shingles.
- Foundation and basement water: overflow lands right at the foundation, and Georgia clay drains slowly, holding that water against basement walls.
- Erosion and splash: overflow carves trenches in beds and splashes mud onto siding.
- Gutter failure: heavy wet debris pulls hangers loose, and a falling gutter can damage more on the way down.
Damage guards do not prevent
- Roof leaks at flashing, vents, valleys or worn shingles.
- Water running behind gutters because drip edge is missing.
- Overflow from gutters too small for the roof or with too few downspouts.
- Water from downspouts that discharge next to the foundation; extensions or underground drains handle that.
- Grading that slopes toward the house.
Getting the most from guards
Put guards on gutters that are sized, pitched and attached correctly, and make sure downspouts carry water several feet away from the house. Check the guards each spring for pollen film. If there are already stains on the fascia or soffit, fix the rot and its cause before adding guards, or you will hide the damage under new metal. See gutter sizing, seamless gutters and guards and common roof leak causes.