Gutters are light metal held to the house with hangers and joined with sealant, and all three fail over time. A gutter that sags, drips at a corner or pulls away from the fascia is no longer carrying water away from the house, and the damage shows up as rotten fascia, stained siding and a damp foundation.
This guide covers the common gutter failures, what causes them, what you can see from the ground, and how a technician repairs them. It also helps you tell a repair from a replacement, and a gutter problem from a roof problem. Nothing here involves a ladder.
What you notice
- A gutter section that sags, dips or looks lower in the middle than at the ends.
- Dripping or a steady stream from a corner, a seam or an end cap during rain.
- A gutter that has pulled away from the house so you can see a gap behind it.
- Water running down the siding behind the gutter, or stains and peeling paint on the fascia.
- A downspout that has come apart at a joint, is crushed, or is no longer attached to the wall.
- Overflow in rain even though the gutters were recently cleaned.
- Rust spots, holes or bent sections on older steel or aluminum gutters.
- Nails or screws backing out of the fascia along the gutter line.
Likely causes
Failed hangers
Spikes and ferrules on older gutters work loose from the fascia as wood swells and shrinks. The gutter sags, water pools, and the weight pulls the next spike out. Hidden hangers with screws are the usual fix.
Rotten fascia
If the board the gutter is screwed to has rotted, usually from years of overflow, no hanger will hold. The fascia has to be replaced before the gutter can be rehung.
Dried or cracked seam sealant
Sectional gutters are joined and sealed at every corner, seam and end cap. Sealant dries out and cracks in sun and frost, and the joint drips. Seamless gutters have fewer joints but still have corners and outlets.
Wrong slope
Gutters need a slight fall toward the downspout. Settled hangers or a poorly installed run leave water standing, which adds weight, breeds mosquitoes and freezes in winter.
Ice and snow
Ice weighs a lot, and sliding snow off a metal or steep roof can tear gutters off entirely. Damage that appears after winter usually falls here.
Ladders and impact
A ladder leaned on the gutter dents it or bends the front edge. Falling limbs crush sections. Both leave a low spot where water overflows.
Undersized or missing downspouts
A long gutter run with one small downspout overflows in heavy rain no matter how clean it is. Adding a downspout or upsizing the outlet is a repair, not a cleaning.
Safe things to check before anyone comes out
- Watch during rain and note exactly where water drips, pours or overflows. A drip at a corner is a seam; overflow in the middle of a run is sag or slope; overflow at the end is a clogged or undersized downspout.
- Sight along each gutter from the end of the house. The run should look straight with a barely noticeable fall toward the downspout.
- Look for a gap between the back of the gutter and the fascia, and for hanger spikes sticking out.
- Look at the fascia board and the soffit behind the gutter for dark stains, peeling paint, soft or crumbling wood, or a gutter screw hole with nothing solid around it.
- Check each downspout from top to bottom for separated joints, crushed sections and whether the bottom directs water away from the foundation.
- Note the gutter type if you can tell: sectional with visible seams every several feet, or seamless with joints only at corners.
When to stop and call
- A ceiling inside is sagging or holding water, or water is near electrical equipment. Keep people out of that room; that is a roof leak and needs a roofer.
- A gutter or downspout is hanging loose over a walkway, a door or a parked car. It can come down in the next wind.
- Water is running into the basement or crawl space, or pooling against the foundation in every rain.
- The fascia or soffit is visibly rotten or birds and squirrels are getting in behind it. The opening leads to the attic.
- Ice has torn a section off and the roof edge is exposed before more snow arrives.
What the technician does
- Inspects the full gutter system from a ladder or the roof edge: hangers, seams, slope, downspouts, outlets and the fascia behind.
- Rehangs sagging sections with new hidden hangers screwed into solid wood, and resets the slope toward the downspouts.
- Cleans and reseals leaking seams, corners and end caps with gutter sealant, or replaces a corner that cannot be sealed.
- Replaces crushed or rusted sections, reconnects or replaces downspouts, and adds extensions at the bottom.
- Replaces rotten fascia where needed, which is carpentry priced separately from the gutter work.
- Tells you honestly when a gutter is past repair, for example widespread rust, many failed seams, or a run that has been patched before, and quotes a replacement so you can compare.
What it usually costs
Small repairs such as resealing seams, rehanging a sagging section or reattaching a downspout are usually in the low to mid hundreds of dollars for a visit. Replacing sections, adding a downspout or repairing fascia costs more and depends on footage and height. When the whole system is tired, replacement is often priced per foot and quoted alongside the repair. The estimate should separate gutter work from any carpentry before anything starts.
What moves the estimate
- What failed: a seam, a hanger, a section, or the fascia behind it.
- Height and access. Two-story work takes more setup and time.
- Sectional versus seamless gutters, and the material (aluminum, steel, copper).
- Fascia or soffit carpentry.
- Repair versus replacing the run or the whole system.
Keeping it from coming back
- Keep gutters clean so they are never carrying the weight of wet debris, which is what pulls hangers out.
- Never lean a ladder on the gutter. Use a stand-off or ask whoever is working at height to do the same.
- Have the hangers and seams checked when the gutters are cleaned; a loose spike is a minute to fix early.
- Keep downspout extensions in place and directed away from the foundation.
- In snow country, ask about snow guards on metal roofs and about gutter placement below the roof line so sliding snow clears the gutter.
Questions people ask
Repair or replace?
One or two failed seams or a sagging section: repair. Rust holes in several places, seams that have been resealed before, or hangers pulling out along a whole run: replacement is usually the better value, especially with seamless aluminum.
Is the gutter leaking or the roof?
Water dripping from the gutter itself, at a seam or a corner, is the gutter. Water running down the siding behind the gutter, or coming in at the top of an inside wall, may be the roof edge or an ice dam. A technician looking at the fascia from above can tell.
Why is my fascia rotten?
Years of overflow from clogged or sagging gutters soaking the board. The gutter repair will not hold until the fascia is replaced, and the cause of the overflow has to be fixed too.
Do I need bigger gutters?
If a clean gutter with a clear downspout still overflows in normal heavy rain, the run is undersized for the roof area or has too few downspouts. Adding a downspout is often cheaper than replacing the gutter.
Sources
- NC State Extension: Moisture control and prevention, gutter management content.ces.ncsu.edu
- University of Minnesota Extension: Moisture in basements, causes and solutions extension.umn.edu
- U.S. EPA: A brief guide to mold, moisture and your home www.epa.gov