How to Fix a Sagging Gutter: Rehang and Realign in 30 Minutes (2026)

Frequently Asked Questions

Why do gutters sag in the middle?

Several causes: (1) Failed gutter spikes (old nails) that have worked loose over years — the most common cause. (2) Too much distance between hangers — gutters need support every 24–36 inches. A long run with only end brackets will sag under the weight of water and leaves. (3) Fascia board rot — the wood backing has softened and won't hold fasteners. (4) Snow and ice load — heavy ice can permanently deform aluminum gutters. Address the cause before rehinging.

What is the difference between gutter spikes and gutter screws?

Gutter spikes are large 7-inch aluminum nails that drive through the gutter face, through a metal ferrule (tube) inside the gutter, and into the fascia. Over time, the spike backs out from freeze-thaw cycles. Gutter screws are 3-1/2 to 7-inch hex-head screws that go through the gutter and directly into the fascia with thread engagement. They don't back out. A gutter screw in the same hole as a loose spike immediately fixes the sag with no hole-repair needed.

What pitch should my gutters be at?

Gutters should slope 1/4 inch per 10 feet of run toward the downspout. For a 40-foot gutter run, the downspout end should be 1 inch lower than the far end. Too flat: water sits and mosquito breed, algae grows. Too steep: it looks visually wrong and water splashes. Check pitch by running water down the gutter and watching flow direction. You can also use a level against a string from the high end to the downspout.

How do I fix a gutter pulling away from the house at the fascia?

If the fascia is solid (no rot): add new gutter hangers (bracket-style hidden hangers are the best) every 24 inches using 3-inch wood screws into the fascia. If the old spike holes are stripped: offset slightly (1 inch up or down) to hit fresh wood. If the fascia is rotted: you must repair or replace the fascia before the gutter will hold. A rotted fascia will not grip any fastener.

When should I replace the whole gutter instead of repairing it?

Replace when: the gutter is cracked or has multiple holes (not just spikes), it has permanent bends or deformations from ice damage, the seams are split on a sectional gutter, or if the whole run has pulled away and has visible sag from water weight. Seamless aluminum gutters are the most cost-effective replacement — $6–$12 per linear foot installed. Patching a gutter that has multiple problems costs more over 3 years than replacement.

A sagging gutter that isn’t draining is one rainstorm away from foundation damage. Here’s how to fix it.

Diagnose the problem first

Look from below: Does the gutter sag in the middle? Does it pull away from the fascia at the top? Are the spike holes visibly wallowed out?

Check the fascia: Press your thumb against the fascia board behind the gutter. Soft = rot. Solid = you can proceed with fastener replacement.

Check the pitch: Does water pool after rain? If the gutter is pitched the wrong direction or dead-level, it won’t drain.

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Fix 1: Replace gutter spikes with gutter screws

The most common repair — takes 5 minutes per spike.

What you need:

• Gutter screws (3-1/2 to 7 inch) — buy a box, they’re cheap
• Drill with a hex bit
• Ladder

Steps:

1. Set up your ladder adjacent to the sagging section.
2. Locate each old spike hole along the sagging run.
3. Insert a gutter screw into the same hole. Drive it through the gutter face and ferrule (the metal tube inside), into the fascia board.
4. Drive until the gutter is pulled up snug to the fascia. Don’t over-drive — you’ll dimple the gutter face.
5. Move to the next spike, working along the run.

Tip: If the existing hole is too wallowed for the screw to grip: move 1 inch up or down to fresh wood.

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Fix 2: Add gutter hangers (for sections without enough support)

Sections more than 36 inches between fasteners need additional support. Hidden gutter hangers are cleaner-looking than spikes.

What you need:

• Hidden gutter hangers
• 3-inch wood screws (or 3-1/2-inch gutter screws)

Steps:

1. Slide the inner part of the hanger inside the gutter, hooking the back of the gutter.
2. Position the front of the hanger at the gutter lip.
3. Drive a screw through the front tab, through the gutter, and into the fascia.

Space new hangers 24 inches apart throughout the run. K-style and half-round gutters use different hanger styles — match to your gutter profile.

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Fix 3: Re-pitch a level or reverse-pitched gutter

Identify the low points by observing where water pools after rain, or run a hose in the gutter and watch the flow.

1. Drive a small finish nail into the fascia at the high end of the run (at the correct height).
2. Drive another nail at the downspout end — 1/4 inch lower per 10 feet of run.
3. Stretch a string between the two nails — this is your pitch line.
4. Loosen all fasteners along the run (remove spikes or back out screws slightly).
5. Reposition the gutter to match the string line.
6. Re-drive or replace fasteners with the gutter held at the new pitch.

This is easiest with two people — one to hold the gutter position, one to drive fasteners.

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Fix 4: Repair rotted fascia before rehanging

If the fascia is soft, fasteners won’t hold. Options:

• Small soft spots: Apply wood hardener to stabilize the softened wood. Let cure fully, then re-drive fasteners.
• Large sections of rot: Replace the affected fascia boards. Pry off the drip edge and gutter, cut out the rotted fascia, sister in new lumber, reinstall.

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Related guides

• How to Clean Gutters — clean before inspecting and repairing
• Gutter Replacement Cost — when repair turns into full replacement
• Gutter Guard Cost — reduce cleaning frequency after fixing the gutter
• How to Repair a Deck — fix the fascia/ledger while you’re up there