What this usually looks like
Extension lying on the ground
The downspout extension is detached or partly detached, but the wall-mounted downspout above it still looks straight.
Start here: Start with the lower connection and check for a loose slip joint, missing screws, or a connector that got stretched open.
Bottom elbow twisted sideways
The elbow at the bottom of the downspout is rotated, flattened, or pulled away from the vertical section.
Start here: Check the elbow shape and the screw holes before trying to force the extension back on.
Whole lower downspout is loose
The extension is down, and the vertical downspout or straps on the wall are also pulled loose.
Start here: Check wall straps and fastener holes first, because a loose upper section will keep pulling the lower pieces apart.
Water now pools near the house
After the animal damage, rainwater spills right at the foundation or washes out mulch and soil.
Start here: Confirm the extension path is open and still carries water away, not just reattached at the downspout.
Most likely causes
1. The downspout extension simply pulled out of a loose lower joint
Raccoons often grab or step on the extension near the ground. If the pieces are not bent, they can pop apart without much visible damage.
Quick check: Dry-fit the extension back onto the outlet. If it slides on squarely and sits snug, the joint likely just came loose.
2. The downspout elbow or connector was twisted out of shape
If the extension was yanked sideways, the thin metal or plastic at the transition point usually deforms before the whole downspout fails.
Quick check: Look for flattened corners, split seams, or an opening that is no longer rectangular and even.
3. A wall strap or lower support loosened, letting the assembly move
When the vertical section can flex, the animal has more leverage and the lower extension keeps dropping back off.
Quick check: Push gently on the vertical downspout. It should not sway much or pull away from the wall.
4. The extension was already clogged or poorly aligned and came apart easily
A heavy, debris-filled extension or one that was already cocked at an angle takes very little extra force to disconnect.
Quick check: Check for packed leaves, mud, or a buried outlet that backs water up into the extension.
Step-by-step fix
Step 1: Make the area safe and find the exact loose point
You want to know whether this is just a dropped extension or damage that traveled up into the downspout on the wall.
- Wait until the area is dry enough to work without slipping.
- Pick up the extension and set it next to the downspout outlet in the same orientation it was installed.
- Look for the first point where pieces separated: extension to connector, extension to elbow, or elbow to vertical downspout.
- Check the ground for loose screws, a strap, or a connector piece that may have fallen off with it.
- If the extension is attached to a buried line, make sure the buried inlet itself was not pulled loose or cracked at grade.
Next move: If you can clearly see one clean separation point and the surrounding pieces still look square, you can move on to reattachment checks. If several joints are loose, or the wall-mounted downspout is also pulled away, treat it as a larger alignment problem instead of forcing the bottom back together.
What to conclude: A single clean disconnect usually means a simple reattach or one small replacement part. Multiple loose points usually mean the assembly shifted and needs support corrected first.
Stop if:- The ladder footing is unstable or the ground is muddy and slick.
- The downspout pulled siding, trim, or masonry loose with it.
- You find a wasp nest, animal nest, or active animal activity in the downspout area.
Step 2: Check whether the pieces still fit square without force
A downspout extension that still fits square can often be reused. Bent pieces almost always leak, fall off again, or hold debris.
- Dry-fit the extension onto the outlet or elbow without screws first.
- Check whether the opening slides on evenly and sits straight instead of rocking side to side.
- Inspect corners and seams for splits, crushed edges, or screw holes torn into slots.
- Look down the extension for obvious flattening that would slow water flow.
- Common wrong move: do not squeeze a badly bent opening closed with pliers and call it fixed. It usually pops loose in the next hard rain.
Next move: If the extension fits snugly and lines up naturally, you may only need to secure it properly. If the opening is misshapen, split, or only fits when twisted, replace the damaged piece instead of fighting it.
What to conclude: Good fit with no force points to a loose connection. Poor fit points to a bent downspout elbow, connector, or extension end.
Step 3: Check support and alignment on the wall-mounted downspout
If the upper downspout can move, the lower extension will keep working loose no matter how well you fasten the bottom.
- Push lightly on the vertical downspout and watch for movement at the straps.
- Check whether the lower end of the vertical section still points straight down where the elbow should attach.
- Look for pulled-out screws, enlarged fastener holes, or a strap bent open from the animal pulling on it.
- If a strap is loose but the downspout itself is not crushed, tighten or replace the strap before reconnecting the extension.
- Make sure the lower outlet is not aimed sideways toward the wall or twisted away from the extension path.
Next move: If the vertical section is solid and aligned, you can finish the repair at the lower connection. If the wall section is loose or twisted, secure that first or the extension repair will not last.
Step 4: Reattach the extension or replace the damaged lower piece
Once the fit and support are confirmed, this is where you make the repair hold through the next storm instead of just snapping it back together.
- If the original extension and outlet fit squarely, reconnect them fully so the overlap is solid and the extension points away from the house.
- If the connector between the downspout and extension is split or stretched, replace the downspout connector.
- If the bottom elbow is bent or flattened, replace the downspout elbow rather than trying to reshape it.
- If the extension body is cracked, crushed, or no longer stays attached, replace the downspout extension.
- Use appropriate exterior fasteners only where the original joint was meant to be mechanically secured, and keep the pieces aligned so water can flow downhill without catching on a lip.
Next move: If the pieces seat fully, stay aligned, and do not sag when you let go, the repair is likely sound. If the extension still wants to twist off or sit crooked, go back and correct the upper alignment or replace the next damaged piece in the chain.
Step 5: Test it with water and finish the drainage path
A downspout repair is not done until you know water actually leaves the house area cleanly and the extension stays put under flow.
- Run water from a hose into the gutter or top of the downspout if you can do it safely, or wait for a moderate rain and watch the lower connection.
- Check for drips at the elbow, connector, and extension joint.
- Confirm water exits where it should and does not back up, spill at the house, or leak from a crushed section.
- Watch whether the extension shifts, lifts, or separates once water starts moving through it.
- If the extension is attached to a buried line and water backs up, the animal damage may have exposed a clog problem that needs separate troubleshooting.
A good result: If water runs through cleanly and the extension stays in place, the repair is finished.
If not: If water leaks from the joint or backs up, replace the remaining damaged lower part or troubleshoot the buried outlet for a clog.
What to conclude: A clean flow test confirms both the repair and the drainage path. Leakage or backup means there is still a fit problem or a downstream blockage.
Replacement Parts
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FAQ
Can I just snap the downspout extension back on?
Yes, if the pieces still fit squarely and the upper downspout is solid. If the elbow, connector, or extension end is bent, it will usually leak or fall off again unless you replace the damaged piece.
How do I know whether the elbow or the extension is the bad part?
Dry-fit them without force. If the elbow opening is flattened or twisted, replace the elbow. If the elbow looks true but the extension end is split, crushed, or loose on every try, replace the extension.
Should I seal the joint with caulk or tape?
Not as the main fix. A downspout extension joint needs proper shape, overlap, and support first. Sealant on a bent or loose joint usually fails once water and movement hit it.
What if the extension is attached to a buried drain and now water backs up?
That usually means the animal damage exposed a separate clog or outlet problem. If the lower connection is repaired but water still backs up, troubleshoot the buried downspout or outlet next.
Do I need to replace the whole downspout?
Usually not. Most raccoon damage stays at the lower extension, connector, elbow, or strap. Replace the whole wall-mounted section only if it is kinked, badly crushed, or no longer mounts securely.
Why does the extension keep falling off after I reattach it?
The usual reasons are a bent mating piece, a loose wall strap letting the downspout move, or a clogged extension adding weight and backpressure. Fix the alignment and support problem, then test with water.