Step-by-step fix
Step 1: Set up the area and check the strap size
- Choose a dry time to work so the wall and ground are not slippery.
- Put on gloves and move anything away from the base of the downspout.
- Look at the existing downspout shape and width so you can confirm the replacement strap matches.
- If the strap is high, place a step ladder on firm, level ground and keep your hips between the rails while working.
If it works: You can reach the strap safely and you have a replacement that matches the downspout.
If it doesn’t: Pause and get the correct strap size or a safer way to reach the work area before continuing.
Stop if:- The ladder feels unstable or the ground is uneven.
- The replacement strap does not match the downspout size or attachment style.
- The wall surface around the strap looks cracked, rotten, or loose.
Step 2: Support the downspout before removing the old strap
- Hold the downspout with one hand and gently check how much it moves.
- If needed, ask someone to steady the downspout while you remove the old strap.
- Make note of the strap location so the new one goes back at the same height unless the old spot is damaged.
If it works: The downspout is supported and will not swing away from the wall when the old strap comes off.
If it doesn’t: Add temporary support by holding the downspout in place or stop until you have help.
Stop if:- The downspout is already detached at a joint.
- The downspout shifts heavily or pulls away from the wall when touched.
- More than one support point is missing or failed.
Step 3: Remove the damaged strap and old fasteners
- Use a drill or screwdriver to back out the screws holding the old strap.
- If the strap is bent around the downspout, open it carefully and pull it free.
- Remove loose anchors or broken fastener pieces if they come out cleanly.
- Keep the old strap nearby to compare length and bend shape with the new one.
If it works: The old strap is off and the mounting area is clear enough for the new strap.
If it doesn’t: If a fastener is stuck, apply steady pressure and avoid stripping it further.
Stop if:- A screw spins without releasing and the wall material starts breaking apart.
- Removing the strap exposes major rot, crumbling masonry, or a large hole.
- The downspout drops or separates when the strap is removed.
Step 4: Position the new strap around the downspout
- Hold the downspout so it sits straight against the wall and lines up with the sections above and below.
- Wrap or place the new strap around the downspout in the same general position as the old one.
- Leave the strap snug enough to support the downspout without crushing or deforming the metal.
- If the old hole is damaged, shift slightly to solid material nearby while keeping the downspout aligned.
If it works: The new strap fits around the downspout and the downspout sits straight against the wall.
If it doesn’t: Recheck the strap size and adjust the position before fastening it fully.
Stop if:- The strap pinches the downspout out of shape.
- The only available mounting area feels weak or breaks apart under light pressure.
- The downspout cannot be aligned because other sections are bent or disconnected.
Step 5: Fasten the new strap securely
- Drive the fastener through the strap into solid wall material or into the proper anchor for the surface.
- Tighten the strap until the downspout is secure but not crushed.
- If the strap uses two fastening points, install both so the support is even.
- Give the downspout a light shake to confirm the strap holds it close to the wall.
If it works: The strap is tight, the downspout is supported, and the wall connection feels solid.
If it doesn’t: Remove and reposition the fastener into sound material or use the correct anchor for the wall type.
Stop if:- The fastener will not tighten and keeps pulling out.
- The wall surface cracks or crumbles while tightening.
- The downspout still moves excessively after the strap is installed.
Step 6: Check drainage alignment and finish up
- Look up and down the downspout to make sure the sections remain connected and reasonably straight.
- If possible, run a small amount of water from a hose into the gutter or upper downspout and watch for leaks or shifting.
- Clear away old hardware and confirm the bottom of the downspout still directs water where you want it.
- Plan to add or replace other straps if the downspout has multiple loose points.
If it works: The downspout stays in place during a light water test and the new strap holds without movement.
If it doesn’t: Tighten the strap slightly, correct the alignment, or inspect for other failed supports.
Stop if:- Water leaks heavily from a joint above or below the strap.
- The downspout pulls away at another location during the test.
- You find multiple damaged sections that need broader repair.
Replacement Parts
Repair Riot may earn a commission from qualifying purchases, at no extra cost to you.
FAQ
How do I know if a downspout strap needs replacement?
Replace it if it is missing, rusted through, bent so badly it no longer holds the downspout, or loose enough that the downspout rattles or pulls away from the wall.
Can I reuse the old screw holes?
You can if the material is still solid and the fastener tightens securely. If the hole is stripped or damaged, move to nearby solid material or use the proper anchor for the wall surface.
How tight should the new strap be?
Tight enough to keep the downspout from moving around, but not so tight that it dents or crushes the downspout.
What if the downspout still feels loose after replacing one strap?
Check for other missing or failed straps, loose joints, or bent sections. One new strap will not fix a downspout that has multiple support or alignment problems.
Do I need a special strap for every downspout?
Not every one, but the strap should match the downspout size and the way it attaches. Compare the shape, width, and mounting style before ordering.