Gutter screws are the threaded fasteners that hold a gutter system to the house, and the right one depends on three things: the job (hanging the trough, joining sections, or securing a downspout), the fascia behind it, and the metal your gutter is made of. Most residential installs use two families of screw. Hex-head hanger screws (usually #10 to #14, 1-1/2 to 2-1/2 inches long) carry the load into the fascia or rafter tail, and short self-tapping zip screws (#8 x 1/2 inch) lock the light connections. Get the length and the metal wrong and the gutter either pulls loose or corrodes at every fastener.
What screws do gutter installers actually use?
Professional installers use hex-head gutter screws for hidden hangers and self-tapping zip screws for connections. The hanger screw is the structural fastener that takes the weight of a water-filled gutter, so it is longer and thicker. The zip screw is a short, self-piercing sheet metal screw that stitches sections, seams, elbows, and downspout bands together. A single job uses both, in different places.
| Screw type | Typical size | Head/drive | Job it does |
|---|---|---|---|
| Hidden hanger screw | #10-#14, 1-1/2″ to 2-1/2″ | Hex (1/4″) or Phillips | Hangs the gutter into fascia or rafter tail |
| Zip / sheet metal screw | #8 x 3/8″ or 1/2″ | Hex (1/4″), self-piercing | Joins sections, elbows, and outlets |
| Downspout band screw | #8 x 1/2″ | Hex, self-tapping | Fixes downspout brackets to the wall |
| Ferrule / spike replacement screw | #12-#14, 7″ to 8″ | Hex | Reuses the ferrule but replaces the old spike |
The old spike-and-ferrule system used a plain 7 inch aluminum nail, not a screw. That is the fastener most people are replacing when they search for gutter screws, because spikes back out. Threaded screws hold their position because the threads bite into wood fiber instead of relying on friction.
Gutter screw sizes: what length for your fascia
Screw length is set by the fascia behind the gutter, not by the gutter itself. A hidden hanger screw needs to pass through the hanger, through the fascia board, and bite at least 1 inch of solid wood. Standard 1x (3/4 inch) fascia takes a 1-1/2 inch screw. Aluminum-wrapped or doubled fascia takes 2 inches. To reach the rafter tail behind the fascia, step up to 2-1/2 inches.
| Fascia / target | Screw length | Why |
|---|---|---|
| Standard 1x wood fascia | 1-1/2″ | Passes the 3/4″ board and bites ~3/4″ of framing behind it |
| Aluminum-wrapped fascia | 2″ | The wrap and sealant add depth before the wood starts |
| Doubled or 2x fascia / rafter tail | 2-1/2″ | Reaches the solid rafter tail for the strongest hold |
| Composite or PVC fascia | 2″ minimum, into framing | Plastic fascia has no holding power; the screw must reach wood |
| Section-to-section / elbows | 3/8″ to 1/2″ | Short zip screw, must not protrude enough to snag debris |
Retail packs sell gutter screws in 1/2, 1-1/4, 1-1/2, 2, and 3-1/2 inch lengths. The 1-1/4 inch size is common on hanger packs, but it is too short for wrapped fascia, which is where a lot of sagging gutters trace back to. When in doubt, go longer and hit framing. A screw that only grips the fascia face pulls out the same way a spike does once the gutter fills with water and ice.
Are gutter screws better than spikes or nails?
Yes. Threaded gutter screws driven into hidden hangers outlast spikes and nails by roughly three to five times. Spikes rely on friction and back out as the fascia expands and contracts through freeze-thaw cycles, so spiked gutters commonly loosen in 5 to 10 years. Screw-mounted hidden hangers routinely last the life of the gutter, often 20 years or more, because the thread mechanically locks into the wood.
| Fastener | How it holds | Typical service life | Failure mode |
|---|---|---|---|
| Spike and ferrule | Friction of a smooth shank | 5-10 years | Backs out, gutter sags and pulls away |
| Screw and hidden hanger | Threads locked in wood | 20+ years | Rarely fails unless fascia rots |
| Nail (roof-nailed strap) | Friction plus roof penetration | Varies, risks roof leak | Loosens; nail hole under shingles can leak |
There is a mechanical reason beyond thread grip. A hidden hanger screw enters at a slight downward angle into the rafter or fascia, so when debris and water load the front lip, the force pushes the screw into the wood rather than levering it out. A horizontal spike gets pried straight out by the same load.
Screw material: match the metal to your gutter
Match the screw metal to the gutter metal, or the fastener becomes the first thing to corrode. When two dissimilar metals touch in the presence of water, galvanic corrosion attacks the less noble one. A bare or zinc-plated steel screw in an aluminum or copper gutter sits wet for years and eats a ring of corrosion around every hole. This is the detail most retailer listings and install guides skip, and it is why gutters leak at the fasteners first.
| Gutter metal | Use these screws | Avoid |
|---|---|---|
| Aluminum | Stainless (300 series) or coated aluminum-compatible screws | Bare steel, uncoated zinc |
| Copper | Copper, brass, or 316 stainless; copper rivets on seams | Steel, zinc, aluminum (all corrode fast against copper) |
| Galvanized steel | Zinc-plated, hot-dip galvanized, or stainless | Bare steel |
| Vinyl | Stainless or coated screws through the bracket | N/A, no galvanic issue with plastic |
Stainless 300-series screws are the safe default across aluminum, steel, and vinyl gutters because stainless sits far enough from those metals in the galvanic series to stay quiet. Copper is the exception. On a copper gutter, use copper or brass fasteners and copper rivets, because even standard stainless can drive slow corrosion of the copper over decades. For any exposed screw, a neoprene or EPDM bonded washer seals the hole and keeps water off the shank.
Where the screw goes: fascia, rafter tail, or downspout
A gutter system has three fastening points, and each takes a different screw. The hanger screw goes through the trough into the fascia or rafter tail. The zip screw joins the gutter to elbows and outlets. The band screw fixes the downspout to the wall. Driving the wrong one in the wrong place is the most common install error behind leaks and sags.
- Hidden hangers into the fascia. Space them every 18 to 24 inches, tightening to 36 inches only in mild climates. In snow country, tighten spacing to 16 to 18 inches so the load of ice does not overload any single screw.
- Rafter tails for maximum hold. Where you can find them (usually every 16 or 24 inches on center), driving the hanger screw into the rafter tail beats fascia-only holding power. This matters on heavy 6 inch or copper gutters.
- Zip screws at every joint. Two or three self-tapping screws lock each section seam, outlet, and elbow. Keep the screw short enough that its tip does not project into the water channel where it catches leaves.
- Downspout bands to the wall. Use a #8 x 1/2 inch self-tapping screw with the correct anchor for masonry. Two bands per single-story drop, three for two stories.
Zip screws for downspouts and elbows
Zip screws are short self-piercing sheet metal screws, typically #8 x 3/8 or 1/2 inch, used to fasten light gutter connections without a pilot hole. Their sharp point pierces aluminum or steel as you drive them, which is why they are the standard for joining downspout sections, elbows, and outlet tubes. The trade name comes from how fast they zip in with an impact driver on a 1/4 inch hex bit.
The one rule with zip screws on downspouts: install them so the sharp point faces where it does the least harm. Points that project into the downspout interior snag debris and start clogs, so many installers set downspout screws from the back or use pop rivets on the visible face for a cleaner, snag-free finish. On the gutter trough itself, keep zip screws above the water line.
Common gutter screw mistakes
Most gutter screw failures come from four avoidable errors. Each one traces back to length, metal, or placement, the same three variables that decide every fastener choice on the system.
- Screw too short for wrapped fascia. A 1-1/4 inch screw grips only the aluminum wrap and a sliver of wood; it lets go under a full gutter. Wrapped fascia needs 2 inches.
- Bare steel screws in aluminum or copper. Galvanic corrosion rings appear within a season or two and become the first leak points. Match the metal.
- Reusing old spike holes. The wallowed-out hole gives a new screw nothing to bite. Drill a fresh hole an inch to the side, into solid wood or a rafter tail.
- Overdriving into thin aluminum. Cranking a screw past snug strips the hole in soft aluminum or splits a hanger. Set the driver clutch and stop at contact.
For the full hanger picture, including which hanger style pairs with each screw and how spacing changes by climate, see our guide to gutter clips and hangers. If you are running a new system from scratch, the rain gutter installation guide covers pitch and hanger layout, and how fascia and gutters connect explains why the board behind the screw decides everything. To see where every fastener sits in the system, the gutter parts diagram names each component, and our learn hub collects the rest of the gutter series.
Frequently asked questions
What screws do you use for gutters?
Use two types. Hex-head hidden hanger screws, usually #10 to #14 and 1-1/2 to 2-1/2 inches long, hang the gutter into the fascia or rafter tail. Short self-tapping zip screws, around #8 x 1/2 inch, join sections, elbows, and downspout bands. Choose stainless as a safe default, or match the screw metal to a copper gutter.
What size screws for gutter hangers?
Size the screw to the fascia. Standard 3/4 inch wood fascia takes a 1-1/2 inch hanger screw. Aluminum-wrapped or doubled fascia needs 2 inches. To reach the rafter tail behind the fascia, use 2-1/2 inches. The screw should bite at least 1 inch of solid wood, so a 1-1/4 inch screw is often too short on wrapped fascia.
Are gutter screws better than spikes?
Yes. Threaded screws in hidden hangers hold three to five times longer than spikes. Spikes rely on friction and back out through freeze-thaw cycles, failing in about 5 to 10 years. Screw-and-hanger systems commonly last 20 years or more because the thread locks into the wood and the angled entry pushes the screw in under load rather than prying it out.
Can you use regular screws for gutters?
In some cases, but match the metal and the length. A plain steel deck screw in an aluminum or copper gutter causes galvanic corrosion at every hole within a season or two. Stainless 300-series screws are a safe substitute across aluminum, steel, and vinyl gutters. On copper gutters, use only copper, brass, or copper rivets to avoid corroding the copper.
What are zip screws for gutters?
Zip screws are short self-piercing sheet metal screws, typically #8 x 3/8 or 1/2 inch, that fasten light gutter connections without a pilot hole. Their sharp point pierces aluminum or steel as you drive them, which makes them the standard for joining downspout sections, elbows, and outlets. Keep the tip from projecting into the water channel where it can snag debris.
Do gutter screws go into the fascia or the rafter?
Either works, but the rafter tail holds better. A hidden hanger screw into 3/4 inch fascia holds well for standard 5 inch aluminum gutters. For heavy 6 inch or copper gutters, or in snow country, drive the screw into the rafter tail behind the fascia, usually spaced every 16 or 24 inches, for the strongest hold.
Reviewed by The Roofing Brief Team. Last reviewed July 2026.