Gutter Replacement in Fox Lake, IL: Fixing a “Frankenstein” Gutter System (and the Hidden Rot Underneath)

Project Story · Gutters

By Rhett Wilborn, Owner, Innovative Home Concepts · 21 years in McHenry & Lake County exteriors · Updated July 17, 2026

The landlord who owns this rental on South Lake Avenue in Fox Lake didn’t need a moisture meter to know the gutters were shot. You could see it from the driveway. Rust streaks. A downspout hanging half off the house. Corners pulling away from the fascia. He called us for a straight seamless gutter replacement, and that’s what he got. But this job is worth writing up because of what we found behind the gutters once they came down. If you own a home anywhere around the Chain O’ Lakes and you’ve been putting off your gutters, read this one first.

Fox Lake sits in Lake County, and a lot of the lake-area housing stock here has the same story: gutters replaced in pieces over the decades, a section here, a section there, never all at once and never quite right. That patchwork is exactly what was on this house.

After

The “Frankenstein” gutter system

Walk the perimeter of most homes and the gutters tell you their whole history. On this one, some runs were old steel, rusting and streaked and sagging. Other runs were newer aluminum with real hangers and flashing, clearly done in a different year by somebody else. Different materials, different eras, different quality, all on the same house. I call that a Frankenstein job. It’s stitched together from whatever got replaced whenever a section finally gave up.

The problem with a Frankenstein gutter system isn’t just looks. The weakest, oldest sections are quietly doing damage while everyone assumes the gutters are fine because part of them looks okay. Around the older lake neighborhoods we see this constantly, and it’s a big part of why older gutters fail around here.

Before

Before

Why do rusting steel and spike-and-ferrule hangers fail?

Steel gutters have their own failure mode. They rust. Once the coating is compromised you get pinholes, then streaks, then holes big enough to dump water down the wall instead of moving it to the downspout. InterNACHI’s home-inspection standards flag exactly this: gutters need to be free of rust, cracks and holes to do their one job. These were well past that point.

Before

Before

Here’s the part homeowners don’t see coming. When a steel gutter has no flashing behind it and it’s slowly failing, the water doesn’t just leak out the front. A lot of it runs behind the gutter, straight down the fascia board and into the soffit. Metal sitting against wet wood, season after season. That is a rot factory. After 21 years pulling old gutters off houses in these lake towns, I can tell you the damage you can see is almost never the whole story.

The hidden rot, and the honest change order

When our rep first looked at this house, he walked it and marked the spots he could tell from the ground were already rotted. That came to somewhere around 50 to 60 feet of visible rotted wood. Fascia, soffit, the usual suspects. He drew it up so the landlord could see exactly what we were looking at before anybody signed anything.

Before

But here’s the honest truth about wood rot, and I tell every homeowner the same thing. A lot of the time you can’t know what’s rotted until you take the gutters off and see the substrate. It’s the same with siding. The damage hides behind the very thing you’re removing. So when we pulled these gutters down, we found roughly another 40 feet of wood that had to go, rotted from years of water getting behind there where nobody could see it.

“If we find extra wood, that’s a change order, and it’s additional. We always point it out, show you what we’re doing and why. To do it right, the wood needs to be replaced.”— Rhett Wilborn, Owner, Innovative Home Concepts

Before

Before

Now, that extra 40 feet is a change order. It’s additional cost the landlord didn’t plan for, and I get that nobody loves a surprise on a project. So here’s how we handle it, every time. We stop, we point it out, and we show you the actual wood and explain why it can’t stay. We don’t bury it in an invoice and we don’t quietly hang new gutters over rotted wood to keep the number clean. To do the job right, the rot has to come out. Full stop.

If you want a sense of what drives the price on a job like this, our gutter cost guide breaks down the pieces, and hidden wood repair is one of the biggest reasons a real number can move once the work starts. That’s not a scare tactic. It’s just how older homes work.

Field notes

The fix: we flash every gutter

This is the whole ballgame, and it’s why those old steel runs did so much damage. Without flashing, there’s an open path for water to travel back behind the gutter to the fascia board. Moisture sits between the metal and the wood, and over time it rots it out. With flashing, that path is closed. The eave flashing detail is standard building science. It’s just that a lot of the old work around here skipped it. Every gutter my crews have hung, for 21 years, gets flashed.

So on this house, two crews handled it in sequence. The first crew took all the gutters down and replaced every foot of rotted wood, the 50 to 60 we saw plus the 40 we didn’t. Once there was sound wood to fasten to, our crew came in and installed the new system, flashing every run as they went.

The spec upgrade: 6-inch, 3×4, .032 aluminum

We didn’t just replace like-for-like. The landlord wanted longevity, so we put up gutters built to move real water and last:

Why it matters: a 6-inch gutter with a 3×4 downspout carries a lot more water than the standard 5-inch and 2×3 setup, so it overflows less on the big storms we get off the lakes. And .032 aluminum is a heavy gauge. It holds its shape, resists dents and ladder dings, and every one of our gutter products uses it. All in white to keep it clean and simple.

Because these are seamless, they’re rolled on site to the exact length of each run, with no mid-run seams to leak down the road. Old steel rusts. Failed spikes let go. Unflashed runs rot the wood. This system fixes all three at once.

After

After

Before and after, same house

Before

After

What this means for Fox Lake & Lake County homes

Fox Lake, Ingleside, Lakemoor, Round Lake. A huge share of the housing around the Chain O’ Lakes was built in eras when steel gutters were normal and eave flashing was an afterthought. If your home still has any original steel gutters, or a Frankenstein mix of old and newer sections, the odds are decent there’s wood behind them you can’t see yet. The longer unflashed gutters stay up, the more fascia and soffit you lose. In 21 years around these lake towns I have torn off more rotted fascia hiding behind cheap gutters than I could ever count.

We run seamless gutter crews across Lake and McHenry counties, from gutter installation in Wauconda to Island Lake and up through the lake towns. The playbook is the same everywhere: check for rot, replace what’s gone, and flash every gutter so it never starts again.

One honest note, because I’d rather you hear it from us. If your gutters are only a few years old and were installed with flashing and proper hidden hangers, you probably don’t need us yet. Clean them and keep an eye on the fascia. It’s the old steel and the pulling-away sections that need attention now.

Frequently asked questions

Why is water getting behind my gutters and rotting the wood?

Water gets behind a gutter when there’s no flashing bridging the roof edge and the back of the gutter. The runoff wicks behind the gutter, sits against the fascia board, and rots it along with the soffit. Metal trapping moisture against wood, year after year, is what causes the rot. Flashing every gutter closes that path.

Are spike-and-ferrule gutters bad?

Spike-and-ferrule hangers loosen over time. The spike is just a long nail in the fascia, and freeze-thaw works it out until the gutter sags or pulls away. On this Fox Lake home someone had wedged extra nails between the spikes to hold it up. Modern hidden hangers grip far better and don’t rely on a nail staying tight in aging wood.

Should the fascia board be replaced when I get new gutters?

Only the rotted sections need it, but on older or unflashed gutters some rot is common. On this house we could see 50 to 60 feet of rot from the ground and found about 40 more once the gutters came off. Rotted wood has to be replaced before new gutters go up. Hanging new gutters on soft wood just restarts the failure.

What size seamless gutters do I need, 5-inch or 6-inch?

Six-inch K-style gutters with 3×4 downspouts carry substantially more water than standard 5-inch gutters with 2×3 downspouts. For homes with large or steep roof planes and the heavy rain we get off the lakes, the oversized 6-inch system overflows less. We installed 6-inch .032 aluminum gutters on this Fox Lake project.

Can you just patch a few gutter sections instead of replacing everything?

Sometimes, but patched gutters from different years rarely age together. This home was a mix of rusting steel with failed hangers and newer aluminum. Once the fascia is rotting behind the old sections, a full replacement with proper flashing is the only real fix. A patch leaves the water problem in place.

Project details, materials, and footage described here are specific to this Fox Lake, IL home and were confirmed from IHC field records. Every home is different, so scope, wood repair, and pricing vary with what we find on site. Photos are of the actual project.