Concrete gutters aren't automatically bad, but they often cause expensive water damage and structural headaches when they crack or wear out
How do you stop concrete gutters from leaking?
Stop concrete gutter leaks by cleaning the surface, filling gaps with fast-setting cement, and sealing with acrylic roof coating
First, clear out every bit of debris and let the gutter dry completely. Scrub the inside with a wire brush to remove old sealant flakes and loose chunks. Pack small cracks with a quick-setting cement like Quikrete Hydraulic Water-Stop Cement—it expands as it hardens to seal gaps tight. Once that’s firm, brush on a heavy coat of acrylic roof sealant such as Henry 208 1-Gal. Wet Patch Roof Cement. Wait until it’s fully dry, then add a second coat for extra protection. Keep in mind this is a stopgap; for a permanent fix, think about adding a liner or replacing the whole gutter.
Why do Finlock gutters fail?
Finlock gutters usually fail because their lining expands and contracts with temperature swings, eventually cracking or pulling apart
The lightweight aggregate concrete used in these gutters moves with every heat wave and cold snap, which slowly tears the material. Add in shoddy installation or mismatched components, and you’ve got a recipe for leaks and sagging. Some older Finlock linings even contained asbestos, which becomes dangerous if disturbed. If you spot cracks, dips, or water stains that won’t quit, call in a pro for a proper look. You’ll probably need to rip it out and swap in modern materials before the water ruins your foundation or walls.
What is a concrete gutter?
A concrete gutter is a rigid concrete channel poured in place along sidewalks or driveways to steer runoff away from buildings
These gutters are usually formed with stationary molds or slipform machines and can last decades with almost no upkeep. Builders love them for their strength and load-bearing ability, but they’re not flexible—if the ground shifts or the install is sloppy, cracks appear fast. Homeowners should check their concrete gutters regularly for splits or uneven edges to keep water from sneaking in and causing trouble. If you're considering a similar installation, you may want to research concrete border edging techniques for additional guidance.
Can you line a gutter?
Yes—gutters can be lined with a waterproof membrane to patch leaks or boost performance
EPDM rubber or PVC liners stick to concrete, metal, or even old Finlock gutters, creating one seamless, waterproof layer that stops leaks and adds years to the gutter’s life. First, scrub the inside clean; then measure, cut, and fit the liner. Secure it with adhesive or screws, overlapping seams by a few inches. DIYers can tackle this with basic tools and save a ton versus full replacement. Just remember—if the gutter’s already sagging or cracked, a liner might only buy you time. For more on concrete maintenance, see our guide on concrete volume calculations.
When were Finlock gutters used?
Finlock gutters were all the rage in the UK and parts of Europe during the 1960s and early 1970s
These prefab concrete sections were sold as quick-install, long-lasting gutters. Over time, though, problems surfaced: the liners expanded and cracked in heat, some contained asbestos, and tougher, bendier materials hit the market. Many homes from that era still have Finlocks, and now they’re showing their age. If yours is original, get it checked and plan for a replacement before it starts leaking. For more on historical building materials, consider reading about concrete versus wood in construction.
What is gutter in construction?
A construction gutter is a narrow channel that catches rainwater running off a roof and sends it away from the building’s foundation
You’ll usually find gutters fastened along the roofline, tied into downspouts that whisk water to storm drains or dry wells. Their main job is shielding your home from water damage, soil erosion, and flooded basements. Materials range from aluminum and vinyl to steel and concrete. Don’t skip the upkeep—clear leaves and check for leaks, or you’ll be staring down costly repairs sooner than you think. If you're exploring gutter options, you might also want to learn about gutter longevity.
How do you fix rust holes in gutters?
Patch rust holes by sanding the area, slathering roofing cement around the hole, and covering it with a metal patch
Grab a stiff wire brush and scrub the rust away, then wipe the spot clean. Squeeze a bead of roofing cement—Henry 208 1-Gal. Wet Patch Roof Cement works well—around the hole’s edges. Cut a piece of aluminum or galvanized steel flashing big enough to overlap the damage by at least an inch. Press it into the cement, tack it down with roofing nails or screws, and coat the patch with another layer of cement. Got a bigger problem? Replace that whole section instead.
How much is concrete curb per foot?
As of 2026, expect to pay about $6.19 per linear foot for materials and $3,007.43 for 100 linear feet including labor
| Cost type | Amount | Notes |
|---|
| Materials (per linear foot) | $6.19 | National average as of 2026 |
| Labor + materials (per 100 linear feet) | $3,007.43 | Range: $2,722.73 – $3,292.13 |
Prices swing wildly depending on where you live, how tall the curb is, and what’s underfoot. Fancy colored or stamped concrete will cost more than plain gray. Always get three quotes from local crews and ask about permits—some towns treat curbs like major construction. If you’re in a freeze-thaw zone, insist on air-entrained concrete; it holds up way better. For more pricing details, check our guide on concrete costs in Fresno.
How much concrete do I need for a curb?
Figure out the cubic yards of concrete by multiplying length × width × height, then divide by 27
Measure your curb in inches or feet. Say it’s 100 ft long, 6 in wide, and 8 in tall. Convert everything to feet: 100 ft × 0.5 ft × 0.67 ft = 33.5 cubic feet. Divide by 27 to get 1.24 cubic yards. Order 10–15% extra for spillage and uneven ground. A quick online calculator can double-check your math. For hassle-free delivery, call your local ready-mix plant and have them bring exactly what you need.
What is the purpose of curb and gutter?
Curb and gutter systems protect roads by channeling stormwater off the pavement, reducing potholes and road damage
These paired elements—a raised curb plus an adjacent gutter channel—guide water into catch basins or drainage ditches so it doesn’t pool and weaken the road surface. Without them, you’d see more cracks, potholes, and erosion that chews up pavement and floods nearby yards. In neighborhoods, curb and gutter also keep drivers safer by marking clear boundaries. Check them every so often for cracks or gaps; a little maintenance now saves big headaches later. If you're dealing with gutter issues, you may also want to explore repair costs for box gutters.
