Drain Unblocking
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Culvert Cleaning, Inspection and Repair in Hertfordshire
What Culvert Cleaning, Inspection and Repair Actually Is
A culvert is the large-diameter pipe, box or brick arch that carries a watercourse under a road, driveway, railway or field access. Its job is to pass surface water without flooding the land above it or washing out the structure. When silt, roots or a cracked barrel stop that flow, the first sign is a garden, carriageway or field that used to drain overnight and now sits under water.
People search culvert cleaning, culvert inspection and culvert repair as if they were three different firms. They are one job on the same asset. We inspect with a crawler camera so we know whether the problem is silt, vegetation or a structural failure. We clean with high-volume jetting and tanker extraction so the barrel is actually empty, not just punched through. And we repair and rehabilitate the structure — lining, patching or replacing the section that has lost its integrity — rather than promising a flush will fix a collapse.
Why Estates, Farms and Councils Book Drain 247
Inspect Before We Quote
A robotic crawler camera so the price is for silt, roots or a collapsed barrel — not a guess from the bank.
Plant That Matches the Diameter
JetVac tankers and high-volume jetting for large-diameter runs. A van jetter is not a culvert clean.
Repair the Structure, Not Just the Flow
CIPP lining and patch repairs restore integrity where the barrel can take a liner. We excavate only when lining will not do.
Silt Taken Away
Registered waste carrier. Arisings leave site with the paperwork a landowner or authority actually needs.
Private Roads, Farms and Estates
Domestic outfalls, estate roads, land-drainage culverts and local-authority runs across Hertfordshire.
Flooding Does Not Wait for Office Hours
A real person answers at three in the morning. If the carriageway or yard is under water, say so and we will tell you what can be there.
Book Culvert Inspection, Cleaning and Repair
Culvert cleaning, CCTV inspection and a structural repair quote — booked now, so the next storm has somewhere to go.
We survey first with a crawler camera where the diameter allows, then jet, grab or mechanically remove the silt and debris. If the barrel is cracked, deformed or collapsed we will show you the footage and quote a lining or excavation repair rather than charging you for a clean that cannot restore the structure.
Call with the address and what you are seeing after rain. We quote a fixed price before plant arrives. Silt is taken away, not flushed into the next landowner’s ditch.
What the Visit Covers
Cleaning, inspection and structural rehabilitation sit on one visit where the site allows. We do not sell a flush if the camera shows a collapse.
Culvert Inspection
A robotic crawler through the barrel — from smaller culverts up to large-diameter runs — so we can see silt depth, joints, cracks, deformation and whether the invert is still there.
Culvert Cleaning
High-volume jetting to scour silt, gravel and scale from the wall — not a domestic jetter stretched past its job.
Silt and Debris Removal
Vacuum tanker extraction so the arisings leave site. Flushing them downstream is not a clean.
Root and Inlet Clearance
Mechanical cutting where vegetation has taken the inlet, the joints or the barrel. A lined pipe still needs the roots out first.
Culvert Repair and Rehabilitation
CIPP lining, localised patches and, where lining cannot restore integrity, excavation of the failed length. The camera is the specification.
A Report You Can Keep
Footage and a written note of remaining defects — useful if a neighbour, insurer or authority later disputes the cause of flooding.
Culvert Inspection and CCTV Surveying
A culvert inspection is not a look from the bank, and it is not a man with a handheld camera. We send a robotic crawler into the barrel — tractor units that cover smaller culverts through to large-diameter runs — and record the invert, the joints, the crown and any deformation. That footage is what tells you whether you need a clean, a structural repair, or both.
What we are looking for is silt depth, root ingress, displaced joints, cracking, loss of invert, corrosion on corrugated steel, and whether the structure is still round or has started to flatten. A clean on a barrel that has already lost its shape is money spent twice.
You get the footage and a written condition note. If the run is a smaller private drain rather than a culvert, the same visit is a CCTV drain survey and we will say so rather than dressing a domestic pipe up as highway work.
Culvert Repair and Structural Rehabilitation
Cleaning restores flow. It does not put the structure back. If the barrel is cracked, fractured, deformed or the invert has gone, the culvert needs a repair that restores structural integrity — otherwise the next storm opens the same hole.
Where the diameter and condition allow, we rehabilitate from the inside. CIPP lining (cured-in-place pipe) forms a new structural wall inside the old one. Patch liners cover a local crack, hole or joint without lining the full length. Both are trenchless: the road, driveway or field access stays in place while the liner cures. The same methods we use on drain repair, scaled to a large-diameter run.
We only recommend excavation when lining cannot restore the barrel — a total collapse, a badly displaced joint, or a section we cannot access from either end. When we do dig, we show you the camera footage that explains why, and we quote the work before a shovel goes in the ground.
Types of Culvert We Inspect, Clean and Repair
Brick, concrete, corrugated steel and plastic all fail in different ways. The camera tells us which, before anyone prices a method that will not fit the material.
Pipe Culverts
Circular concrete, clay or plastic barrels under drives, farm tracks and estate roads. Common on private land around Watford.
Box Culverts
Rectangular concrete sections under wider crossings. Silt sits in the corners; joints open; the invert wears first.
Arch and Masonry Culverts
Brick and stone arches on older Hertfordshire roads and watercourses. Mortar loss, deformed rings and a missing invert are the usual defects.
Corrugated Steel
Galvanised multi-plate and pipe-arch. Corrosion at the waterline and flattening of the crown are why we inspect before we jet.
Bridge and Watercourse Runs
Larger spans carrying a stream under an access. Inlet debris and downstream scour are as much the job as the barrel itself.
Private Outfalls
The large-diameter run off a garden, yard or development into a ditch. Often mistaken for a “blocked drain” until someone looks at the outfall.
How a Culvert Job Works
Inspect, clean, then repair if the structure needs it. We do not skip the camera to get a tanker on site faster.
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Inspect the Barrel
Crawler or push-rod CCTV from the ends we can reach. That shows silt, roots, cracks and whether lining is still possible.
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Clean and De-Silt
High-volume jetting and tanker extraction. Roots and debris are cut out so a liner, if needed, can bond to the wall.
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Repair If the Structure Has Failed
CIPP lining, a patch, or excavation of the length that cannot be saved. Quoted from the footage, before work starts.
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Hand You the Record
After-camera footage and a written note of remaining defects, so you can show an insurer, neighbour or authority what was done.
Who Books Culvert Work
Homeowners
A garden or driveway that floods after rain that used to disappear. Often the outfall or the culvert under the access, not the indoor drains.
Farms and Estates
Field accesses, land-drainage outfalls and estate roads. Plant that can work off a track, not a van that cannot leave the tarmac.
Councils and Managing Agents
Scheduled inspection, cleaning and repair of private or adopted runs, with footage and waste-transfer paperwork for the file.
Builders and Developers
A silted or damaged culvert on a site that has to drain before the next inspection. Survey, clean and repair quoted as one conversation.
Surface Water Has Nowhere to Go
A silted or cracked culvert is often why a garden or carriageway floods in the first heavy rain. We can inspect, clean and quote a structural repair on the same visit.
What Our Customers Say
Brilliant service, they helped unblock my drain really quickly. Would definitely recommend!
An absolute pleasure to deal with. George arrived at my house quickly to take care of a blockage in my drain. He cleared it in less than an hour and was very knowledgeable.
Drain 247’s mapping saved our project from delays. Clear plans, fast service.
Related Drainage Services
CCTV Drain Survey
Camera inspections for homes, small businesses and small sites — footage and a written report you can act on.
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Drain Repair
Patch lining, CIPP lining and gully excavation — cracked and collapsed drains repaired, no-dig first.
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Drain Mapping
Drain mapping for architects, builders and homeowners — scaled plans, invert levels and connections before you apply.
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Drain Jetting
High-pressure water jetting that scours fat, silt and scale off the pipe wall — not a hole punched through it.
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Tanker Services
Vacuum tanker deployment for emptying, interceptors, and jobs too large for a van-mounted unit.
Find out moreCulvert Work Across Hertfordshire
Based in Watford. Culvert cleaning, inspection and repair across Hertfordshire and north west London.
- Watford
- St Albans
- Hemel Hempstead
- Rickmansworth
- Bushey
- Croxley Green
- Abbots Langley
- Kings Langley
- Chorleywood
- Berkhamsted
- Bricket Wood
- Cassiobury
- Moor Park
- Borehamwood
- Elstree
- Radlett
- Harpenden
- Potters Bar
- Hatfield
- Welwyn Garden City
- Harrow
- Pinner
- Northwood
- Ruislip
- Harefield
- Stanmore
- Edgware
- Hendon
- Barnet
- Brent Cross
- Wembley
- Enfield
- Aylesbury
- Milton Keynes
Common Questions About Culvert Cleaning, Inspection and Repair
What Is a Culvert?
A culvert is a drain, pipe, box or brick arch that carries a watercourse under a road, driveway, railway or field access. Its purpose is to pass surface water without flooding the land above it or eroding the structure. If that barrel silts up or fails, the water has nowhere to go.
How Do I Know If the Culvert Is the Problem?
If surface water used to clear and now ponds after ordinary rain, the outfall is the first place to look. A camera survey tells you whether it is silt, a collapse, or something downstream that is not yours.
What Makes Culvert Cleaning Different from Drain Cleaning?
Diameter, volume and access. A culvert is a large-diameter structure carrying a watercourse, not a 100mm house drain. It needs high-volume jetting, tanker extraction and often a crawler camera, not a van jetter and a plunger. If the run is actually a domestic drain we will say so and quote drain jetting or unblocking instead.
Do You Inspect Culverts as Well as Clean Them?
Yes. Culvert inspection is the first part of the job. We camera the barrel so we know whether we are looking at silt, roots or a structural failure, and we will not quote a clean as a cure if the footage shows a collapse. The same kit is used on a CCTV drain survey where the run is a smaller private pipe.
Can You Repair a Culvert Without Digging Up the Road?
Often, yes. CIPP lining and patch liners rehabilitate cracked, fractured or leaking barrels from the inside, so the carriageway, driveway or field access stays in place. We only excavate when lining cannot restore the structure, and we show you the footage that explains why.
Can You Restore the Structural Integrity of a Culvert?
Where the barrel can take a liner, yes. A correctly installed CIPP liner is a structural pipe in its own right: it restores the wall, seals joints and gives the invert back. A total collapse, a badly displaced section, or a length we cannot access still needs excavation. We quote that separately rather than lining a hole that is no longer a pipe.
What Types of Culvert Do You Work On?
Pipe, box, brick-arch, masonry, corrugated steel and private outfalls — under drives, farm tracks, estate roads and watercourses. The material decides the repair. Corrugated steel that has lost its invert is a different job from a silted concrete pipe.
Can You Work on a Culvert Under a Road or Driveway?
Yes, provided we can access both ends or a chamber. Trenchless lining is how we avoid breaking the surface. We will not recommend excavation through a carriageway until the camera has shown that lining or a clean will not do.
Do You Take the Silt Away?
Yes. Flushing it into the next landowner’s ditch is not a clean. Arisings are removed and disposed of as a registered waste carrier, with the paperwork that goes with that.
How Much Does Culvert Cleaning or Repair Cost?
We quote a fixed price before we start, from what the camera shows and how much plant the diameter needs. There is no call-out fee. A silted private outfall is a different price from lining a collapsed barrel under a road, which is why we will not price it from a photograph of the inlet alone.
Culvert Blocked, Cracked or Silting Up?
We inspect, clean and structurally repair large-diameter runs and culverts for homeowners, farms, estates and local authorities.