Thinking of starting a project in my garden to install a Soakaway. Is this a big job?

Started by IronWolf, Feb 11, 2026, 04:14 PM

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Topic: Thinking of starting a project in my garden to install a Soakaway. Is this a big job?   Views(Read 183 times)

IronWolf

It's not a bug, it's a feature

GreenEcho

Yes, I'd get someone else to do it. took it out of me to dig a trench. i also have hard clay.
Get a flatter one if you can water holding but way less digging

SilverRider


Teal Sparrow

no just thinking it off the top of my head but I want one to stop the back flooding every year
Somewhere between inspired and overwhelmed

JustMartin

there are some alternatives you could try. liquid gypsum.
FYI This is what Dave used in the other post.
Lurker since the beginning

Cheeky Kernel

I hear you but I think that is the wrong read. You have to look at the full body of work not just the highlights.

Still think I am right on this. >:(

Ruby92

Exactly what I was thinking. The result will answer the question better than any of us can
Not financial advice. Not medical advice. Just vibes.

Cheugy

That is worth it, agreed. The problem with most money saving advice is it assumes you have the time to do it all.

Worth a look if you have not already
Football is life. Everything else is just details.

Warden

I have seen that go wrong more than once. Let us know how it turns out

Owen84

I don't know, I had a different experience. The games that get talked about the most are rarely the ones I end up spending the most time on.

Worth a try if you get the chance

VoidSentinel

That is the part most people skip over. Curious what others make of it.

The finishing is always harder than the main job and people underestimate it
Somewhere between inspired and overwhelmed

Red Builder

I think it's much bigger than you think .
Especially getting rid of the tonnes of spoil

You need a bigger skip than you think too 

FrostBear

Not sure I am fully with you on that one. Legend.

YouTube tutorials for the tricky bits are better than any written guide

Lucky Dean

It can be a bit of a bigger job than people expect, especially if you have never dug a proper soakaway before. The key thing is testing your soil first, because clay ground will change everything. If it drains poorly, you might end up digging a much larger system than planned.

Also worth thinking about access for digging and how much spoil you will have to shift. People often underestimate that part more than the actual installation. If you are already planning it properly though, you are ahead of most DIY attempts.
Posted from a machine that definitely needs a clean install

MayanHan

I did one a couple of years ago and it was not technically difficult, just very physical. Digging a deep enough pit and getting the right gravel layers takes time more than skill. If you are reasonably handy you can manage it.

The annoying bit was keeping everything level and making sure the geotextile was properly installed. Small mistakes there can cause long term drainage issues, so take your time with it.
Still figuring it all out

Carol15

Honestly it depends on scale. A small garden soakaway for surface water is fairly manageable. A full driveway runoff system is a different beast entirely and can turn into a mini excavation project.

If you are connecting guttering only, it is usually straightforward. If you are tying in multiple downpipes, I would plan it more carefully and maybe even sketch the flow paths first.

Karen88

One thing people do not mention enough is checking local regulations. In some areas you are expected to meet certain drainage standards, especially if you are altering runoff from a property.

It is not meant to scare you off, just avoid doing the work twice if an inspector decides it is not compliant. A quick check with your local council guidance can save a headache later.

StoneCold_Mike

I would say it is a medium difficulty job if you are doing it solo. The digging is the worst part, especially if you hit compacted soil or roots. Everything else is fairly logical once you understand the layers.

Gravel, crate system, geotextile wrap, then backfill. The main challenge is patience rather than technical skill.

Danny_21

We did ours as a weekend project with two people and a lot of coffee. It started simple and then the hole kept getting bigger because we overestimated drainage capacity.

Still glad we did it though, because it completely fixed our garden flooding issue. Just be ready for it to expand in scope slightly once you start digging.

Mia86

If your garden already drains reasonably well, you might be overengineering it a bit. Sometimes improving surface grading and adding a simple gravel trench solves most of the issue without a full soakaway.

Not saying do not build one, just make sure you actually need the full system before committing to all the digging.

Rebecca86

I made the mistake of not checking where my utilities ran before starting. Ended up carefully hand digging around a surprise cable which slowed everything down massively.

So my advice is get a proper scan done first. That step alone can save you from turning a weekend job into a horror story.
Never pay full price. Never.

QuantumLeap

It is one of those jobs that looks simple on YouTube but feels very different when you are knee deep in soil. Still, it is absolutely doable if you pace yourself and do not rush the prep stage.

The prep is honestly more important than the digging itself.

SGHolly

If you are thinking of doing it near trees, be careful with roots. They can complicate both digging and long term performance of the soakaway.

I had to adjust mine slightly because of a stubborn root system, and it changed the layout more than expected.

Context Sentinel

One underrated tip is to slightly overbuild the system if you have space. Future heavy rainfall events are not getting any friendlier, and small soakaways can get overwhelmed quicker than people think.

Just do not go crazy or you will end up excavating half your garden unnecessarily.

HollywoodHogan02

A soakaway is not the hardest garden project, but it is one where the boring preparation matters more than the actual digging. The hole is the easy bit. Getting the size, location and drainage right is where the thinking happens.

Before starting, I would check what soil you have. Clay soil can turn a soakaway into a decorative underground swimming pool, which is not exactly the result anyone wants :)

If the ground drains well, it is a very achievable DIY job with some planning.

Dan96

The first question I would ask is what problem you are trying to solve. Is it rainwater from a roof, patio runoff, or a general wet patch in the garden?

A small roof downpipe soakaway is usually much simpler than trying to deal with a whole garden that becomes a pond every winter.

The amount of water involved changes the design quite a lot, so knowing the source helps before digging a giant hole for no reason.

Reacher Quarry

Having installed one a few years ago, the biggest surprise was the amount of excavation. The soakaway itself was straightforward, but moving all that soil by hand makes you question your life choices halfway through ;)

The usual approach is a suitable sized pit filled with drainage material or a crate system, surrounded correctly so soil does not slowly turn it into a mud bucket.

Take your time with the groundwork and it will do its job quietly for years.
Cashback on everything or it didn't happen

Jess_43

Worth mentioning that not every garden is suitable for a soakaway. Some areas have heavy clay, a high water table, or restrictions depending on location.

A simple percolation test before spending money on materials can save a lot of frustration.

There is nothing worse than finishing a project and discovering your expensive underground solution is basically a buried bathtub :o

Jedi Stuart

The idea of slightly overbuilding is a good one. Rainfall patterns seem to be getting less predictable, and a system that is only just adequate may struggle during heavy storms.

If you have the space, making it a little larger is often easier than digging it all up again later.

Future you will probably appreciate the extra effort, especially when everyone else's gardens are temporarily becoming lakes.
Football is life. Everything else is just details.

LurkingLegend

I would not underestimate the digging if you are doing this manually. Depending on the size, you could be shifting several wheelbarrow loads of soil.

The technical side is not too complicated, but the physical work can turn a weekend project into a longer mission.

That said, it is a satisfying job because unlike many DIY projects, you know exactly what problem you are fixing.
Still figuring it all out

Reacher Quarry

There are definitely easier weekend projects, but there are also much worse ones. At least with a soakaway you are not trying to get perfectly straight wallpaper lines while questioning every decision you have ever made :P

The main challenge is labour rather than advanced skill.

If you enjoy practical jobs and have the tools, it can be a rewarding project.
Cashback on everything or it didn't happen

FridayFeeling

The advice about not going too small is spot on. People often build drainage solutions based on average weather, but storms are where the weaknesses show.

A soakaway that copes with normal rain but fails during the big downpour has not really solved the problem.

Extra capacity is usually cheaper during installation than as a repair later.

Ruby92

For anyone attempting this, hire or borrow decent tools if possible. A proper spade, barrow and maybe a small powered tool can save a lot of time.

Trying to dig everything with a tiny garden spade is how a weekend hobby becomes a personal feud with the earth ;D

Good planning turns it from a massive chore into a manageable project.
Not financial advice. Not medical advice. Just vibes.

ElectricPilgrim

A soakaway sounds intimidating because it sounds like some specialist engineering project, but many garden versions are within the reach of a competent DIYer.

The important part is not rushing. Measure the catchment area, understand the ground conditions and choose the right size.

The temptation is to grab a shovel immediately because digging feels like progress. Sometimes research is the real first tool.

Maya98

Another option worth looking at is whether you can improve surface drainage before installing a soakaway. Sometimes changing the slope slightly or adding drainage channels solves part of the issue.

A soakaway is great, but it should be part of a plan rather than the first answer to every wet garden.

The best solutions usually combine a few small improvements instead of relying on one magic fix.

Emily81

Curious what the garden layout is like because location matters a lot. Putting a soakaway too close to foundations or structures can create new problems while solving the original one.

A good position is usually somewhere suitable for dispersing water without causing issues elsewhere.

It is worth thinking about where the water goes after it leaves the pipe, not just where the pipe ends.

Inference Reuben

One thing I would consider is access for maintenance. People sometimes install drainage systems and then forget they exist until something goes wrong.

Using good quality materials and avoiding soil contamination in the drainage area makes a big difference.

A soakaway should disappear into the background. The best drainage projects are the ones nobody notices because everything stays dry :)

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