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How to improve patio drainage?

My outside enclosed patio has drainage issues when I want to flush it out due to corrugated walls enclosing the patio. It can slowly drain underneath but takes too long. Looking for ideas or recommendations for someone to install drainage pipes through the concrete floor and through limestone retaining wall for the water to escape outside.

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Dave-1

Good Morning @neal

🙂 Welcome to the Bunnings community pages! It can be an interesting place to hang out in and I am sure you will get some ideas for your patio in here.

I am trying to picture your patio but not really succeding, any chance of a a few photos of the overall space and if there are low points in the area at all?

Dave

JacobZ

Hi @neal,

I'd also like to welcome you to the Bunnings Workshop community; it is fantastic to have you join us.

As @Dave-1 has said, it's hard to picture your patio, is it possible to get some photos?

Once we have some photos to work with, I'd be happy to offer guidance on the best way to go about increasing the drainage of your patio.

Let me know if you need assistance uploading images, I'd be more than happy to help.

Jacob

neal

https://www.workshop.bunnings.com.au/discussion/comment/38567#Comment_38567

neal

https://www.workshop.bunnings.com.au/discussion/comment/38567#Comment_38567

Photos attached. Possibility is to core a pipe through the concrete at an angle through the outside retaining wall, or cot a channel. Don’t know which would be the advisable and cheaper option.

JacobZ

https://www.workshop.bunnings.com.au/discussion/comment/81449#Comment_81449

Hi @neal,

Is there a roof over the patio?

My first thought is to stop the water from getting into the patio in the first place. Is this a possibility?

Sealing up the patio to prevent water ingress would certainly be cheaper and easier than creating drainage channels to get the water out. Although I note you have louvred windows which might make it a bit tricky.

You might be able to cut channels around the perimeter of the patio using a Demolition Saw and install Everhard 3m EasyDRAIN Compact Polymer Grate And Channel that runs to the outside of the patio with an outlet cored through the block retaining wall.

Drilling an angled core through that concrete would be a considerable task requiring some very expensive equipment that would make this outside the realms of a D.I.Y. job.

If you were to go down this route, you'd likely have to contact a core drilling specialist and a plumber for their assistance.

Allow me to tag some of our helpful members to see their thoughts, @Jewelleryrescue, @TedBear, @DIYGnome, @Dave-1, @CSParnell.

Jacob

neal

https://www.workshop.bunnings.com.au/discussion/comment/105451#Comment_105451

There is roof as it’s fully enclosed. There is little or no water from the roof. Because we have dogs in the patio the issue is flushing the patio out and the only place it can go is underneath the iron sheets. Hair gets stuck and clogged so I need some sort of channel or pipe where it can be flushed straight out onto the outside ground area.

neal

https://www.workshop.bunnings.com.au/discussion/comment/105451#Comment_105451

The photos are the low points where the water gathers when flushed out and washed with a hose.

Dave-1

https://www.workshop.bunnings.com.au/discussion/comment/81449#Comment_81449

Afternoon @neal

Thank you for the photos, I did think the same as @JacobZ about stopping the water before it gets to the patio as being easy to do then install drainage. Then I went through and re-read your question and I think you want to be able to clean and have thatw ater drain away?

Cutting a channel even a narrow one may be the easiest option. I paid a builder to cut my concrete on my driveway and believe me it was worth the money instead of myself having a go. His cut was straight and consistant and I know mine ould not have been as I hant had the practice.

The third photo you put up, you could potential cut out a square of concrete in your slab and install a drain grill there which then you could dig the soil on the other side to take it away. I dont see any waterlines of which way your patio drains is all.

Dave

Dave-1

https://www.workshop.bunnings.com.au/discussion/comment/119869#Comment_119869

Afternoon @neal

With the low points you have shown this takes care of one corner, the other corner could just be a chanel drain cut into the concrete and chiseled out. Cutting a grill drain slot is possible but then going through those retaining blaacks would be a bigger issue.

Thinking outside the square you could shorten the wall (raise the wall) by 40mm so you could hose the patio and the water would blow undre the corrorgated iron?

Dave

Jewelleryrescue

https://www.workshop.bunnings.com.au/discussion/comment/119868#Comment_119868

HI @neal

You want to flush the area out? So that means you are hosing out the patio area it seams to me? But in any case consider the following.

Well see the timber rail along the bottom well i would cut it at each end and lift it up higher creating a bigger gap 30mm or so and any water will flow out faster out down the wall corregations then no drain required.

Additionally this will also help stop timber rot if it is not fully painted underneath.

You will need to carefully remove outside wall fixings to the timber as to minimise any damage to the metal and when the timber raised re fix the iron to the timber. I would spray silver zinc paint on the exposed holes and cover the holes with silver duct tape.

Hope you area fixed soon

neal

https://www.workshop.bunnings.com.au/discussion/comment/128640#Comment_128640

Thanks but it’s metal. And we get snakes so hence the small gap so we don’t get visitors.

JacobZ

https://www.workshop.bunnings.com.au/discussion/comment/134247#Comment_134247

Hi @neal,

It's not really a permanent solution to the issue, but have you considered a wet and dry vacuum?

This might be a simple and cost-effective solution for when you need to clean the area.

Let me know what you think.

Jacob

Dave-1

https://www.workshop.bunnings.com.au/discussion/comment/137820#Comment_137820

Afternoon @neal

How about cutting slots in the tin walls and timber bases and installing steel mesh so it will exclude snakes? You do run up against the mesh clogging due to hair ect but maybe that could be worked around?

Dave

neal

https://www.workshop.bunnings.com.au/discussion/comment/140240#Comment_140240

Thanks for that. It’s an option.

neal

https://www.workshop.bunnings.com.au/discussion/comment/141986#Comment_141986

I think I’m going to get some core holes drilled into the sand base and from the side like my patio concreter has suggested. Then use a flexible pipe to allow water and hair to escape. I imagine I can get a screwable/lockable grate to print anything climbing up the pipe at the top. Does this sound good.

neal

https://www.workshop.bunnings.com.au/discussion/comment/137820#Comment_137820

Does my hole coring suggestion sound a good option.

EricL

https://www.workshop.bunnings.com.au/discussion/comment/140242#Comment_140242

Hello @neal

The issue I see with the sand base is that the covers will move and might not stay level. Have you considered using a surface drain instead such as the Everhard 3m EasyDRAIN Compact Polymer Grate And Channel. It will be easier to anchor into place and the drain can be directed to an existing storm water outlet.

However, before you make any changes, I suggest engaging the services of a plumber as they are the only ones certified to link your drain to your storm water outlet.

If you have any other questions we can help with, please let us know.

Eric

Dave-1

https://www.workshop.bunnings.com.au/discussion/comment/141987#Comment_141987

Evening @neal

Whichever way you go a longer grill to capture the water and "other bits" lol would be something Id factor in. And with the piping I find the small corrorgated flexible pipe that was installed next to my pool tends to clog up with leaves and seed easily. When I redo it I would be using a 90mm pipe at least and probarly a 100mm PVC style pipe. Capacity plus not getting clogged is what I am after.

Dave

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