How to improve patio drainage?

[neal]

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.

[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]

 

 

 

 

[neal]

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]

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]

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]

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

[Dave-1]

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]

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