3 Metres of Channel Drainage Installation All aspects of plumbing questions and answers, help, tips and information

[Danbar7]

I’m looking to install 3m of channel drainage to pick up the rainwater from a new pitched roof and take to an existing gulley.
I’ve got a 9 inch grinder to cut concrete, looking for advice on how far to dig down and if I have to put a concrete bed below the channel?
I’m not a plumber but not shy of DIY.
And advice is welcome

[stoneyboy]

Hi danbar.
Drainage channel is usually about 100mm deep so you'll probably have to cut as deep as you can with your grinder, break out the bottom and lay a weak concrete mix to bed the channel.
Regards S