Drainage Channel

Morning all - hope this is the right place. If it's not please someone move it

My block paving drive slopes slightly down to my garage and as a result when it rains some of the water always ends up flowing into my garage. It's not been a massive problem as I just don't store anything on the floor that could be a problem, but we've started getting fungal growth now in places and the missus has had enough so I need to work out a solution.

First of all a pic:


What I'm thinking of doing is to lift the back row of paving and to drop in one of those drainage channels running to the left and into the soil behind the small wall you can see (there's a couple of foot drop and the soil drains well and already takes most of the run-off from the drive). Then I'd replace the block paving after cutting to size.

Is this a valid option? If not, what would be better? I don't want to lift the block paving to drain the water into the drains.

Is there anything I need to watch out for when laying a drainage channel? Ie what sort of base should it be laid on?

Anything else I should be aware of?

Take a look here, should answer a lot of your questions and give you a few ideas:

http://www.pavingexpert.com/drain06.htm

Brilliant link thanks. My one question: what's C25 concrete?

http://www.pavingexpert.com/concmix1.html

If you click on the links highlighted on Paving Expert they will take you to different areas of the site with further information on particular subjects. Paving Expert is a superb site, there's a wealth of info to be found if you have time to look around.

Thanks yeah I saw that page but most of it makes very little sense to me. I've never mixed or worked with concrete before. Complete novice.

jdpjamesp said:

Brilliant link thanks. My one question: what's C25 concrete?

Click to expand...

Suggest you do not bother your self what it means, but in a nutshell C25 concrete is a mix of 1 -- 1.5 -- 3, cement, sand, aggregate and a compressive strength of 25 newton mm2 at 28 days.
Back in the days before linear drains were introduced, all we used to do was to screw a 25x50 treated timber batten with a mastic seal underneath the batten behind the garage doors and into garage slab. In those days we did not have mastic and used putty mixed with red lead. Used to last approx 5 years before having to renew.
Just a suggestion.
Regards oldun

Thanks for that Makes sense. I quite fancy the idea of putting in drains as a project, but yours may be a much more achievable solution