Cutting a drainage channel

[Antony]

I am attempting to damp proof our basement. (For a plan see

basement is built into earth at the S end and opens out to the garden at the N end. It is unheated and with minimal ventilation right now. It gets some condensation and during the recent heavy rain it got maybe 1/2 litre of water ingress over 2 days.

The floor is asphalted.

I want to use a Platon or Newlath-type membrane on the walls at the S end of the basement and cut a drainage channel to take away any water.

I have some questions:

1. What is the best way of cutting it to form a 50mm-wide channel?
2. What is the best material to line it to provide a smooth run-off?
3. Are there any cold tar-type products that I can proof it with afterwards?

tia

Antony

[Antony]

I am attempting to damp proof our basement. (For a plan see

basement is built into earth at the S end and opens out to the garden at the N end. It is unheated and with minimal ventilation right now. It gets some condensation and during the recent heavy rain it got maybe 1/2 litre of water ingress over 2 days. The floor is asphalted. I want to use a Platon or Newlath-type membrane on the walls at the S end of the basement and cut a drainage channel to take away any water. I have some questions:

1. What is the best way of cutting it to form a 50mm-wide channel?
2. What is the best material to line it to provide a smooth run-off?
3. Are there any cold tar-type products that I can proof it with afterwards?

tia

Antony

[N. Thornton]

Big channelling machine. Angle grinder is cheaper though, with diamond blade.

tar? or cement sand mix to level the bottom then tar.

Regards, NT