paving slope

[dada]

am block paving a patio about 8m in width and need to drain this water towards a drain, lot of which runs off the clay garden.
could anyone advise me the minimum slope i should use in order to get the water to drain away.
i have a digital spirit level that will read 1.2 (for example).
apart from not putting enough slope in, if i put too much in by the time i get my block paving to the drain it could be several inches below it and it cant be lowered?
thanks

 

[holmslaw]

My paving slopes at about 1-150, if I was doing it again I'd go 1-200.

 

[dada]

anyone know what that quates to as an angle?

 

[noseall]

anyone know what that quates to as an angle?

0.28 degrees. (applies to a 1 in 200 fall)

 

[dada]

thanks
noseall - would you go for 150 or 200?

 

[holmslaw]

I would'nt bother with the actual angle, if you set an angle on your level and somehow lose the setting you could end up in a right mess.

Try this, say your level is 1000mm long, for 1-150 fix a 7mm [5mm for 1-200] spacer to one end of the level, then securely fix the level to a straight edge.

This way all you have to keep an eye on is that the level is always indicating zero, as long as it does you know you are maintaining your chosen fall.

 

[jeds]

1 in 150 (or 200) seems very shallow to me. I would say 1 in 80 would be needed to create reasonable surface drainage.

 

[noseall]

Over say 8m, an 80mm fall (or 1 brick course), both looks and performs ok.

 

[seasickstevie]

Over say 8m, an 80mm fall (or 1 brick course), both looks and performs ok.

This is where my brain starts to hurt!

Would that be 1:100 noseall? (please tell me I'm correct)

 

[stuart45]

You are spot on SNM.

 

[ey143]

I'm getting a curb dropped and the council indicated that my drive way should slope no more than 1:10

Could someone please explain what that means and how it is measured?

Thanks.