Patio on lawn - slope and spacers needed?

[RussellF]

Hi, I'm attempting to lay my first patio - 5x4 B&Q textured paving slabs at 600x600x35mm each, so roughly 3m x 2.4m - with limited traffic as we'll just put low chairs and a garden coffee table on it.
- As the patio is at the end of the garden by the fence, and not near the house, is there still a need to try to get a slope?
- Also, is there best practice (any dis/advantages) as to whether to lay the slabs tight together (which appears easy enough with the ones I'm using) or to use something like a Gapfast 10mm spacer?
Many thanks,
RF
[GALLERY=media, 98250]Patio bed by RussellF posted 28 Aug 2016 at 8:20 PM[/GALLERY][GALLERY=media, 98251]Paving slab by RussellF posted 28 Aug 2016 at 8:20 PM[/GALLERY]
http://www.diy.com/departments/buff-textured-single-paving-slab-l600mm-w600mm/65947_BQ.prd

 

[Tigercubrider]

The slope is to avoid standing water

Dunno about the gap. My patio is edge to edge.

If you want a consistent gap just cut some wood up and use it as temp pegs

 

[RussellF]

Many thanks. Will go for the slope and lay them tight against each other as that's how these ones are shown on the website.

 

[Tigercubrider]

You want the low side about 5cm lower than the high