Slate paving - Slip resistance

[nearlyfinished]

Considering laying slate pavings for a patio area with steps down to the garden the area this will be the main access from the house to the garden, have been advised that slates could be slippery when wet. Lots of different opinions on-line but does anyone have any experience of this?
Thank you.

[rab1]

Read the main site. The Boss spent ....? building it.so look, all you need to know and a dam sight more is there. :p

[Carberry]

Some is slippery, some isn't. Make sure you buy from a reputable place like londonstone.com or you might end up with crappy chinese slate or internal slate being sold for external use.

The other problem you can have that will cause slipperiness is algae / moss growth if your paving isn't sealed, maintained, in a low traffic area and or shaded area.

[Tony McC]

The really good suppliers publish infor on slip resistance, often given as a SRV number. In essence, owt higher than 50 is not bad, anything above 65 is bloody good

[danstan]

Slate can become very slippy first thing in the morning with a thick frost laying on it (you could argue that this is the case for most things)

We particularly noticed this last winter (harsh winter) on our display of slate - t'was like a skating rink.

What about granite with flamed finish - available in a darker graphite type colour - nice product.

[London Stone Paving]

In 5 years of selling slate not a single customer has ever called to say that the slate they have purchased is slippy. Any natural stone will be slippy if water is allowed to collect on its surface. As long as slate is installed with a correct fall it will cause you no problems

Steve